Crown G160MA - User Manual

To Next Page

he Crown

135MA and 160MA are high-

value mixer-ampliﬁ ers for commercial audio.

They provide 8-ohm and constant-voltage

outputs (70V and 100V). Typical uses are paging,

background music, and music-on-hold.

The 135MA provides 3 inputs (each with a volume

control) and a 35W ampliﬁ er output. The 160MA

provides 4 inputs (each with a volume control)

and a 60W ampliﬁ er output.

Other features include priority muting, voice-

activated muting, phantom power, and Bass and

Treble controls.

Speciﬁ cations

Performance

Frequency Response (at 1 watt from line out):

50 Hz to 20 kHz ± 1 dB.

19 Hz to 34 kHz +0, –3 dB.

Signal to Noise Ratio (ref. to rated power,

master volume at minimum):

Mic: > 58 dB.

Line: > 60 dB.

Telephone: > 60 dB.

Inputs 2 or 3 (and 4 in 160MA): > 78 dB.

THD + N: < 0.5% at rated power at 1 kHz.

< 0.1% at 5W at 1 kHz.

Input Sensitivity (for full output at maximum

gain):

Input 1: Mic 3mV, Line 800mV.

Input 2: 400mV.

Input 3: 400mV.

Input 4 (160MA only): 400mV.

Input Impedance (nominal):

Mic: 2.2 kilohms.

Line: 10 kilohms.

RCA: 10 kilohms.

Crosstalk: –82 dB at 1kHz (Ch. 1 line input 0.8V,

Ch. 1 volume at minimum, other channel volumes

at maximum).

Line Output Level (nominal): 1V into 10 kilohms.

Phantom Power: 15 VDC.

AC Line Voltages Available:

Universal Power Supply. Line voltage tolerance

+15%, –20%.

Operating Temperature/Humidity: 0° C to 40° C

at 95% relative humidity (non-condensing).

Storage Temperature: –20° C to 85° C.

Front Panel Controls and Indicators

Power Switch: Pushbutton on-off switch.

Input Volume Controls: Four controls, one per

input. Detented potentiometers with knobs.

Tone Controls: Bass and Treble non-detented

recessed potentiometers under master output

volume control. Bass ±10 dB at 100 Hz, Treble

±10 dB at 10 kHz.

Power Indicator: Blue LED indicates power on.

Input Signal Presence Indicators: Green LED,

one above each channel's input attenuator, illumi-

nates when input signal exceeds –40 dBu.

Input Signal Clip Indicators: Green LED, one

above each channel's input attenuator, ﬂ ashes

brightly at threshold of audible distortion.

Output Signal Presence Indicator: Green LED

above master output volume control illuminates

when any input signal exceeds –40 dBu.

Output Signal Clip Indicators: Red LED above

master output volume control ﬂ ashes brightly at

threshold of audible distortion.

Master Output Volume Control: Detented potenti-

ometer with knob.

Back Panel Controls, Connectors and

Indicators

AC Power Inlet: Detachable IEC accepts US or

Euro style power cords.

Ampliﬁ er Output Connector: 4-position terminal

barrier block with COM (Common), 8 ohms, 70V

and 100V terminals. Accepts up to 10 AWG termi-

nal forks. Non-touch cover included.

Preamp Line Out Connector: 3-pin balanced

Phoenix-type for connection to external ampliﬁ -

ers. Level independent of master volume control.

Input Connector 1: 5-terminal Phoenix connector.

3 terminals for balanced signal, 2 terminals for

priority contact closure, which mutes other chan-

nels when DIP switch 3 is on.

Input Connector 2: Unbalanced line-level RCA-

type connectors.

Input Connector 3: Unbalanced line-level RCA-

type connectors.

Input Connector 4 (160MA only): Unbalanced

line-level RCA-type connectors.

Telephone (MOH) Output Connector: 4-terminal

Phoenix connector (2 terminals for 1W output to

8-ohm speaker, 2 terminals for 600-ohm output to

PBX music-on-hold port).

MOH Level Control: Trim pot adjusts level for

Music-On-Hold output from Telephone (MOH)

Output Connector.

Amp Conﬁ guration DIP Switch: DIP switch selec-

tion for multiple functions.

1. On: Sets CH1 to Mic Input. Off: Sets CH1 to

Line Input.

2. On: Sets CH1 to Normal mode (no priority).

3. On: CH1 priority contact closure mutes other

channels.

4. On: CH1 VOX mutes other channels by sensing

signal through Input 1.

5. On: Routes CH1 to MOH output.

6. On: Routes CH2 to MOH output.

7. On: Routes CH3 to MOH output.

8. On: 15V phantom power.

COMMERCIAL AUDIO SERIES

• 3 inputs (each with a volume control), and one

35W ampliﬁ er output channel in 135MA

• 4 inputs (each with a volume control), and one

60W ampliﬁ er output channel in 160MA

• Ideal for paging, background music, and

music-on-hold

• Balanced Phoenix-type mic/line input,

telephone output, dual RCA stereo music

inputs, screw-terminal speaker outputs

• Priority muting by VOX or external switch

• Bass and Treble controls on master output

• Three-Year, No-Fault, Fully Transferable

Warranty completely protects your invest-

ment and guarantees its speciﬁ cations

Features

135MA

160MA

1 kHz

Power

35W

Minimum guaranteed power

into 8 ohms or 70V/100V output

135MA

*1 kHz Power: refers to maximum power in watts at

1 kHz with 0.5% THD.

1 kHz

Power

60W

Minimum guaranteed power

into 8 ohms or 70V/100V output

160MA

*1 kHz Power: refers to maximum power in watts at

1 kHz with 0.5% THD.

Need help?

Do you have a question about the Crown G160MA and is the answer not in the manual?

Overview

Performance Specifications
Environmental Specifications
Front Panel Controls and Indicators
Back Panel Controls, Connectors and Indicators
Cooling
Protection
Included Accessories
Optional Accessories
Dimensions
Weight
Maintenance and Warranty

The Crown 135MA and 160MA are high-value mixer-amplifiers designed for commercial audio applications, offering both 8-ohm and constant-voltage outputs (70V and 100V). These units are ideal for paging, background music, and music-on-hold systems.

The 135MA model features three inputs, each with its own volume control, and a 35W amplifier output. The 160MA model expands on this with four inputs, each with a volume control, and a more powerful 60W amplifier output. Both models include essential features such as priority muting, voice-activated muting (VOX), phantom power, and Bass and Treble controls for master output.

Performance Specifications:

Frequency Response (at 1 watt from line out): 50 Hz to 20 kHz ± 1 dB; 19 Hz to 34 kHz +0, -3 dB.
Signal to Noise Ratio (ref. to rated power, master volume at minimum):
- Mic: > 58 dB
- Line: > 60 dB
- Telephone: > 60 dB
- Inputs 2 or 3 (and 4 in 160MA): > 78 dB
THD + N: < 0.5% at rated power at 1 kHz; < 0.1% at 5W at 1 kHz.
Input Sensitivity (for full output at maximum gain):
- Input 1: Mic 3mV, Line 800mV
- Input 2: 400mV
- Input 3: 400mV
- Input 4 (160MA only): 400mV
Input Impedance (nominal):
- Mic: 2.2 kilohms
- Line: 10 kilohms
- RCA: 10 kilohms
Crosstalk: -82 dB at 1kHz (Ch. 1 line input 0.8V, Ch. 1 volume at minimum, other channel volumes at maximum).
Line Output Level (nominal): 1V into 10 kilohms.
Phantom Power: 15 VDC.
135MA Minimum guaranteed power: 35W into 8 ohms or 70V/100V output (at 1 kHz with 0.5% THD).
160MA Minimum guaranteed power: 60W into 8 ohms or 70V/100V output (at 1 kHz with 0.5% THD).

Environmental Specifications:

AC Line Voltages Available: Universal Power Supply with a line voltage tolerance of +15%, -20%.
Operating Temperature/Humidity: 0° C to 40° C at 95% relative humidity (non-condensing).
Storage Temperature: -20° C to 85° C.

Front Panel Controls and Indicators:

Power Switch: Pushbutton on-off switch.
Input Volume Controls: Four detented potentiometers with knobs, one for each input.
Tone Controls: Non-detented recessed potentiometers for Bass (±10 dB at 100 Hz) and Treble (±10 dB at 10 kHz) adjustments, located under the master output volume control.
Power Indicator: Blue LED indicating power on.
Input Signal Presence Indicators: Green LED, one above each channel's input attenuator, illuminates when input signal exceeds -40 dBu.
Input Signal Clip Indicators: Green LED, one above each channel's input attenuator, flashes brightly at the threshold of audible distortion.
Output Signal Presence Indicator: Green LED above master output volume control illuminates when any input signal exceeds -40 dBu.
Output Signal Clip Indicators: Red LED above master output volume control flashes brightly at the threshold of audible distortion.
Master Output Volume Control: Detented potentiometer with knob.

Back Panel Controls, Connectors and Indicators:

AC Power Inlet: Detachable IEC connector for US or Euro style power cords.
Amplifier Output Connector: 4-position terminal barrier block with COM (Common), 8 ohms, 70V, and 100V terminals. Accepts up to 10 AWG terminal forks. Includes a non-touch cover.
Preamp Line Out Connector: 3-pin balanced Phoenix-type connector for external amplifiers. Level is independent of master volume control.
Input Connector 1: 5-terminal Phoenix connector for balanced signal and priority contact closure (mutes other channels when DIP switch 3 is on).
Input Connector 2, 3, and 4 (160MA only): Unbalanced line-level RCA-type connectors.
Telephone (MOH) Output Connector: 4-terminal Phoenix connector (2 terminals for 1W output to 8-ohm speaker, 2 terminals for 600-ohm output to PBX music-on-hold port).
MOH Level Control: Trim pot to adjust level for Music-On-Hold output from Telephone (MOH) Output Connector.
Amp Configuration DIP Switch: DIP switch selection for multiple functions:
1. On: Sets CH1 to Mic Input. Off: Sets CH1 to Line Input.
2. On: Sets CH1 to Normal mode (no priority).
3. On: CH1 priority contact closure mutes other channels.
4. On: CH1 VOX mutes other channels by sensing signal through Input 1.
5. On: Routes CH1 to MOH output.
6. On: Routes CH2 to MOH output.
7. On: Routes CH3 to MOH output.
8. On: 15V phantom power.
VOX Threshold: Trim pot to control the voice level on CH1 required to mute other channels. Can be set for no muting.

Cooling:

Convection cooled.

Protection:

The units include current limiting, over-temperature thermal cutout, and DC-fault load protection. They are also protected against turn-on/turn-off thumps.

Included Accessories:

Power cord
Non-touch cover for output connectors
Phoenix-type connectors

Optional Accessories:

Part no. IST 600-ohm Isolation Transformer for Telephone Output or Input 1.
Part no. RM1 single rack mount kit for mounting a single MA unit in a rack.
Part no. RM2 double rack mount kit for mounting two MA units side-by-side in a rack.
Part no. S-Cover 10-pack of security knobs.

Dimensions:

Width: Half rack width (9.5 in. or 24.1 cm).
Height (front panel): 3.5 in. (8.9 cm).
Height (including feet): 4.1 in. (10.5 cm).
Depth (front panel to back panel): 12.2 in. (31.0 cm).
Depth (front of knobs to back panel): 13.9 in. (35.2 cm).

Weight:

Net Weight:
- 135MA: 8 lb 2 oz (3.7 kg).
- 160MA: 9 lb 7 oz (4.3 kg).
Shipping Weight:
- 135MA: 10 lb 16 oz (4.9 kg).
- 160MA: 12 lb 4 oz (5.6 kg).

Maintenance and Warranty:

Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown mixer-amplifier. This warranty ensures that the mixer-amplifier will meet or exceed original specifications for three years of ownership. If the unit fails or does not perform to specifications during this period, it will be repaired or replaced at Crown's expense. The warranty covers manufacturing defects and performance issues, excluding losses covered by insurance or those caused by intentional abuse. The coverage is transferable if the mixer-amplifier is sold. For full warranty disclosure and details, customers should consult their authorized Crown dealer. For customers outside the USA, contact an authorized Crown distributor or call 574-294-8200.