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Biema A 4155 Operating Instructions

Pa amplifier stereo 2x150w

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A 4155
PA Amplifier Stereo 2x150W

Operating Instructions

This PA Amplifier is an effective solution for demanding commercial audio
applications. This new series dubbed the "Apple" range have been
completely redesigned by Biema to offer vastly improved cooling, efficiency
and circuit protection. This range is designed to function as a stereo or high
power single channel amplifier for use in foreground sound reinforcement
ie: pubs, clubs, cinemas and multi-function venues. The variable speed
cooling fan and 'T' shaped heatsink tunnel ensure the amplifier
performs well even in demanding conditions.

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Summary of Contents for Biema A 4155

  • Page 1: Operating Instructions

    This PA Amplifier is an effective solution for demanding commercial audio applications. This new series dubbed the “Apple” range have been completely redesigned by Biema to offer vastly improved cooling, efficiency and circuit protection. This range is designed to function as a stereo or high power single channel amplifier for use in foreground sound reinforcement ie: pubs, clubs, cinemas and multi-function venues.
  • Page 2: Front Panel

    A 4155 PA Amplifier Stereo 2x150W Front Panel 1. Mains Switch When you first press the switch, a soft start circuit will run to avoid a surge strike. In about 3-4 seconds there will be a click to indicate that the soft start has finished.
  • Page 3: Rear Panel

    A 4155 PA Amplifier Stereo 2x150W Rear Panel 1. Mains Power Connector (with fuse socket) 2. CH-A/CH-B Output Connector Use Banana plugs or bare wire for the speaker connection through binding posts 3. Ground/Lift Switch 4. CH-A/CH-B Input Connector Use a 6.35mm connector or 3 Pin XLR connector.
  • Page 4: Specifications

    A 4155 PA Amplifier Stereo 2x150W Specifications Output Power 8Ω: 2x150W RMS Output Power 4Ω;: 2x220W RMS Frequency Response: 10Hz - 50KHz -1.5db Imput Sensitivity: 1V Signal to Noise Ration: >90dB Crosstalk at rated power 8Ω 1kHz: >70dB Damping factor f=1kHz 8Ω: >150 Slew rate internal: 30VµS...