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 high- value 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, voice- activated muting, phantom power, and Bass and Treble controls.

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

 

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-

 

ment and guarantees its specifications

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.

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, 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 potenti- ometer 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 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-levelRCA-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 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.

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Crown Audio 135MA, 160MA specifications Performance, Front Panel Controls and Indicators

135MA, 160MA specifications

Crown Audio, a leading manufacturer of professional audio equipment, has made a name for itself with its innovative amplifier designs. Among their extensive lineup, the Crown 160MA and 135MA models stand out as highly regarded solutions for various applications, particularly in commercial audio systems, installations, and even mobile setups.

The Crown 160MA is a 160-watt, 2-channel amplifier that delivers robust performance while ensuring outstanding sound quality. Designed with versatility in mind, it is well-suited for powering speakers in both small venues and larger installations where high-quality audio is required. The amplifier features a built-in mixer with three inputs, allowing users to easily connect multiple audio sources. This feature is particularly beneficial in settings such as community centers, conference rooms, and educational institutions.

On the other hand, the Crown 135MA is a slightly smaller yet equally capable 135-watt, 2-channel amplifier, designed for applications where space may be limited. It retains many of the key features found in the 160MA, offering reliable performance while providing the necessary power for smaller speaker systems. The integrated mixer also accommodates various audio inputs, simplifying connections in various environments.

Both models incorporate advanced technologies that enhance performance and reliability. They utilize Class D amplification, which not only reduces energy consumption but also minimizes heat generation, allowing for a more compact design without sacrificing output power. This makes them ideal for permanent installations where space is a constraint. Additionally, the amplifiers come equipped with comprehensive protection circuitry, safeguarding against potential overloads and thermal issues.

The Crown 160MA and 135MA are also designed with user-friendly controls and indicators, making them accessible for both seasoned audio professionals and newcomers. Their rugged built quality ensures durability in diverse environments, whether being used in commercial spaces, houses of worship, or temporary events.

In summary, the Crown Audio 160MA and 135MA offer a compelling combination of power, sound quality, and versatility. Their innovative features, such as built-in mixing capabilities, efficient Class D technology, and robust protective measures, make them excellent choices for anyone seeking reliable amplification solutions. Whether for small to medium-sized installations or mobile setups, these amplifiers are engineered to deliver exceptional audio performance for any application.