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Bryston 4B 3 Cubed Pro 300 Watt Stereo Power Amplifier

300w stereo power amp, 500w at 4 ohms, 1,000w bridged at 8 ohms

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Bryston Limited
Included with your purchase:
  • Free Tech Support
  • Free Extended Warranty
Our Price: $5,695.00

12-month financing with the Vintage King credit card

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Thanks to our relationship with Bryston Limited, this item should ship within 5-10 business days. Order now and it will be shipped via one of our three centrally located shipping hubs on the same day it’s received from the manufacturer. Email, chat or call 888.653.1184 for estimated ship date.

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Product Description
Additional Information
  • Product Description

    The Bryston 4B³ is a dual channel (stereo) amplifier which is acclaimed internationally as being suited for the finest and most sophisticated sound systems. It is currently our most popular Cubed Series model.

    Power Capabilities:

    • 300W into 8Ω
    • 500W into 4Ω
    • 900W into 8Ω (Bridged Mono)


    • Active extremely low distortion input buffer
    • Balanced and Single Ended audio inputs
    • Selectable gain at 23 or 29dB
    • Regulated power supplies to all voltage gain stages
    • Independent power supplies for each channel
    • Convection cooled and housed in a fully aluminum chassis.
    • No fans or other moving parts
    • Bridging switch configures amplifier into a single 900W Channel


    • Harmonic Distortion: ≤.005% from 20Hz to 20kHz at 300W
    • Noise below full output: -110dB single ended, -113dB balanced
    • Slew Rate: >60V/µS
    • Power Bandwidth: .5Hz to >100kHz
    • Damping Factor: >500 at 20Hz (8Ω)
    • Switchable Gain: 23dB or 29dB


    • Available with silver or black faceplate (3U + .55”)
    • 17” (without handles) or 19” (with handles) faceplate available (non-rack mountable)
    • Rack mountable Pro Edition available in black (see Cubed Pro for more details)
  • Additional Information

    Condition New
    Active or Passive Active
    Chassis 19-in. Rackmount
    Channels Dual-Channel
    Number of Inputs 2
    Number of Outputs 2
    Amp Wattage 1000w
    Impedance 4 or 8 Ohms
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