Bryston 21B³ Cubed Series Three Channel Power Amplifier

The Bryston 21B³ three channel amplifier was crafted to provide superb amplification for your Bryston 21B³ Active Loudspeaker System. The Bryston 21B³ is essentially composed of a 7B³ and a 4B³ amplifier, which provides plenty of power for a single active loudspeaker. Two of these amplifiers will drive your active system with breathtaking ease and clarity.

Fully active loudspeaker systems dispense with passive crossovers found in conventional loudspeakers in favor of inserting the crossovers before the amplifier. The benefits include increased flexibility of filter shapes, the ability to make fine-grained adjustments resulting in improved on and off axis response (these are often competing objectives in passive loudspeakers), direct coupling of the amplifier to the driver (avoiding losses inherent in passive crossovers), and higher SLP with lower distortion. The Bryston Active Loudspeaker System combines decades of research into acoustics, electronics, amplification, and state of the art components to recreate your recordings with stunning realism.

Inputs: 3x Balanced Inputs (XLR or TRS), 3x Single Ended Inputs (RCA)

Power Capabilities:

• 1x 600W into 8Ω
• 2x 300W into 8Ω
• 1x 900W into 4Ω
• 2x 500W into 4Ω

Features:

• Designed to meet the power requirements of a single active loudspeaker
• Balanced and Single Ended audio inputs
• Selectable gain at 23 or 29dB
• No fans or other moving parts
• Regulated power supplies to all voltage gain stages
• Convection cooled and housed in a fully aluminum chassis
• Independent power supplies for each channel
• Energy storage power transformers maximize dynamic range

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• Harmonic Distortion: ≤ .005% from 20Hz to 20kHz at 135W
• Noise: ≤ -115dB @ full bandwidth
• Slew Rate: > 60V/µS
• Power Bandwidth: < 1Hz to >100kHz
• Damping Factor: > 500 at 20Hz (8Ω)
• Switchable Gain: 23dB or 29dB