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
Bryston impressed the audiophile community with an ultimate fully active loudspeaker system that let 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 our 7B³ and 4B³ amps, it can also be used to power any 3 channels such as the front LCR in a home theatre.
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
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