Redbox RB-PLI6 - Uncategorized Sonifex - Free user manual and instructions

USER MANUAL Redbox RB-PLI6 Sonifex

RB-UL1 Single Stereo Unbalanced To Balanced Converters

RB-UL2 Dual Stereo Unbalanced To Balanced Converters

RB-UL4 Quad Stereo Unbalanced To Balanced Converters

RB-LU4 Quad Stereo Balanced To Unbalanced Converter

RB-BL2 Single Bi-Directional Matching Converter

RB-BL4 Dual Stereo Bi-Directional Matching Converter

RB-PA2 Dual Stereo RIAA Phono Amplifier

RB-LI2 Stereo Line Isolation Unit

RB-PLI6 6 Way Mono Passive Line Isolation Unit

Manufacturers of audio & video products for radio & TV broadcasters

SONIFEX

Redbox Handbook 3

For the latest Sonifex handbook information please visit the Sonifex website at www.sonifex.co.uk

Redbox User Handbook No 3

Stock Code: 30-339

Artwork: AW10833

Revision 3.02, March 2020

©Sonifex Ltd, 2020

All Rights Reserved

Sonifex Ltd, 61, Station Road, Irthlingborough,

Northants, NN9 5QE, England.

Tel: [phone]

Fax: [phone]

Email: [e-mail]

Website: https://www.sonifex.co.uk

Information in this document is subject to change without notice and does not represent a commitment on the part of the vendor. Sonifex Ltd shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual.

No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, information storage and retrieval systems, for any purpose other than the purchaser's personal use, without the express written permission of Sonifex Ltd. Unless otherwise noted, all names of companies, products and persons contained herein are part of a completely fictitious adaptation and are designed solely to document the use of Sonifex product.

Made in the UK by SONIFEX

Contents

Contents

Product Warranty - 2 Year Extended ii

Sonifex Warranty & Liability Terms & Conditions ii

1. Definitions ii

2. Warranty ii

Unpacking Your Product iii

Repairs & Returns iv

€ Conformity iv

Safety & Installation of Mains Operated Equipment iv

Voltage Setting Checks iv

Fuse Rating iv

Power Cable & Connection iv

WEEE Directive v

Atmosphere/Environment v

Fitting Redboxes v

1 RB-UL1 Single Stereo Unbalanced To Balanced Converters 1

Introduction 1

System Block Diagram 1

Rear Panel Connections and Operation 1

Technical Specifications RB-UL1 2

2 RB-UL2 Dual Stereo Unbalanced To Balanced Converters 3

Introduction 3

System Block Diagram 3

Rear Panel Connections and Operation 3

Technical Specifications RB-UL2 4

3 RB-UL4 Quad Stereo Unbalanced To Balanced Converters 5

Introduction 5

System Block Diagram 5

Rear Panel Connections and Operation 5

Technical Specifications RB-UL4 6

4 RB-LU4 Quad Stereo Balanced To Unbalanced Converter 7

Introduction 7

System Block Diagram 8

Rear Panel Connections and Operation 9

Technical Specifications RB-LU4 9

5 RB-BL2 Single Bi-Directional Matching Converter 11

Introduction 11

System Block Diagram 11

Rear Panel Connections and Operation 12

Balanced to Unbalanced Connections 12

Unbalanced to Balanced Connections 12

Technical Specifications RB-BL2 13

6 RB-BL4 Dual Stereo Bi-Directional Matching Converter 14

Introduction 14

System Block Diagram 14

Rear Panel Connections and Operation 15

Balanced to Unbalanced Connections 15

Unbalanced to Balanced Connections 16

Technical Specifications RB-BL4 16

7 RB-PA2 Dual Stereo RIAA Phono Amplifier 17

Introduction 17

System Block Diagram 17

Rear Panel Connections and Operation 18

Technical Specifications RB-PA2 19

8 RB-LI2 Stereo Line Isolation Unit 20

Introduction 20

System Block Diagram 20

Rear Panel Connections and Operation 21

Technical Specifications RB-LI2 22

9 RB-PLI6 6 Way Mono Passive Line Isolation Unit 23

Introduction 23

System Block Diagram 23

Rear Panel Connections and Operation 24

Technical Specifications RB-PLI6 25

Figures

Figures

Fig A: RB-RK1 Small Redbox Front Rack-mount Kit . v

Fig B: RB-RK2 Small Redbox Rear Rack-mount Kit. vi

Fig C: RB-RK3 Large Redbox Rear Rack-mount Kit. vi

Fig 1-1: RB-UL1 Front Panel 1

Fig 1-2: RB-UL1 System Block Diagram 1

Fig 1-3: RB-UL1 Rear Panel 2

Fig 2-1: RB-UL2 Front Panel 3

Fig 2-2: RB-UL2 System Block Diagram 3

Fig 2-3: RB-UL2 Rear Panel 4

Fig 3-1: RB-UL4 Front Panel 5

Fig 3-2: RB-UL4 System Block Diagram 5

Fig 3-3: RB-UL4 Rear Panel 6

Fig 4-1: RB-LU4 Front Panel 7

Fig 4-2: RB-LU4 System Block Diagram 8

Fig 4-3: RB-LU4 Rear Panel 9

Fig 5-1: RB-BL2 Front Panel 11

Fig 5-2: RB-BL2 System Block Diagram 11

Fig 5-3: RB-BL2 Rear Panel 12

Fig 6-1: RB-BL4 Front Panel 14

Fig 6-2: RB-BL4 System Block Diagram 14

Fig 6-3: RB-BL4 Rear Panel 15

Fig 7-1: RB-PA2 Front Panel 17

Fig 7-2: RB-PA2 System Block Diagram For a Single

Stereo Channel 17

Fig 7-3: RB-PA2 Rear Panel 18

Fig 8-1: RB-LI2 Front Panel. 20

Fig 8-2: RB-LI2 System Block Diagram 20

Fig 8-3: RB-LI2 Rear Panel 21

Fig 8-4: RB-LI2 Jumper Positions on the PCB 22

Fig 9-1: RB-PLI6 Front Panel 23

Fig 9-2: RB-PLI6 System Block Diagram 23

Fig 9-3: RB-PLI6 Rear Panel 24

Fig 9-4: RB-PLI6 Ground-link Jumper Settings 24

SONIFEX

Register Online for an Extended 2 Year Warranty

As standard, Sonifex products are supplied with a 1 year back to base warranty.

If you register the product online, you can increase your product warranty to 2 years and we can also keep you informed of any product design improvements or modifications.

Product:

Serial No: ____

To register your product, please go online to www.sonifex.co.uk/register

Warranty

Product Warranty - 2 Year Extended

As standard, Sonifex products are supplied with a 1 year back to base warranty. In order to register the date of purchase and so that we can keep you informed of any product design improvements or modifications, it is important to complete the warranty registration online. Additionally, if you register the product on the Sonifex website, you can increase your product warranty to 2 years. Go to the Sonifex website at: https://www.sonifex.co.uk/technical/register/index.asp to apply for your 2 year warranty.

Note: For your own records the product serial number is recorded on the CE certification page of this handbook.

Sonifex Warranty & Liability Terms & Conditions

1. Definitions

'the Company' means Sonifex Ltd and where relevant includes companies within the same group of companies as Sonifex Limited.

'the Goods' means the goods or any part thereof supplied by the Company and where relevant includes: work carried out by the Company on items supplied by the Purchaser; services supplied by the Company; and software supplied by the Company.

'the Purchaser' means the person or organisation who buys or has agreed to buy the Goods.

'the Price' means the Price of the Goods and any other charges incurred by the Company in the supply of the Goods.

'the Warranty Term' is the length of the product warranty which is usually 12 months from the date of despatch; except when the product has been registered at the Sonifex website when the Warranty Term is 24 months from the date of despatch.

'the Contract' means the quotation, these Conditions of Sale and any other document incorporated in a contract between the Company and the Purchaser.

This is the entire Contract between the parties relating to the subject matter hereof and may not be changed or terminated except in writing in accordance with the provisions of this Contract. A reference to the consent, acknowledgement, authority or agreement of the Company means in writing and only by a director of the Company.

2. Warranty

a. The Company agrees to repair or (at its discretion) replace Goods which are found to be defective (fair wear and tear excepted) and which are returned to the Company within the Warranty Term provided that each of the following are satisfied:

i. notification of any defect is given to the Company immediately upon its becoming apparent to the Purchaser;

ii. the Goods have only been operated under normal operating conditions and have only been subject to normal use (and in particular the Goods must have been correctly connected and must not have been subject to high voltage or to ionising radiation and must not have been used contrary to the Company's technical recommendations);

iii. the Goods are returned to the Company's premises at the Purchaser's expense;

iv. any Goods or parts of Goods replaced shall become the property of the Company;

v. no work whatsoever (other than normal and proper maintenance) has been carried out to the Goods or any part of the Goods without the Company's prior written consent;

Warranty

vi. the defect has not arisen from a design made, furnished or specified by the Purchaser;
vii. the Goods have been assembled or incorporated into other goods only in accordance with any instructions issued by the Company;
viii. the defect has not arisen from a design modified by the Purchaser;
ix. the defect has not arisen from an item manufactured by a person other than the Company. In respect of any item manufactured by a person other than the Company, the Purchaser shall only be entitled to the benefit of any warranty or guarantee provided by such manufacturer to the Company.

b. In respect of computer software supplied by the Company the Company does not warrant that the use of the software will be uninterrupted or error free.

c. The Company accepts liability:

(i) for death or personal injury to the extent that it results from the negligence of the Company, its employees (whilst in the course of their employment) or its agents (in the course of the agency);
(ii) for any breach by the Company of any statutory undertaking as to title, quiet possession and freedom from encumbrance.

d. Subject to conditions (a) and (c) from the time of despatch of the Goods from the Company's premises the Purchaser shall be responsible for any defect in the Goods or loss, damage, nuisance or interference whatsoever consequential economic or otherwise or wastage of material resulting from or caused by or to the Goods. In particular the Company shall not be liable for any loss of profits or other economic losses. The Company accordingly excludes all liability for the same.

e. At the request and expense of the Purchaser the Company will test the Goods to ascertain performance levels and provide a report of the results of that test. The report will be accurate at the time of the test, to the best of the belief and knowledge of the Company, and the Company accepts no liability in respect of its accuracy beyond that set out in Condition (a).
f. Subject to Condition (e) no representation, condition, warranty or other term, express or implied (by statute or otherwise) is given by the Company that the Goods are of any particular quality or standard or will enable the Purchaser to attain any particular performance or result, or will be suitable for any particular purpose or use under specific conditions or will provide any particular capacity, notwithstanding that the requirement for such performance, result or capacity or that such particular purpose or conditions may have been known (or ought to have been known) to the Company, its employees or agents.
g. (i) To the extent that the Company is held legally liable to the Purchaser for any single breach of contract, tort, representation or other act or default, the Company's liability for the same shall not exceed the price of the Goods.
(ii) The restriction of liability in Condition (g)(i) shall not apply to any liability accepted by the Seller in Condition (c).
h. Where the Goods are sold under a consumer transaction (as defined by the Consumer Transactions (Restrictions on Statements) Order 1976) the statutory rights of the Purchaser are not affected by these Conditions of Sale.

Unpacking Your Product

Each product is shipped in protective packaging and should be inspected for damage before use. If there is any transit damage take pictures of the product packaging and notify the carrier immediately with all the relevant

CE Conformity

details of the shipment. Packing materials should be kept for inspection and also for if the product needs to be returned.

The product is shipped with the following equipment so please check to ensure that you have all of the items below. If anything is missing, please contact the supplier of your equipment immediately.

Item

Quantity

Product unit 1

IEC mains lead fitted with moulded mains plug 1

Handbook and warranty card 1

If you require a different power lead, please let us know when ordering the product.

Repairs & Returns

Please contact Sonifex or your supplier if you have any problems with your Sonifex product. Email [e-mail] for the repair/ upgrade/returns procedure, or for support & questions regarding the product operation.

CE Conformity

The products in this manual comply with the essential requirements of the relevant European health, safety and environmental protection legislation.

The technical justification file for this product is available at Sonifex Ltd.

The declaration of conformity can be found at: https://www.sonifex.co.uk/declarations

Safety & Installation of Mains Operated Equipment

There are no user serviceable parts inside the equipment. If you should ever need to look inside the unit, always disconnect the mains supply before removing the equipment covers. The cover is connected to earth by means of the fixing screws. It is essential to maintain this earth/ground connection to ensure a safe operating environment and provide electromagnetic shielding.

Voltage Setting Checks

Ensure that the machine operating voltage is correct for your mains power supply by checking the box in which your product was supplied. The voltage is shown on the box label. The available voltage settings are 115V, or 230V. Please note that all products are either switchable between 115V and 230V, or have a universal power supply.

Fuse Rating

The product is supplied with a single fuse in the live conducting path of the mains power input. For reasons of safety it is important that the correct rating and type of fuse is used. Incorrectly rated fuses could present a possible fire hazard, under equipment fault conditions. The active fuse is fitted on the outside rear panel of the unit.

Power Cable & Connection

An IEC power connector is supplied with the product which has a moulded plug attached.

The mains plug or IEC power connector is used as the disconnect device. The mains plug and IEC power connector shall remain readily operable to disconnect the apparatus in case of a fault or emergency.

The mains lead is automatically configured for the country that the product is being sent to, from one of:

Territory Voltage IEC Lead Type Image

UK & Middle East 230V UK 3 pin to IEC lead
Europe 230V	European Schuko round 2 pin to IEC lead
USA, Canada and South America	115V 3 flat pin to IEC lead
Australia & New Zealand	230V Australasian 3 flat pin to IEC lead

Connect the equipment in accordance with the connection details and before applying power to the unit, check that the machine has the correct operating voltage for your mains power supply.

This apparatus is of a class I construction. It must be connected to a mains socket outlet with a protective earthing connection.

Important note: If there is an earth/ground terminal on the rear panel of the product then it must be connected to Earth.

WEEE Directive

The Waste Electrical and Electronic Equipment (WEEE) Directive was agreed on 13 February 2003, along with the related Directive 2002/95/EC on Restrictions of the use of certain Hazardous Substances in electrical and electronic

equipment (RoHS). The Waste Electrical and Electronic Equipment Directive (WEEE) aims to minimise the impacts of electrical and electronic equipment on the environment during their life times and when they become waste. All products manufactured by Sonifex Ltd have the WEEE directive label placed on the case. Sonifex Ltd will be happy to give you information about local organisations that can reprocess the product when it reaches its "end of use", or alternatively all products that have reached "end of use" can be returned to Sonifex and will be reprocessed correctly free of charge.

Atmosphere/Environment

This apparatus should be installed in an area that is not subject to excessive temperature variation (<0°C, >50°C), moisture, dust or vibration.

This apparatus shall not be exposed to dripping or splashing, and no objects filled with water, such as vases shall be placed on the apparatus.

Fitting Redboxes

Redboxes can be fixed to the underside of a desk, or other surfaces using 4.2mm holes in the sides and fixed with 2 x M4 screws or 2 x No. 6 countersink wood screws.

Fig A: RB-RK1 Small Redbox Front Rack-mount Kit.

Safety & Installation

They can also be rack-mounted, with either the front, or rear of the Redbox positioned at the front of the rack (Note: this product is front rack-mounted as standard):

Front Mounting Redboxes: For rack mounting smaller (28cm) units the optional RB-RK1 (Red) or RB-RK1B (Black) kit can be used (which include 4 off M6 panel fixing screws).

Rear Mounting a Redbox: For rear panel mounting you can use either the RB-RK2 (in this case), or RB-RK3, depending on the size of your Redbox.

Fig B: RB-RK2 Small Redbox Rear Rack-mount Kit.

Fig C: RB-RK3 Large Redbox Rear Rack-mount Kit.

1 RB-UL1 Single Stereo Unbalanced to Balanced Converters

Introduction

Fig 1-1: RB-UL1 Front Panel

The RB-UL1 single stereo unit is used for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels.

All connections are on the rear panel. The RCA unbalanced inputs have an impedance of 10kΩ bridging and are routed to the balanced XLR-3 outputs with an output impedance of <50Ω.

The RB-UL1 has two inputs & outputs.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. A LED power indicator on the front panel displays the power supply connection.

System Block Diagram

Rear Panel Connections and Operation

RCA Phono Inputs (Left and Right)

The stereo left and right RCA inputs are unbalanced and have an impedance of 10kΩ. They are routed to the stereo balanced XLR 3 pin output connectors.

Outputs (Left and Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50Ω. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

graph LR
    A["Left Input Consumer/Unbalanced"] --> B["Phono"]
    C["Right Input Consumer/Unbalanced"] --> D["Phono"]
    B --> E["Gain"]
    D --> F["Gain"]
    E --> G["Left Output Professional/Balanced"]
    F --> H["Right Output Professional/Balanced"]

Fig 1-2: RB-UL1 System Block Diagram

1 Matching Converters - RB-UL1

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain range of the unbalanced to balanced converter is -15dBu to +15dBu ref -15dBu into the unbalanced input.

Fig 1-3: RB-UL1 Rear Panel

Technical Specifications RB-UL1

Audio Specifications

Maximum Input Level: +28dBu

Input Impedance: >10kΩ

Output Impedance: <50Ω

Maximum Output Level: +28dBu

Distortion: 0.01% THD @ 1kHz ref +8dB output

Noise: -100dB unity gain, ref +8dB output

Common Mode Rejection: >66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range:

Balanced output: -15dBu to 15dBu, ref -15dBu into unbalanced RCA input

Connections

Inputs:

2 x RCA phono (unbalanced)

Outputs:

2 x XLR 3 pin male (balanced)

Mains Input:	Filtered IEC, 110V-120V, or 220-240V
switchable, fused, 6W maximum

Fuse Rating:	Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-UL1: Single stereo unbalanced to balanced converter
	RR1 RR2

Physical Specifications:

Dimensions (Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)

11" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 36cm (W) x 20.5cm (D) x 6cm (H)

14.2" (W) x 8" (D) x 2.4" (H)

Weight:

Nett: 1.00kg Gross: 1.45kg

Nett: 2.2lbs Gross: 3.2lbs

2 RB-UL2 Dual Stereo Unbalanced To Balanced Converters

Introduction

Fig 2-1: RB-UL2 Front Panel

The RB-UL2 dual stereo unit is used for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels.

All connections are on the rear panel. The RCA unbalanced inputs have an impedance of 10kΩ bridging and are routed to the balanced XLR-3 outputs with an output impedance of <50Ω.

The RB-UL2 has four inputs & outputs.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. A LED power indicator on the front panel displays the power supply connection.

System Block Diagram

Rear Panel Connections and Operation

RCA Phono Inputs (Left and Right)

The stereo left and right RCA inputs are unbalanced and have an impedance of 10k . They are routed to the stereo balanced XLR 3 pin output connectors.

Outputs (Left and Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50Ω. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

graph LR
    A["Left Input Consumer/Unbalanced"] --> B["Phono"]
    C["Right Input Consumer/Unbalanced"] --> D["Phono"]
    B --> E["Gain"]
    D --> F["Gain"]
    E --> G["Left Output Professional/Balanced"]
    F --> H["Right Output Professional/Balanced"]

Fig 2-2: RB-UL2 System Block Diagram

2 Matching Converters - RB-UL2

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain range of the unbalanced to balanced converter is -15dBu to +15dBu ref -15dBu into the unbalanced input.

Technical Specifications RB-UL2

Audio Specifications

Maximum Input Level: +28dBu

Input Impedance: >10kΩ

Output Impedance:

<50Ω

Maximum Output Level: +28dBu

Distortion: 0.01% THD @ 1kHz ref +8dB output

Noise: -100dB unity gain, ref +8dB output

Common Mode Rejection:

>66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range: Balanced output: -15dBu to 15dBu, ref -15dBu

into unbalanced RCA input

Fig 2-3: RB-UL2 Rear Panel
Equipment Type

RB-UL2:

RK1

RK2

Dual stereo unbalanced to balanced converter

Physical Specifications:

Dimensions (Raw):	28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
11" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed):	36cm (W) x 20.5cm (D) x 6cm (H)
14.2" (W) x 8" (D) x 2.4" (H)

Weight:

Nett: 1.05kg Gross: 1.5kg

Nett: 2.3lbs

Gross: 3.3lbs

Connections

Inputs: 4 x RCA phono (unbalanced)

Outputs: 4 x XLR 3 pin male (balanced)

Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused, 6W maximum

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)

Anti-surge fuse 250mA 20 x 5mm (115VAC)

3 RB-UL4 Quad Stereo Unbalanced to Balanced Converters

Introduction

Fig 3-1: RB-UL4 Front Panel

The RB-UL4 quad stereo unit is used for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels.

All connections are on the rear panel. The RCA unbalanced inputs have an impedance of 10kΩ bridging and are routed to the balanced XLR-3 outputs with an output impedance of <50Ω.

The RB-UL4 has eight inputs & outputs.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. A LED power indicator on the front panel displays the power supply connection.

System Block Diagram

Rear Panel Connections and Operation

RCA Phono Inputs (Left and Right)

The stereo left and right RCA inputs are unbalanced and have an impedance of 10k . They are routed to the stereo balanced XLR 3 pin output connectors.

Outputs (Left and Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50Ω. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

graph LR
    A["Left Input Consumer/Unbalanced"] --> B["Phono"]
    C["Right Input Consumer/Unbalanced"] --> D["Phono"]
    B --> E["Gain"]
    D --> F["Gain"]
    E --> G["Left Output Professional/Balanced"]
    F --> H["Right Output Professional/Balanced"]

Fig 3-2: RB-UL4 System Block Diagram

3 Matching Converters - RB-UL4

Fig 3-3: RB-UL4 Rear Panel

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain range of the unbalanced to balanced converter is -15dBu to +15dBu ref -15dBu into the unbalanced input.

Technical Specifications RB-UL4

Audio Specifications

Maximum Input Level: +28dBu

Input Impedance: >10kΩ

Output Impedance: <50Ω

Maximum Output Level: +28dBu

Distortion: 0.01% THD @ 1kHz ref +8dB output

Noise: -100dB unity gain, ref +8dB output

Common Mode Rejection:

66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range: Balanced output: -15dBu to 15dBu, ref -15dBu into unbalanced RCA input

Connections

Inputs: 8 x RCA phono (unbalanced)

Outputs: 8 x XLR 3 pin male (balanced)

Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused, 6W maximum

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC) Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-UL4: RK3 Quad stereo unbalanced to balanced converter

Physical Specifications:

Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm (H) 21" (W) x 8" (D) x 2.4" (H)

Weight: Nett: 1.3kg Gross: 1.9kg Nett: 2.9lbs Gross: 4.2lbs

4 RB-LU4 Quad Stereo Balanced to Unbalanced Converter

Introduction

Fig 4-1: RB-LU4 Front Panel

The RB-LU4 is a quad stereo unit for interfacing professional balanced equipment to domestic, or semi-pro unbalanced line levels.

All connections are on the rear panel. The eight XLR-3 electronically balanced inputs have an impedance of 20kΩ bridging and are routed to eight unbalanced RCA phono outputs with an output impedance of <50Ω.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. An LED power indicator is situated on the front panel, which displays the power supply connection.

4 Matching Converters - RB-LU4

System Block Diagram

graph LR
    A["Left Input 1 Professional/Balanced"] --> B["Phono Left Output 1 Consumer/Unbalanced"]
    C["Right Input 1 Professional/Balanced"] --> D["Phono Right Output 1 Consumer/Unbalanced"]
    E["Left Input 2 Professional/Balanced"] --> F["Phono Left Output 2 Consumer/Unbalanced"]
    G["Right Input 2 Professional/Balanced"] --> H["Phono Right Output 2 Consumer/Unbalanced"]
    I["Left Input 3 Professional/Balanced"] --> J["Phono Left Output 3 Consumer/Unbalanced"]
    K["Right Input 3 Professional/Balanced"] --> L["Phono Right Output 3 Consumer/Unbalanced"]
    M["Left Input 4 Professional/Balanced"] --> N["Phono Left Output 4 Consumer/Unbalanced"]
    O["Right Input 4 Professional/Balanced"] --> P["Phono Right Output 4 Consumer/Unbalanced"]
    B --> Q["Gain"]
    D --> R["Gain"]
    F --> S["Gain"]
    H --> T["Gain"]
    J --> U["Gain"]
    L --> V["Gain"]
    N --> W["Gain"]
    P --> X["Gain"]

Fig 4-2: RB-LU4 System Block Diagram

Rear Panel Connections and Operation

Fig 4-3: RB-LU4 Rear Panel

Inputs 1-4 (Left and Right)

The XLR 3 pin sockets used for the left and right channel inputs of Input 1 are electronically balanced and have an impedance of 20kΩ bridging. They are routed to an unbalanced RCA (phono) output with an output impedance of <50Ω. Each XLR has the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

RCA Phono Outputs 1-4 (Left and Right)

These RCA (phono) outputs are unbalanced and have an output impedance of <50 .

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain of the balanced to unbalanced converter is variable within a range of -28dBu to +15dBu ref. -15dBu into the balanced input.

Technical Specifications RB-LU4

Audio Specifications

Maximum Input Level: +28dBu

Input Impedance (XLR): >20kΩ balanced bridging

Output Impedance (RCA) : <50Ω

Maximum Output Level: +22dBu

Distortion: 0.01% THD @ 1kHz, ref +8dBu output

Noise: -100dB, unity gain, ref +8dBu output

Common Mode Rejection: >66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range: Unbalanced Output: -28dBu to +15dBu, ref -15dBu into balanced XLR input

Connections

Inputs: 8 x XLR 3 pin female (Balanced)

Outputs: 8 x RCA phono (Unbalanced)

Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused, 6W maximum

4 Matching Converters - RB-LU4

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC) Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-LU4: Quad storage balanced to unbalanced converter

Physical Specifications

Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm (H) 21" (W) x 8" (D) x 2.4" (H)

Weight: Nett: 1.3kg Gross: 1.9kg Nett: 2.9lbs Gross: 4.2lbs

5 RB-BL2 Single Bi-Directional Matching Converter

Introduction

Fig 5-1: RB-BL2 Front Panel

The RB-BL2 is a bi-directional stereo unit for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels, and vice-versa.

All connections are on the rear panel. The XLR-3 electronically balanced inputs have an impedance of 20kΩ bridging and are routed to unbalanced RCA (phono) outputs with an output impedance of <50Ω.

The RCA unbalanced inputs have an impedance of 10kΩ bridging and are routed to balanced XLR-3 outputs with an output impedance of <50Ω.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. An LED power indicator on the front panel displays the power supply connection.

System Block Diagram

graph LR
    A["Left Input 1 Professional/Balanced"] --> B["Phono"]
    C["Right Input 1 Professional/Balanced"] --> D["Phono"]
    E["Left Input 2 Consumer/Unbalanced"] --> F["Phono"]
    G["Right Input 2 Consumer/Unbalanced"] --> H["Phono"]
    B --> I["Gain"]
    D --> J["Gain"]
    F --> K["Gain"]
    H --> L["Gain"]
    I --> M["Left Output 1 Consumer/Unbalanced"]
    J --> N["Right Output 1 Consumer/Unbalanced"]
    K --> O["Left Output 2 Professional/Balanced"]
    L --> P["Right Output 2 Professional/Balanced"]

Fig 5-2: RB-BL2 System Block Diagram

5 Matching Converters - RB-BL2

Rear Panel Connections and Operation

Fig 5-3: RB-BL2 Rear Panel

Balanced to Unbalanced Connections

Inputs 1 (Left & Right)

The XLR 3 pin sockets used for the left and right channel signals of Input 1 are electronically balanced and have an impedance of 20kΩ bridging. They are routed to unbalanced RCA (phono) outputs with an output impedance of <50Ω. Each XLR has the following connections:

Pin 1: Screen.

Pin 2: Phase.

Pin 3: Non-phase.

RCA Phono Outputs 1 (Left & Right)

These RCA (phono) outputs are unbalanced and have an output impedance of <50 .

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain of the balanced to unbalanced converter is variable within a range of 0dBu to -28dBu ref -0dBu into the balanced input.

Unbalanced to Balanced Connections

RCA Phono Inputs 2 (Left & Right)

The left and right RCA inputs 2 are unbalanced and have an impedance of 10kΩ.

They are routed to the balanced XLR 3 pin outputs 2.

Outputs 2 (Left & Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50Ω. They have the following connections:

Pin 1: Screen.

Pin 2: Phase.

Pin 3: Non-phase.

Technical Specifications RB-BL2

Audio Specifications

Maximum Input Level: +28dBu

Maximum Output Level: +28dBu

Input Impedance (RCA) : >10kΩ unbalanced

Input Impedance (XLR): >20kΩ balanced bridging

Output Impedance (RCA) : <50Ω

Output Impedance (XLR): <50Ω

Distortion: 0.01% THD @ 1kHz, ref +8dBu output

Noise: -100dB, unity gain, ref +8dBu output

Common Mode Rejection:> 66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range: Unbalanced Output: -28dBu to +15dBu, ref -15dBu into balanced XLR input

Gain Range: Balanced Output: -15dBu to +15dBu, ref -15dBu into unbalanced RCA input

Connections

Inputs: 2 x XLR 3 pin female

(balanced),

2 x RCA phono (unbalanced)

Outputs: 2 x XLR 3 pin male (balanced),

2 x RCA phono (unbalanced)

Mains Input:

Filtered IEC, 110V-120V, or 220-240V

switchable, fused, 6W maximum

Fuse Rating:

Anti-surge fuse 100mA 20 x 5mm (230VAC)

Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-BL2:

Single stereo bi-directional matching converter

Physical Specification

Dimensions (Raw):

28cm (W) × 10.8cm (D) × 4.2cm (H) (1U)

6 RB-BL4 Dual Stereo Bi-Directional Matching Converter

Introduction

Fig 6-1: RB-BL4 Front Panel

The RB-BL4 is a dual bi-directional stereo unit for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels, and vice-versa.

All connections are on the rear panel. The XLR-3 electronically balanced inputs have an impedance of 20kΩ bridging and are routed to unbalanced RCA (phono) outputs with an output impedance of <50Ω.

System Block Diagram

graph LR
    A["Left Input 1 Professional/Balanced"] --> B["Phono"]
    C["Right Input 1 Professional/Balanced"] --> D["Phono"]
    E["Left Input 2 Consumer/Unbalanced"] --> F["Phono"]
    G["Right Input 2 Consumer/Unbalanced"] --> H["Phono"]
    B --> I["Gain"]
    D --> J["Gain"]
    F --> K["Gain"]
    H --> L["Gain"]
    I --> M["Phono"]
    J --> N["Phono"]
    K --> O["Phono"]
    L --> P["Phono"]
    M --> Q["Left Output 1 Consumer/Unbalanced"]
    N --> R["Left Output 2 Professional/Balanced"]
    O --> S["Right Output 1 Consumer/Unbalanced"]
    P --> T["Right Output 2 Professional/Balanced"]

Fig 6-2: RB-BL4 System Block Diagram. (Note the RB-BL4 contains 2 of these circuits)

Rear Panel Connections and Operation

Fig 6-3: RB-BL4 Rear Panel

Balanced to Unbalanced Connections

Inputs 1 & 3 (Left & Right)

The XLR 3 pin sockets used for the left and right channel signals of Inputs 1 & 3 are electronically balanced and have an impedance of 20k bridging. They are routed to unbalanced RCA (phono) outputs with an output impedance of <50 . Each XLR has the following connections:

Pin 1: Screen.

Pin 2: Phase.

Pin 3: Non-phase.

RCA Phono Outputs 1 & 3 (Left & Right)

These RCA (phono) outputs are unbalanced and have an output impedance of <50 .

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain of the balanced to unbalanced converter is variable within a range of 0dBu to -28dBu ref -0dBu into the balanced input.

6 Matching Converters - RB-BL4

Unbalanced to Balanced Connections

RCA Phono Inputs 2 & 4 (Left & Right)

The left and right RCA inputs 2 & 4 are unbalanced and have an impedance of 10kΩ. They are routed to the balanced XLR 3 pin outputs 2 & 4.

Outputs 2 & 4 (Left & Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50 . They have the following connections:

Pin 1: Screen.

Pin 2: Phase.

Pin 3: Non-phase.

Technical Specifications RB-BL4

Audio Specifications

Maximum Input Level: +28dBu

Maximum Output Level: +28dBu

Input Impedance (RCA) : >10kΩ unbalanced

Input Impedance (XLR) : >20kΩ balanced bridging

Output Impedance (RCA) : <50Ω

Output Impedance (XLR) : <50Ω

Distortion: 0.01% THD @ 1kHz, ref +8dBu output

Noise: -100dB, unity gain, ref +8dBu output

Common Mode Rejection: >66dB typically

Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)

Gain Range: Unbalanced Output: -28dBu to +15dBu, ref -15dBu into balanced XLR input

Gain Range: Balanced Output: -15dBu to +15dBu, ref -15dBu into unbalanced RCA input

Connections

Inputs: 4 x XLR 3 pin female (balanced),4 x RCA phono (unbalanced)

Outputs: 4 x XLR 3 pin male (balanced),4 x RCA phono (unbalanced)

Mains Input: Filtered IEC, 110V-120V, or 220-240Vswitchable, fused, 6W maximum

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-BL4:

PK3

Dual stereo bi-directional matching converter

Physical Specification

Dimensions (Raw)	48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19" (W) x 4.3" (D) x 1.7" (H) (1U)
Dimensions (Boxed)	53cm (W) x 20.5cm (D) x 6cm (H)
21" (W) x 8" (D) x 2.4" (H)
Weight	Nett: 1.3kg Gross: 1.9kg
	Nett: 2.9lbs Gross: 4.2lbs

The RCA unbalanced inputs have an impedance of 10kΩ bridging and are routed to balanced XLR-3 outputs with an output impedance of <50Ω.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. An LED power indicator on the front panel displays the power supply connection.

7 RB-PA2 Dual Stereo RIAA Phono Amplifier

Introduction

Fig 7-1: RB-PA2 Front Panel

The RB-PA2 is a dual stereo RIAA equalised phono amplifier. This record player preamp amplifies the small signal from your pick up cartridge (either moving magnet or high output moving coil magnetic) and provides the necessary RIAA equalisation required for vinyl records, to match it to a line input of your mixer, or amplifier. It uses a clean RIAA response making it ideal for use with broadcast turntables and DJ decks and where vinyl records are being archived to CD for high quality transfers, or for converting albums to mp3.

It operates with phono cartridges with a nominal output of 1mV to 25mV and has been specifically tested to work with the Technics SL-1200 ^™ and 1210 ^™ range of turntables. Quality high specification components have

been used together with low noise, fast acting operational amplifiers to produce a superbly transparent signal path. Additionally, the RB-PA2 runs without a rumble filter to produce a powerful bass response.

The RB-PA2 is a dual stereo unit to interface up to two turntables. The inputs are phono connectors with Neutrik XLR connectors for the balanced outputs, which may be wired unbalanced if required. Output gain is individually adjustable for left and right channels in the range 35dB to 65dB by using pre-set potentiometers. Frequency response is held within 0.5dB of the RIAA curve and noise is typically better than -84dB RMS A weighted at 40dB gain.

System Block Diagram

graph LR
    A["Left Input Phono"] --> B["Phono"]
    B --> C["RIAA"]
    C --> D["Gain"]
    D --> E["Right Input Phono"]
    E --> F["RIAA"]
    F --> G["Gain"]
    G --> H["Right Output Professional/Balanced"]
    style A fill:#f9f,stroke:#333
    style E fill:#f9f,stroke:#333

Fig 7-2: RB-PA2 System Block Diagram For a Single Stereo Channel

7 Matching Converters - RB-PA2

Rear Panel Connections and Operation

Fig 7-3: RB-PA2 Rear Panel

RCA Phono Inputs (Left and Right)

The stereo left and right RCA inputs are unbalanced and have an impedance of 47kΩ. They are routed to the stereo balanced XLR 3 pin output connectors.

Outputs (Left and Right)

The XLR 3 pin output plug connectors are electronically balanced with an output impedance of <50Ω. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Output Level Adjustment

The output gain can be individually adjusted for left and right channels through pre-set potentiometers which are accessible through the rear panel. The gain range of each channel is adjustable between 30dB gain and 58dB gain.

Pick-up Grounding Post

This acts as an earth ground connection to connect to a turntable pick-up ground point.

Technical Specifications RB-PA2

Audio Specifications

Maximum Input Level: +28dBu

Input Impedance: >47kΩ

Input Sensitivity Range: 1mV to 25mV (ref 1kHz)

Maximum Output Level: +28dBu

Output Impedance: <50Ω

Output Gain Range: Adjustable 38dB to 58dB gain via 4 multi-turn pots

Crosstalk: Better than -80dBu at 1kHz

Frequency Response: 10Hz-150kHz (-3dB)

RIAA Accuracy: Within 0.5dB of RIAA curve

Distortion: 0.01% THD @ 1kHz, ref +8dBu output

Noise: -77dB (CCIR Q-Pk, 20Hz-20kHz)

Headroom: 27dB for 3mV input

Dynamic Range: 90dB

Connections

Inputs: 4 x RCA phono (unbalanced)

Outputs: 4 x XLR 3 pin male (balanced)

Earth Tag: Grounding turret tag

Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused 6W maximum

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC) Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-PA2:

Dual stereo phono amplifier and RIAA gram amplifier

Physical Specifications

Dimensions (Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 11" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 36cm (W) x 20.5cm (D) x 6cm (H) 14.2" (W) x 8" (D) x 2.4" (H)

Weight:

Nett: 1.1kg Gross: 1.5kg Nett: 2.4lbs Gross: 3.3lbs

8 Matching Converters - RB-LI2

8 RB-LI2 Stereo Line Isolation Unit

Introduction

Fig 8-1: RB-LI2 Front Panel.

The RB-LI2 stereo line isolation unit is used to isolate audio signals from inter area ground hum loops, which could be caused by equipment being powered by different mains power supplies, or different phases on the same supply. The input and output are connected together through a transformer, which has internal jumpers allowing the outputs to be balanced about ground.

There is also a loop-through output, so that the RB-LI2 can be inserted into a line, forming a transformer balanced distribution point.

This unit is useful where audio is required to be driven over a relatively long length of cable. By isolating the signal using transformers, ground loop currents that can be present in non-isolated signals, are eradicated completely.

System Block Diagram

graph LR
    A["Input"] --> B["Transformer Balanced Mode"]
    C["Loop Output"] --> B
    B --> D["Gain"]
    D --> E["Ground Link Jumper"]
    E --> F["Isolated Output"]
    style B fill:#f9f,stroke:#333
    style E fill:#ccf,stroke:#333

Fig 8-2: RB-LI2 System Block Diagram

Rear Panel Connections and Operation

Fig 8-3: RB-LI2 Rear Panel

Inputs

There are 2 input XLR 3 pin sockets. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Isolated Outputs

Each of the 2 inputs has a corresponding isolated output, an XLR 3 pin plug with the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Loop Outputs

Each of the 2 inputs has a corresponding loop-through output, an XLR 3 pin plug with the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Output Level Adjustment

The isolated outputs can be individually adjusted using pre-set potentiometers, which are accessible through the rear panel. The gain range of the stereo line isolation unit is -15dB to +13.5dB (28.5dB).

Internal Jumpers

The unit has jumpers that are used to balance the output about ground. By default these are not fitted when the unit leaves the factory.

To get inside the RB-LI2, first ensure that it has been disconnected from the mains power and that the mains IEC lead to the unit has been removed. Observing anti-static precautions, undo the four-crosshead screws on the back panel at the far left and far right of the panel (2 at each end). Also undo the small brass screws, which hold the top and bottom panels to the rear panel. The rear panel should slide backwards out of the unit together with the main circuit board.

8 Matching Converters - RB-LI2

Fig 8-4: RB-LI2 Jumper Positions on the PCB

Technical Specifications RB-LI2

Audio Specification

Output Impedance: <150Ω

Frequency Response: 10Hz to 36kHz ±0.5dB

Common Mode Rejection:<64dB

Distortion: 0.5% THD @ 40Hz, ref +17dBu output

Noise: -100dB unity gain ref +8dB

Gain Range: -15dB to +13.5dB (28.5dB)

Connections

Inputs: 2 x XLR 3 pin female

Isolated Outputs: 2 x XLR 3 pin male

Loop Outputs: 2 x XLR 3 pin male

Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)

Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-LI2: Stereoline isolation unit

Physical Specifications

Dimensions (Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 11" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 36cm (W) x 20.5cm (D) x 6cm (H) 14.2" (W) x 8" (D) x 2.4" (H)

Weight: Nett: 1.1kg Gross: 1.5kg

Nett: 2.4lbs Gross: 3.3lbs

9 RB-PLI6 6 Way Mono Passive Line Isolation Unit

Introduction

Fig 9-1: RB-PLI6 Front Panel

The RB-PLI6 6 way mono passive line isolation unit is used to isolate audio signals from inter area ground hum loops, which could be caused by equipment being powered by different mains power supplies or phases on the same supply.

The input and output are connected together through a transformer and the unit has internal jumpers allowing the inputs and/or outputs to be balanced about ground. The unit requires no mains power for operation.

This unit is useful where audio is required to be driven over a relatively long length of cable. By isolating the signal using transformers, ground loop currents that can be present in non-isolated signals, are eradicated completely.

System Block Diagram

Fig 9-2: RB-PLI6 System Block Diagram

9 Matching Converters - RB-PLI6

Rear Panel Connections and Operation

Fig 9-3: RB-PLI6 Rear Panel

Inputs

Inputs

There are 6 off XLR 3 pin socket inputs. They have the following

connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Outputs

There are 6 off XLR 3 pin plug outputs. They have the following connections:

Pin 1: Screen

Pin 2: Phase

Pin 3: Non-phase

Ground-link Internal Jumpers

The unit has jumpers that are used to balance either the input, or the output, about ground. By default these are not fitted when the unit leaves the factory.

To get inside the RB-PLI6, observing anti-static precautions, undo the four crosshead screws on the back panel at the far left and far right of the panel (2 at each end). Also undo the small brass screws, which hold the top and bottom panels to the rear panel. The rear panel should slide backwards out of the unit together with the main circuit board.

Fig 9-4: RB-PL16 Ground-link Jumper Settings

Technical Specifications RB-PLI6

Audio Specification

Output Impedance: <150Ω

Distortion: 0.5% THD @ 40Hz, ref +17dBu output

Common Mode Rejection:<64dB typically

Frequency Response: 10Hz to 36kHz ±0.5dB

Connections

Inputs: 6 x XLR 3 pin female (balanced)

Outputs: 6 x XLR 3 pin male (balanced)

Equipment Type

RB-PLI6: 6-wa mono passive line isolation unit

Physical Specifications

Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19" (W) x 4.3" (D) x 1.7" (H) (1U)

Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm (H) 21" (W) x 8" (D) x 2.4" (H)

Weight: Nett: 1.5kg Gross: 1.9kg Nett: 3.3lbs Gross: 4.2lbs

SONIFEX

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