PSA-125A4C - Audio Equipment Showtec - Free user manual and instructions

Product Type	Power Amplifier
Model	PSA-125A4C
Brand	Showtec
Number of Channels	4
Output Power (per channel)	125W RMS at 4 ohms
Total Output Power	500W RMS (all channels driven)
Frequency Response	20 Hz - 20 kHz (±0.5 dB)
Total Harmonic Distortion (THD)	< 0.05%
Signal-to-Noise Ratio	> 100 dB
Input Sensitivity	0.775V / 1.4V selectable
Input Impedance	20 kΩ (balanced), 10 kΩ (unbalanced)
Input Connectors	XLR, ¼" TRS, RCA (per channel)
Output Connectors	Binding posts, SpeakON (per channel)
Cooling	Variable speed fan, front-to-rear airflow
Protection Features	Short circuit, thermal, overload, DC offset, soft start
Power Supply	100-240V AC, 50/60 Hz
Power Consumption	800 VA maximum
Dimensions (W x H x D)	483 x 88 x 300 mm (19" rackmount, 2U)
Weight	5.0 kg
Front Panel Indicators	Power, Signal, Clip, Protect (per channel)
Front Panel Controls	Volume knobs (per channel), power switch
Rear Panel Features	Ground lift switch, mode selector (stereo/parallel/bridge)
Operating Temperature	0°C to 40°C
Accessories Included	Power cord, user manual, rackmount ears

Frequently Asked Questions - PSA-125A4C Showtec

What is the power output of the Showtec PSA-125A4C?

The amplifier delivers 125W RMS per channel at 4 ohms, for a total of 500W RMS when all four channels are driven.

How do I connect speakers to this amplifier?

Use the SpeakON or binding post outputs on the rear panel. Ensure the speaker impedance is 4 ohms or higher per channel.

What input connectors does the PSA-125A4C have?

Each channel has balanced XLR, unbalanced ¼" TRS, and RCA inputs. Use balanced connections for longer cable runs to reduce noise.

Can I bridge channels for more power?

Yes, the amplifier supports bridging. Use the mode selector on the rear panel to set it to bridge mode, then connect the speaker to the bridged output terminals. Ensure the load is 8 ohms minimum in bridge mode.

What does the 'Protect' LED indicate?

The Protect LED lights up when the amplifier detects a fault such as short circuit, overheating, or DC offset. The amplifier will mute until the fault is resolved.

What are the dimensions and weight of this amplifier?

The dimensions are 483 x 88 x 300 mm (standard 19-inch rackmount, 2U height), and it weighs approximately 5.0 kg.

Can I use this amplifier with a UPS or generator?

Yes, the amplifier has a universal power supply accepting 100-240V AC, 50/60 Hz. Ensure the power source can provide at least 800 VA.

How do I clean and maintain the PSA-125A4C?

Disconnect power before cleaning. Use a dry, soft cloth to wipe the exterior. Avoid liquids to prevent electrical damage. Periodically check the air intake and fan for dust buildup.

What is the frequency response of this amplifier?

The frequency response is 20 Hz to 20 kHz with a tolerance of ±0.5 dB, suitable for full-range audio applications.

Does the amplifier include rackmount brackets?

Yes, the amplifier comes with rackmount ears attached. They can be removed for non-rack installations if needed.

USER MANUAL PSA-125A4C Showtec

ENGLISH

PSA-125A4C

V2

Product code: 50667

Preface

Thank you for purchasing this Showgear product.

The purpose of this user manual is to provide instructions for the correct and safe use of this product.

Keep the user manual for future reference as it is an integral part of the product. The user manual shall be stored at an easily accessible location.

This user manual contains information concerning:

• Safety instructions
  • Installation and operation of the device
• Intended and non-intended use of the device
• Maintenance procedures
• Troubleshooting
• Transport, storage and disposal of the device

Non-observance of the instructions in this user manual may result in serious injuries and damage of property.

©2021 Showgear. All rights reserved.

No part of this document may be copied, published or otherwise reproduced without the prior written consent of Highlite International.

Design and product specifications are subject to change without prior notice.

For the latest version of this document or other language versions, please visit our website www.highlite.com or contact us at [e-mail].

Highlite International and its authorized service providers are not liable for any injury, damage, direct or indirect loss, consequential or economic loss or any other loss arising from the use of, or inability to use or reliance on the information contained in this document.

Table of contents

1. Introduction......3

1.1. Before Using the Product ....3
1.2. Intended Use 3
1.3. Text Conventions ...... 3
1.4. Symbols and Signal Words....4
1.5. Symbols on the Information Label 4

2. Safety 5

2.1. Warnings and Safety Instructions ....5

2.2. Requirements for the User....7

3. Description of the Device 8

3.1. Front View 8
3.2. Back View 9
3.3. Product Specifications ....10
3.4. Dimensions....10

4. Installation....11

4.1. Safety Instructions for Installation ....11
4.2. Installation Site Requirements ....11
4.3. Rack Mounting .....11
4.4. Connecting to Power Supply....11
4.4.1. Schematic Overview 12

5. Setup and Operation ....12

5.1. Warnings and Precautions ....12
5.2. Safety Instructions for Operation....12
5.3. Start-up....13

6. Troubleshooting 13

7. Maintenance ....13

7.1. Safety Instructions for Maintenance....13
7.2. Preventive Maintenance....13
7.2.1. Basic Cleaning Instructions....14
7.3. Corrective Maintenance....14

8. Deinstallation, Transportation and Storage ....14

9. Disposal 14

10. Approval....14

1. Introduction

1.1. Before Using the Product

Important
Read and follow the instructions in this user manual before installing, operating or servicing this product.

The manufacturer will not accept liability for any resulting damages caused by the non-observance of this manual.

After unpacking, check the contents of the box. If any parts are missing or damaged, contact your Highlite International dealer.

Your shipment includes:

• Showgear PSA-125A4C
- User manual

Fig. 01

1.2. Intended Use

This device is intended for professional use as a 3-phase power distribution unit in theaters, entertainment facilities, public venues, and similar. It is suitable only for indoor use. This device is not suitable for households and residential buildings.

This device is designed for use in environment B.

Any other use, not mentioned under intended use, is regarded as non-intended and incorrect use.

1.3. Text Conventions

Throughout the user manual the following text conventions are used:

• Buttons: All buttons are in bold lettering, for example "Press the UP/DOWN buttons"
• References: References to chapters and parts of the device are in bold lettering, for example: "Refer to 2. Safety", "turn the adjustment screw (02)"
  • 0–255: Defines a range of values
  Notes: Note: (in bold lettering) is followed by useful information or tips

1.4. Symbols and Signal Words

Safety notes and warnings are indicated throughout the user manual by safety signs.

Always follow the instructions provided in this user manual.

DANGER	Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING	Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION	Indicates a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury.
Attention	Indicates important information for the correct operation and use of the product.

Important Read and observe the instructions in this document.

Electrical hazard

Provides important information about the disposal of this product.

1.5. Symbols on the Information Label

This product is provided with an information label. The information label is located on the backside of the device.

The information label contains the following symbols:

This device is designed for indoor use.

This device falls under IEC protection class I.

This device shall not be treated as household waste.

Read and follow the instructions in the user manual before installing, operating or servicing the device.

Caution: Risk of electric shock. Do not open. Caution: To reduce the risk of electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified personnel.

2. Safety

Important Read and follow the instructions in this user manual before installing, operating or servicing this product.

The manufacturer will not accept liability for any resulting damages caused by the non-observance of this manual.

2.1. Warnings and Safety Instructions

DANGER Electric shock caused by dangerous voltage inside

• Do not open the device or remove any covers.
• Do not operate the device if the covers or the housing are open. Before operation, check if the housing is firmly closed and all screws are tightly fastened.
• Disconnect the device from electrical power supply before service and maintenance.

DANGER Electric shock caused by short-circuit

This device falls under IEC protection class I.

• Make sure that the device is electrically connected to ground (earth). Connect the device only to a socket-outlet with ground (earth) connection.
• Do not cover the ground (earth) connection.
• Do not bypass the thermostatic switch or fuses.
• Do not let the power cable come into contact with other cables. Handle the power cable and all connections with the mains with caution.
• Do not modify, bend, mechanically strain, put pressure on, pull or heat up the power cable.
• Make sure that the power cable is not crimped or damaged. Examine the power cable periodically for any defects.
• Do not immerse the device in water or other liquids. Do not install the device in a location where flooding may occur.

Attention Power supply

• Before connecting the device to the power supply, make sure that the current, voltage and frequency match the input voltage, current and frequency specified on the information label on the device.
• Make sure that the cross-sectional area of the extension cords and power cables is sufficient for the required power consumption of the device.

Attention
General safety

• Do not shake the device. Avoid brute force when installing or operating the device.
• If the device is dropped or struck, disconnect the device from the electrical power supply immediately.
• If the device is exposed to extreme temperature variations (e.g. after transportation), do not switch it on immediately. Let the device reach room temperature before switching it on, otherwise it may be damaged by the formed condensation.
• If the device fails to work properly, discontinue the use immediately.

Attention
For professional use only
This device shall be used only for the purposes it is designed for.

This device is intended for professional use as a 3-phase power distribution unit in theaters, entertainment facilities, public venues, and similar. Any incorrect use may lead to hazardous situations and result in injuries and material damage.

• This device is not suitable for households and residential buildings.
- This device does not contain user-serviceable parts. Unauthorized modifications to the device will render the warranty void. Such modifications may result in injuries and material damage.

Attention
Before use, examine the device visually for any defects.

Make sure that:

• All screws used for installing the device or parts of the device are tightly fastened and are not corroded.
• There are no deformations on housings, fixations and installation points.
• The power cables are not damaged and do not show any material fatigue.

Attention
Do not expose the device to conditions that exceed the rated IP class conditions.

This device is IP20 rated. IP (Ingress Protection) 20 class provides protection against solid objects greater than 12 mm, such as fingers, and no protection against harmful ingress of water.

2.2. Requirements for the User

DANGER

This product may not be used by ordinary persons.

This product may be used only by instructed or skilled persons. Installation and maintenance can be carried out by instructed or skilled persons. Service shall be carried out only by skilled persons. Contact your Highlite International dealer for more information.

Instructed persons have been instructed and trained by a skilled person, or are supervised by a skilled person, for specific tasks and work activities associated with the installation, service and maintenance of this product, so that they can identify risks and take precautions to avoid them.

Skilled persons have training or experience, which enables them to recognize risks and to avoid hazards associated with the installation, service and maintenance of this product.

Ordinary persons are all persons other than instructed persons and skilled persons. Ordinary persons include not only users of the product but also any other persons that may have access to the device or who may be in the vicinity of the device.

3. Description of the Device

The PSA-125A4C is a 3-phase power distribution unit, providing real-time voltage and amperage information during your show. It has 4 5-pin CEE outputs and a 5-pin CEE input. The maximum allowed current load is 125 A per phase. The maximum allowed current load per output is 3 x 63 A.

3.1. Front View

Fig. 02

01) Residual-Current Device
02) Output 1 Main Circuit Breaker (MCB)
03) Output 2 Main Circuit Breaker (MCB)
04) Output 3 Main Circuit Breaker (MCB)
05) Output 4 Main Circuit Breaker (MCB)
06) L1 voltage & amperage LED display
07) L2 voltage & amperage LED display
08) L3 voltage & amperage LED display

3.2. Back View

Fig. 03

09) 5-pin CEE OUT 1

10) 5-pin CEE OUT 2

11) 5-pin CEE OUT 3

12) 5-pin CEE OUT 4

13) 5-pin CEE power IN

3.3. Product Specifications

Model:

PSA-125A4C

Electrical:
Rated current:	125 A
MCB rated current:	63 A
MCB class:	Class C
MCB poles:	3
Conductors:	5

Inputs/Outputs:
Power connector IN:	1 x CEE male 125 A 3P+N+PE, 400 V AC, 50/60Hz
Power connector OUT:	4 x CEE female 63 A 3P+N+PE, 230 V AC, 50/60 Hz

Physical:
Dimensions:	482 x 400 x 267 mm (LxWxH)19" x 6 U (LxH)
Weight:	17 kg

Operation and control:
Control panel:	7-segment LED display

Construction:
Housing:	Metal
Color:	Gray
IP rating:	IP20

Thermal:
Ambient temperature ta :	From -5 °C to 35 °C

3.4. Dimensions

Fig. 04

4. Installation

4.1. Safety Instructions for Installation

WARNING

Incorrect installation can cause serious injuries and damage of property.

Installation must be carried out only by instructed or skilled persons.

Follow all applicable European, national and local safety regulations concerning electrical installations.

Attention

Make sure there is enough space for ventilation around the device.

4.2. Installation Site Requirements

• The device must be installed only indoors.
• The device can be placed on a flat surface or mounted in a standard 19-inch rack.
• The maximum ambient temperature t_α = 35°C must never be exceeded.
• The relative humidity must not exceed 50 % with an ambient temperature of 35 °C.

4.3. Rack Mounting

The device can be mounted in a standard 19-inch rack. The device requires 6 rack units (RU) of space. 1 rack unit is 44,45 mm high.

Make sure that the rack is sufficiently secured to prevent it from becoming unstable or falling over.

To mount the device in a two-post rack, follow the steps below:

01) Insert 4 cage nuts in the openings on the rack posts where you want to mount the device.
02) Position the device in front of the rack posts so that the 4 mounting openings on the flanges face the openings on the rack posts with cage nuts.
03) Using a screwdriver, mount the device to the rack posts with 4 screws.

4.4. Connecting to Power Supply

DANGER

Electric shock caused by short-circuit

The device accepts AC mains power at 400 V and 50/60 Hz. Do not supply power at any other voltage or frequency to the device.

This device falls under IEC protection class I. Make sure that the device is always electrically connected to the ground (earth).

Before connecting the device to the socket-outlet:

• Make sure that the power supply matches the input voltage specified on the information label on the device.
• Make sure that the socket-outlet has ground (earth) connection.

Connect the device to the socket-outlet with the power plug or a 3 x 125 A CEE H07RN-F cable.

4.4.1. Schematic Overview

Fig. 05

5. Setup and Operation

5.1. Warnings and Precautions

Attention

Connect all cables before supplying power.

Disconnect power supply before connecting or disconnecting cables.

5.2. Safety Instructions for Operation

Attention

This device must be used only for the purposes it is designed for.

This device is intended for professional use as a 3-phase power distribution unit in theaters, entertainment facilities, public venues, and similar. It is suitable only for indoor use. This device is not suitable for households and residential buildings.

This device is designed for use in environment B.

Any other use, not mentioned under intended use, is regarded as non-intended and incorrect use.

Attention

Power supply

Before connecting the device to the power supply, make sure that the current, voltage and frequency match the input voltage, current and frequency specified on the information label on the device.

Do not use the residual-current device or the circuit breakers as an on/off switch, to switch on the devices connected to the outputs. Switch these devices on only after you have set the residual-current device and all the circuit breakers to ON position.

5.3. Start-up

01) Connect the device to the power supply using the 5-pin CEE connector IN (13).
02) Move the residual-current device (01) to ON position.
03) Move the main circuit breakers (02/03/04/05) to ON position.
04) Connect external devices to the 5-pin CEE connectors OUT (09/10/11/12).
05) Switch on the external devices.

6. Troubleshooting

This troubleshooting guide contains solutions to problems which can be carried out by an ordinary person. The device does not contain user-serviceable parts.

Unauthorized modifications to the device will render the warranty void. Such modifications may result in injuries and material damage.

Refer servicing to instructed or skilled persons. Contact your Highlite International dealer in case the solution is not described in the table.

Problem	Probable cause(s)	Solution
The device does not function at all	No power to the device	Check if power is switched on and cables are plugged in
	The residual-current device or the main circuit breakers are in OFF position	Check the total current load of the connected devices.Check if the external devices connected to the outputs are not damagedMove the residual-current device and the main circuit breakers to ON position.

7. Maintenance

7.1. Safety Instructions for Maintenance

DANGER Electric shock caused by dangerous voltage inside

Disconnect power supply before servicing or cleaning.

7.2. Preventive Maintenance

Attention Before use, examine the device visually for any defects.

Make sure that:

• All screws used for installing the device or parts of the device are tightly fastened and are not corroded.
  • There are no deformations on housings, fixations and installation points.
• The power cables are not damaged and do not show any material fatigue.

7.2.1. Basic Cleaning Instructions

To clean the device, follow the steps below:

01) Disconnect the device from the electrical power supply.
02) Allow the device to cool down for 5 minutes.
03) Clean the device with a soft, lint-free cloth.

Attention

• Do not immerse the device in liquid.
• Do not use alcohol or solvents.

7.3. Corrective Maintenance

The device does not contain user-serviceable parts. Do not open the device and do not modify the device.

Refer repairs and servicing to instructed or skilled persons. Contact your Highlite International dealer for more information.

8. Deinstallation, Transportation and Storage

• Disconnect power supply before deinstallation.
• Use the original packaging to transport the device, if possible.
• Clean the device before storing. Follow the cleaning instructions in chapter 7.2.1. Basic Cleaning Instructions on page 14.
• Store the device in the original packaging, if possible.

9. Disposal

Correct disposal of this product

Waste Electrical and Electronic Equipment

This symbol on the product, its packaging or documents indicates that the product shall not be treated as household waste. Dispose of this product by handing it to the respective collection point for recycling of electrical and electronic equipment. This is to avoid environmental damage or personal injury due to uncontrolled waste disposal. For more detailed information about recycling of this product contact the local authorities or the authorized dealer.

10. Approval

Check the respective product page on the website of Highlite International (www.highlite.com) for an available declaration of conformity.

SHOW

GEAR