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Bryston 21B³ 3-Channel Amplifier

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Bryston impressed the audiophile community with an ultimate fully active loudspeaker system that lets you choose your amplifiers. Listeners were free to build 6-channel systems any way they liked. Now Bryston introduces the 21B³-an amplifier dedicated to bringing Cubed Series excellence to an easy-to-manage package. Each 21B³ has 3 channels. One is rated at 600 watts, the other two are rated at 300 watts each. Active loudspeaker customers will use the high-powered channel for the bass section and smaller channels for the midrange and high-frequency sections of their 3 way systems. Since the 21B³ is based on our 7B³ and 4B³ amps, it can also be used to power any 3 channels such as the front LCR in a home theatre.

Features

  • Balanced XLR and Single-ended RCA input
  • 3 Channels each with fully independent power supplies including transformers
  • 600W into 8 ohms (and up to 900 into 4 ohms) for one channel. Two more channels each rated at 300W into 8 ohms and 500W into 4 ohms.
  • The patented Salomie circuit found in all Cubed Series amplifiers
  • Switchable gain (23dB or 29dB)
  • Fully convection-cooled means no noisy fans
  • Machined and anodized aluminum enclosure and dress panel
  • Less than 500mW standby power consumption
  • SoftStart microprocessor-controlled startup sequence won't trip circuit breakers
  • DC trigger for automated turn on and turn off
  • Legendary Bryston 20-Year Warranty

Options

  • Silver or black faceplate
  • 17” or 19” faceplate (non-rack mountable) 19" comes with front-mounted handles

 

Specifications

Dimensions- Inches: 17 or 19 W x 8.1 H x 16.8 or 18.4 (with front handles) D

Weight- 91 lbs | 41 kg

Freuqnecy Response- <1Hz - 100kHz: -3dB

THD+N (20Hz-20kHz @ Rated Power, 8Ω)- <0.005%

Power Output (per channel)- CH 1: 600W @ 8Ω | 900W @ 4Ω

CH 2&3: 300W @ 8Ω | 500W @ 4Ω

Noise- RCA: <-115dB

XLR: <-116dB

Input Impedance: Unbalanced 7.5kΩ

Balanced 5Ωk/leg

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