Bryston - 28B³ - Monoblock Power Amplifier

The 28B³ is Bryston’s flagship monoblock amplifier, engineered for listeners who demand uncompromising power, authority, and transparency from their audio system. Built around Bryston’s Cubed Series platform and advanced patented Salomie input stage technology, the 28B³ delivers immense dynamic capability while maintaining exceptional control, clarity, and musical refinement.

What separates the 28B³ from conventional high-power amplifiers is how effortlessly it maintains composure under demanding conditions. Massive bass remains tight and controlled, imaging stays stable during complex passages, and the amplifier preserves tonal neutrality without sounding sterile or aggressive. Its fully balanced architecture, oversized power supply, and convection-cooled chassis all contribute to remarkable low-noise performance and long-term reliability.

With 1000 watts into 8 ohms and up to 1800 watts into 4 ohms, the 28B³ is designed to drive virtually any loudspeaker with authority and ease. Built in Canada and backed by Bryston’s legendary 20-year warranty, it’s a true reference-level amplifier created for world-class systems.

Available in Silver or Black finishes.

FEATURES

• Flagship Reference Monoblock Power Amplifier
• Bryston Cubed Series Technology
• Patented Salomie Input Stage Circuitry
• Balanced XLR and Single-Ended RCA Inputs
• Switchable Gain Settings (23dB / 29dB)
• Fully Convection Cooled Design
• No Fans or Moving Parts
• Machined and Anodized Aluminum Chassis
• Regulated Power Supplies for Voltage Gain Stages
• SoftStart Microprocessor Controlled Startup Circuit
• DC Trigger Input for Automated Power Control
• Massive Toroidal Power Transformer Design
• Dual Binding Post Pairs
• Ultra Low Noise and Distortion Design
• Designed and Manufactured in Canada
• Legendary 20 Year Bryston Warranty

SPECIFICATIONS

• Amplifier Type: Monoblock Power Amplifier
• Class of Operation: Class AB
• Power Output: 1000W @ 8Ω / 1800W @ 4Ω
• THD + N: <0.005% (20Hz–20kHz @ 1000W, 8Ω)
• Frequency Response: <1Hz – 100kHz (-3dB)
• Noise:
  • RCA: -117dB
  • XLR: -119dB
• Input Impedance:
  • Unbalanced: 7.5kΩ
  • Balanced: 5kΩ / Leg
• Gain Settings: 23dB / 29dB Selectable
• Slew Rate: >60V/µS
• Damping Factor: >300 @ 20Hz (8Ω)
• Inputs: Balanced XLR / Single-Ended RCA
• Speaker Outputs: Dual Binding Post Pairs
• Cooling System: Fully Convection Cooled
• Standby Power Consumption: <500mW
• Dimensions: 17” or 19”W x 8.25”H x 20”D
• Weight: 94 lbs / 42.6 kg
• Faceplate Options: Silver or Black
• Manufacturing: Designed and Manufactured in Canada