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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