135MA
160MA
C O M M E R C I A L A U D I O S E R I E S
The Crown® 135MA and 160MA are highvalue mixer-amplifiers 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 amplifier output. The 160MA provides 4 inputs (each with a volume control) and a 60W amplifier output.
Other features include priority muting, voiceactivated muting, phantom power, and Bass and Treble controls.
Specifications
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.
135MA |
*1 kHz |
Power |
|
Minimum guaranteed power |
35W |
into 8 ohms or 70V/100V output |
*1 kHz Power: refers to maximum power in watts at 1 kHz with 0.5% THD.
Features
• 3 inputs (each with a volume control), and one |
• Balanced Phoenix-type mic/line input, |
35W amplifier output channel in 135MA |
telephone output, dual RCA stereo music |
• 4 inputs (each with a volume control), and one |
inputs, screw-terminal speaker outputs |
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|
60W amplifier output channel in 160MA |
• Priority muting by VOX or external switch |
• Ideal for paging, background music, and |
• Bass and Treble controls on master output |
music-on-hold |
• Three-Year, No-Fault, Fully Transferable |
|
|
|
Warranty completely protects your invest- |
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ment and guarantees its specifications |
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, illuminates when input signal exceeds –40 dBu.
Input Signal Clip Indicators: Green LED, one above each channel's input attenuator, flashes 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 flashes brightly at threshold of audible distortion.
Master Output Volume Control: Detented potentiometer with knob.
160MA |
*1 kHz |
Power |
|
Minimum guaranteed power |
60W |
into 8 ohms or 70V/100V output |
*1 kHz Power: refers to maximum power in watts at 1 kHz with 0.5% THD.
Back Panel Controls, Connectors and
Indicators
AC Power Inlet: Detachable IEC accepts 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. Non-touch cover included.
Preamp Line Out Connector: 3-pin balanced Phoenix-type for connection to external amplifiers. 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 channels when DIP switch 3 is on.
Input Connector 2: Unbalanced line-level RCAtype connectors.
Input Connector 3: Unbalanced line-level RCAtype 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 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.
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