CROWN 135MA - Three-input mixer-amplifier, 35W

CROWN 135MA – Three-input mixer-amplifier, 35 W

The CROWN 135MA is a high-value commercial audio mixer-amplifier designed for paging , background music , and music on hold applications. Featuring three independent inputs, each with volume control, and a built-in 35W amplifier in low impedance (8 Ω) or constant voltage (70 V/100 V), it offers a compact and reliable solution. It features a balanced Phoenix-type microphone or line input, stereo RCA music inputs, a phone output for music on hold, and speaker outputs via screw terminals. Priority mute (VOX or external switch), phantom power, and bass and treble controls on the master output ensure adaptability to any commercial environment.

Main features

• Three inputs with independent volume control and a 35 W output channel into 8 Ω or 70 V/100 V
• Balanced Phoenix-type mic/line input; dual RCA music inputs; phone output; screw-terminal speaker outputs
• Priority muting by VOX or external switch
• +15 V phantom power for condenser microphones
• Bass and treble controls on the master output
• Universal switching power supply (100–240 VAC, tolerance +15%/–20%)
• Passive convection cooling, silent operation

Product benefits

• Quick installation: all in a 1U chassis with professional Phoenix and RCA type connections.
• Flexible use: suitable for paging, background music and phone retention.
• Sound quality: Flat response 50 Hz–20 kHz ± 1 dB and superior S/N for each input
• Signal continuity: automatic priority over voice signal or external switching.
• Commercial reliability: rugged construction, three-year no-fault warranty, and long-life components.

Use cases

• Public address and announcement systems in stores, restaurants, and airports.
• Background music in hotels, shopping centers and offices.
• Music on hold and hold in corporate telephone exchanges.

Frequently Asked Questions

• How do you select 70V or 100V? Using XFMR-4 or XFMR-8 transformers at the output.
• Does it have phantom power? Yes; +15 V DC for condenser microphones on the Phoenix input.
• What is the frequency response? 50 Hz to 20 kHz ± 1 dB; extends to 34 kHz by 3 dB.

Description for projects

1U rack-mount mixer-amplifier with 3 controllable inputs, 35W @ 8Ω (70V/100V), Phoenix mic/line, stereo RCA, VOX/external mute, +15V phantom power, bass/treble controls, universal power supply, passive cooling; dimensions 104 × 241 × 353 mm; weight 3.7 kg.