Power Capabilities:

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

Features:

• 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

Options:

• 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)

Specifications:

• Harmonic Distortion: ≤ .005% from 20Hz to 20kHz at 300W
• Noise: ≤ -119dB @ full bandwidth
• Slew Rate: >60V/µS
• Power Bandwidth: <1Hz to >100kHz
• Damping Factor: >500 at 20Hz (8Ω)
• Switchable Gain: 23dB or 29dB

Reviews:

• “The 4B³ is a control freak in terms of grabbing hold of your speakers’ drivers and maintaining bass control, depth and power.” – Edgar Kramar, Audio Esoterica
• “These dig right to the heart of the music and result in one of the best all-round power amplifiers I have encountered at this price.” – Adam Smith, Hi-Fi News & Record Review

Awards:

• SoundStage Products of the Year