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Biema PA Amplifier Stereo 2x250W

SKU : A4157

RRP: $625.00
Our Price: $513.36
Less: $111.64


  • Description
  • Reviews

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 high power stereo (non-bridgeable) 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.
The protection circuitry employed ensures the integrity of the amplifier during overload condition, output terminal short circuit and output clipping. Each channel is fitted with a recessed front mounted volume level. Inputs are via balanced 3 pin XLR or unbalanced 6.35mm jack. Output connections are made via binding post or heavy duty Speakon connector.


  • Rugged heavy duty construction
  • 19” rack mount
  • Earth lift switch
  • 3 pin XLR and 6.35mm inputs.
  • Short circuit protection with indicator
  • Overload protection with indicator
  • Clipping prevention circuitry with indicator
  • Variable speed fan forced cooling
  • Muting circuit for switch on/off


  • Output Power 8Ω: 2x250W RMS
  • Output Power 4Ω;: 2x380W 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
  • Protection: Short circuit, DC fault AC line fuses, Thermal cutoff
  • Indicators: Power (blue), Clip (red), Protection (yellow)
  • Cooling: Variable speed fan
  • Front panel controls: Level (Channel A, Channel B), Power switch
  • Rear panel controls: Ground/lift switch
  • Connectors: 6.35mm input, XLR input, Speakon output, Binding post output
  • Power consumption (half power 8Ω): <380W
  • Power supply: AC115/230V 50-60Hz
  • Dimensions(WxDxH): 482x314x88
  • Weight: 13.1kg

*Specifications subject to change without notice

  • Model: A4157
  • Brand: Biema

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