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The Bryston PowerPac 300 amplifier, is a no-compromise, modular, single channel power amplifier delivering 300 watts at 8 Ohms, or 500 watts into 4 Ohms. The PowerPac 300 is a modular monaural version of our very popular 4B SST stereo amplifier but designed to be utilized in applications where portability, sound quality and flexibility are of prime importance.

The PowerPac 300 is a perfect choice for use as a portable power amplifier which can be attached directly to the rear of your loudspeaker. This provides for the use of very short speaker leads resulting in a much improved loudspeaker/amplifier interface. The PowerPac 300 can also be bolted on the wall for utilization in audio/video surround systems (left/right/center/rears) where a non-conspicuous power module is required. A further application would be in multi-room audio systems where single or multiple amplifiers are needed to provide music in adjacent rooms. Finally, with the recent popularity in passively or actively amplifying the individual drivers in your stereo loudspeakers the Bryston PowerPac 300 would be ideal for use in this capacity.


  • Allows direct attachment or adjacent placement to loudspeakers
  • On-wall mounting
  • Easy application in any multiple driver active or passive stereo system
  • Balanced or unbalanced operation at the flick of a switch
  • Gold plated 5-way banana jacks, RCA and XLR connectors
  • Ground lift switch to reduce annoying hum
  • Level control adjustment
  • Detachable power cord
  • Power Output: 300 watts into 8 ohms, 500 watts into 4 ohms
  • Gain 29dB (Unbalanced), 23dB (Balanced)
  • Distortion < 0.007% from 20kHz at 300 watts, IM or THD
  • Noise >110dB below rated output
  • Slew Rate > 60 volts per millisecond
  • Power Bandwidth < 1Hz to over 100kHz
  • Input Sensitivity (Unbalanced) 1 Volt in = 100 watts at 8 ohms, 1.5 Volts in = 300 watts into 8 ohms
  • Input Sensitivity (Balanced) Selectable 1V or 2V in = 100 watts at 8 ohms, Selectable 1.73V or 3.46V in = 250 watts into 8 ohms
  • Input Impedance 50 Kohms unbalanced, 20 Kohms balanced
  • Over 2,640 cm/square of heatsinking
  • Regulated power supplies to all voltage gain stages
  • Gold plated input and output connectors
  • Switchable balanced XLR - 1/4" w/ two different gains
  • RCA unbalanced inputs
  • Remote power turn-on 12V, AC/DC (optional)
  • Dimensions LxWxH = 17" x 8.4" x 4.5", 43x21x11.5 cm

Manufacturer: Bryston

This page first created on: 27/06/2007

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