Bryston 21B³ (Cubed) 3 Channel Power Amplifier

Bryston

  • $12,195.00
    Unit price per 


The Bryston 21B³ (Cubed) 3 Channel Power Amplifier impressed the audiophile community with the ultimate fully active loudspeaker system that lets you choose your own 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 their 7B³ and 4B³ amps, it can also be used to power any 3 channels such as the front LCR in a home theatre.

For availability... 

or call 847-217-8985

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

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
Frequency 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 5kΩ / leg

Please call me at 847-217-8985 to discuss availability or feel free to send me an email. Just let me know what model you are interested in and I will get back to you as soon as possible!

Please don't hesitate to reach out.

Send an email to Tim

Or give me a call at 847-217-8985


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