ZETTA 4100 - Receiver Ram Audio - Free user manual and instructions

Product type	Power amplifier (receiver)
Brand	Ram Audio
Model	ZETTA 4100
Channels	4 channels
Operating modes	Stereo (DUAL) or bridged (BRIDGE)
Power supply	170-265 V AC, 50/60 Hz
Input connectors	Female XLR (balanced or unbalanced)
Output connectors	Speakon
Input attenuators	Independent per channel, detented
LED indicators	Signal (green), Clip (ICL), PMS (orange), Power (blue)
Protection systems	PMS (Power Management System), ICL2 (Intelligent Clipping Limiter), SOA (transistor protection)
Thermal protection	Automatic shutdown in case of overheating
Protection class	Class I (grounded)
Cooling	Forced ventilation
Daisy-chain	Possible via male XLR for linking amplifiers
Maintenance and cleaning	Disconnect before cleaning, use a dry cloth
Safety	Do not expose to water or moisture, do not open
Repairability	Only entrust to a qualified approved technician
Spare parts	Contact Ram Audio after-sales service
General information	User manual available for PDF download

Frequently Asked Questions - ZETTA 4100 Ram Audio

How to connect speakers in stereo mode?

In stereo mode (DUAL), select DUAL mode on the rear switch. Connect input signals to the female XLR connectors of each channel. Connect speakers to Speakon outputs respecting polarities (+1 and -1). Use the front attenuators to adjust the level of each channel.

How to configure the amplifier in bridged mode (Bridge)?

For bridged mode, set the switch to BRIDGE. Connect the input signal to the XLR connector of channel A (or C for 4-channel models). Speakers connect to +1 and -2 terminals of the output Speakon of channel A (or C). Use the attenuator of channel A (or C) to control the level. Note: the negative terminal is not ground.

What does the orange PMS indicator mean?

The orange PMS (Power Management System) indicator indicates that the amplifier is in protection or limiting phase. This can occur during power-up (output muted until circuits are ready), in case of high internal temperature or excessive current consumption. The amplifier continues to operate with reduced power to avoid damage.

Why does the Clip indicator light up?

The Clip indicator indicates that the input signal is too high and clipping (distortion) is occurring. The ICL2 (Intelligent Clipping Limiter) system then acts to reduce gain and protect speakers while maintaining musical punch.

What to do if no sound comes out of the amplifier?

First check that the unit is on (blue LED). Ensure the input attenuators are not at minimum. Check input and output cable connections. If the PMS indicator is lit, wait for the power-up delay to end. Also check that the speakers are not short-circuited or that the impedance is correct.

What type of cable to use for unbalanced inputs?

For an unbalanced input, solder pins 1 and 3 of the XLR connector to ground, and pin 2 to signal. If pin 3 is not connected to ground, you will suffer a 6 dB loss (75% less power).

How to clean the amplifier?

Always disconnect the unit before cleaning. Use a soft dry cloth to wipe the surface. Never use liquid or abrasive products. Ensure the ventilation grilles are not obstructed.

Can I use the amplifier with a different mains voltage?

The amplifier is designed to operate on a voltage range of 170 to 265 V AC. It is compatible with 220-240 V networks. For other voltages, consult a qualified technician.

How to daisy-chain multiple amplifiers?

The male XLR connectors on the rear panel allow linking the inputs of multiple amplifiers. Simply connect the output of one amp to the input of another via an XLR cable to distribute the same signal.

What to do in case of overheating?

If the amplifier stops due to overheating (thermal shutdown), let it cool down. Check that the fans are not blocked and that the ventilation grilles are clear. Reduce the output level or improve ventilation. The PMS system automatically reduces power if the temperature approaches the limit.

USER MANUAL ZETTA 4100 Ram Audio

Professional Power Amplifiers

ZETTASeries

210-215-220-236

420-430-440

OPERATION MANUAL

NOTICE D'EMPLOI

BEDIENUNGSANLEITUNG

SAFETY PRECAUTIONS

SICHERHEITSHINWEISE

AVERTISSEMENTS

WARNING:

ACHTUNG!:

RÈGLES DE SÉCURITÉ:

The exclamation point inside an equilateral triangle indicates the existence of internal components whose substitution may affect safety.

The lightning and arrowhead symbol warns about the presence of uninsulated dangerous voltage.

To avoid fire or electrocution risk do not expose the unit to rain or moisture.

To avoid electric shock, do not open the unit. No user serviciable parts inside. In the case of disfunction, have the unit checked by qualified agents.

Class I device.

VORSICHT

0 Safety Precautions

1 General Information

1.1 Introduction

1.2 Main Characteristics

2 Controls: Where and What?

2.1 Front Panel

2.2 Rear Panel

3 Installation and Operation

3.1 Connections

3.1.1 Dual Channel Mode

3.1.2 Bridge Channel Mode

3.2 Troubleshooting

4 Technical Specifications

4.1 Protection Systems

4.2 Data

©2014 by C.E. Studio-2 s.l.

Pol.Ind. La Figuera

C/Rosa de Luxemburgo n°34

46970 Alaquas - Valencia - SPAIN

Phone: [phone]

Fax: [phone]

http://www.ramaudio.com

e-mail: [e-mail]

P-5435-634 QXPDQXDoc 7/14

RAM Audio ^® , PMS ^™ , SSP ^™ , ICL ^™ and QuantaPulse ^™ are registered trademarks of C.E. Studio-2 s.l.. All other names are trademarks of their respective companies.

1.1 Introduction

The ZETTA Series, is the result of an in-depth study, in order to reach the best compromise between economy and performances, taking advantage of latest improvements in automated mixed surface mount and through hole electronic assembly.

ZETTA Series are a project based on an up-side-down mono-block approach offering an all-in-one power module that contains the entire amplifier assembly. Simplicity and effectiveness run hand by hand through the entire design to obtain an effectively skilled and workable product.

The last generation QuantaPulse ^™ switching power supply allows to reach a new level of refined sensing and control of the power flow.

1.2 Main Characteristics

• Unmatched audio quality hi efficiency Class H design
• 2/4 Channels models from 1000W up to 4000W
• Ultra light weight 6kg, compact package 25cm deep
• Last generation QuantaPulse™ switch mode power supply
• Power Management System (PMS™) and Clip Limiter (ICL™)
• Up-side-down design to avoid fan dust accumulation
• Industry standard Neutrik® XLR and Speakon® connectors
• Comprehensive protection set (ICL, PMS, SSP, turn-on, Temp, DC....)
  • Detented sealed potentiometers
• Dual or bridge mode operation
• Temperature controlled, back to front cooling fan

Controls: Where and What?

1 Signal attenuation level control knobs: Permit independent control of each channel's attenuation (21 steps).
2 SIGNAL: This LED indicates presence of signal at the inputs. PMS : LED indicating PMS in operation (see page 11). CLIP: LED indicating Intelligent Clip Limiter in operation.
3 Main Power Switch: Position I: Connects the amplifier's current feed. (Blue LED on). Position O disconnects the Power.

2.1 Frontplatte

Siehe Fig. 1

Controls: Where and What?

1 Signal Input: Female Neutrik® XLR Connectors for the amplifier's signal input.
2 Speaker connectors: Neutrik® Speakon to connect the speakers.
3 Dual / Bridge Operation Selection Switch. To control the level in Bridge mode use the CH-A level knob.
□ Mains Power Cord: to connect the amplifier to the mains network. The colour code is: Blue: Neutral Brown: Live, single phase Yellow-green: Protective Earth

2.2 Rückplatte

Siehe Fig. 2

Installation and Operation

The Power switch must always be on the "Off" position before plugging the amp to a properly earthed mains socket (170-265V AC). The colour code is:

Blue: Neutral

Brown: Live, single phase

Yellow-green: Protective Earth

The input signal fed to the amplifier can be either balanced or un-balanced. The drawing below describes both ways to wire an XLR connector for the purpose.

Balanced Signal: Connect pin 1 to Ground, pin 2 to Signal + (hot) and pin 3 to Signal - (cold).

Unbalanced Signal: Connect Pin 1 to Ground, pin 2 to Signal and pin 3 to Ground.

3.1 Anschlüsse

Brown: Live, single phase

Yellow-green: Protective Earth

Brown: Live, single phase

Yellow-green: Protective Earth

Important!: If a connection is done with a un-balanced line and pin 3 on the XLR is not connected to ground, a 6 dB loss occurs in the line and only a quarter of the amplifier power is produced.

The amplifiers provides, for each channel, a female XLR Connector (Signal Input) paralleled to a male XLR to daisy chain several amplifiers with the same signal line (LINK).

Installation and Operation

The amplifier can operate on two different configurations: DUAL, or BRIDGE. The connections for the two modes are different.

3.1.1 DUAL Channel Mode

See Figure 3

• Set the Amplifier Mode to "DUAL".
• Connect the signal lines to the female XLR connectors on all channels.
• Connect the speakers' lines to the corresponding Speakon on the amp respecting the polarity.
• Use the level control knob on the front panel to adjust each channel independently.
• Each signalling LED group will show its corresponding channel status.

3.1.2 BRIDGE Channel Mode

See Figure 4

• Set the configuration mode to "BRIDGE"
• Connect a signal line to input female XLR Channel "A" (or Ch-C in 4 channel models).
• Connect the speaker line to the Channel A Speakon (or Ch-C in 4 channel models) wired to +1 and -2. In this way pin +1 is positive.
• Use Channel-A (or Ch-C in 4 channel modes) control knob to adjust the amp's output.
• The signalling LED groups will show the single channel status.

WARNING! The “-” pins, do not have to be Ground!

ACHTUNG! The “-” pins, do not have to be Ground!

4

Bridge Mode

2 Ch models

3
Dual Channel 4 Channel models

4
Bridge Mode 4 Channel models

Bridge + Dual Mode 3 Channels Mode

Installation and Operation

In the event of incorrect connection or misfunctioning, the amp will activate one or more of its LED to warn about the problem.

3.2 Problemlösung

Correct function: SGNL lights to indicate signal presence.

ICL: The Intelligent Clip Limiter is operating (see page 10).

No Signal: No Input Signal is reaching the amp.

Overheating: The amplifier has reached the maximum operational temperature. Most common cause is: the normal air flow is blocked, accumulated dirt, dust or object leaning against the grill. Check and clean periodically.

PMS: Several causes can trigger this LED, most common are:

This is a complete set of protections that monitors the main amp parameters (load status, signal input, temperature, current, etc.) in order to draw from the power supply only the precise amount of current required to maintain safe operation during hazardous or extreme working conditions.

This system controls the amount of power that the amp delivers under three basic circumstances:

1.- The power-on sequence, where output is inhibited until the amp circuits are ready to operate. This routine is repeated at every restart, not just when the power switch is activated.
2.- When internal temperatures rise to near thermal shutdown point due to unfavourable operating conditions. Here the system takes control, restricting current so as to maintain operational continuity at the precise power level which the amp is capable of withstanding at that particular moment.
3.- Excessive current consumption. This event only occurs either under laboratory conditions (long term sinusoidal signal testing with dummy loads) or, for example, in field applications in conditions of prolonged acoustic howl-round. Here PMS takes control to avoid any damage to the speakers and to prevent the mains breaker from tripping or the fuses blowing.

ICL2 ^™ - Intelligent Clip Limiter

The RAM Audio ICL2 is an anticlip system to avoid speaker failure and provide more acceptable sound quality even when clipping occurs. With the ICL2 system you don't lose the music "punch" but the speakers are kept under control.

SSP™ - SOA Sentry Protection

SOA Sentry protection effectively limiting the power that the amp could deliver into an incorrect load or to a direct short-circuit. This avoids power transistor failure.

PMS™ - Power Management System

SSP™ - SOA Sentry Protection

SSP™ - SOA Sentry Protection

Technical Specifications

Technical Specifications

	Z-210 Z-215 Z-220 Z-236 Z-420 Z-430 Z-440
Max. Output Power
@ 2Ω	2x 500 W	2x 750 W	2x 1000 W	2x 1800 W	4x 500 W	4x 750 W	4x 1000 W
@ 4Ω	2x 400 W	2x 700 W	2x 1000 W	2x 1750 W	4x 400 W	4x 700 W	4x 1000 W
@ 8Ω	2x 240 W	2x 450 W	2x 650 W	2x 950 W	4x 220 W	4x 450 W	4x 630 W
Bridge @ 4Ω	1000 W	1500 W	2000 W	3600 W	2x 1000 W-	2x 1500 W	2x 2000 W
Bridge @ 8Ω	800 W	1400 W	2000 W	3500 W	2x 800 W	2x 1400 W	2x 2000 W
Frequency Response
Power Bandwidth ±0.25dB			20Hz-20kHz
Phase Response
@ 1 watt 20Hz-20kHz			±15 deg
Total Harmonic Distortion
20Hz-20kHz			<0.05%
Intermodulation Distortion
SMPTE			<0.05%
Damping Factor
20-500Hz @8Ω			>500
Crosstalk
20Hz-20kHz			>75dB
Voltage Gain			32dB
Sensitivity
Rated Power (26/32/38dB Gain)	1.1 V	1.5 V	1.8 V	2.2 V	1.1 V	1.5 V	1.8 V
Signal-to-Noise Ratio
20Hz-20kHz	101dBA	103dBA	104dBA	105dBA	101dBA	103dBA	104dBA
Required AC Mains
Operating Voltage (50Hz-60Hz)			170V-265V AC
Power On Idling (@230V)	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A
1/8 Rated Power (@4 ohm)	3.5 A	4 A	5 A	10 A	7 A	8 A	10 A
Dimensions
W x H x D (mm)			483x88.9x254
W x H x D (inches)			19x3.5x10
Weight
Net (Kg-Lbs)	5-11	5-11	6-26.5	12-26.5	12-26.5	12-26.5	12-26.5
Protections
Soft-start, Turn-on Turn-off transients, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, ICLTM, PMSTM and SSPTM