Works great and in very good physical condition. This amp powered my NS10’s for the past three years. Original packaging, double boxed, fully insured.

The Bryston 3B SST2 stereo amplifier, at 150 Watts per channel at 8 ohms, provides all the sonic virtues and the same high value as the more powerful 4B SST2 but in a package which is both compact and less costly. Historically, the 3B has found favor in a wide range of audio/video systems which call for medium to high amounts of power but wish to avoid sacrificing sonic accuracy and long-term reliability.

Power Output

• 8 Ohms (Stereo): 150 watts per channel
• 4 Ohms (Stereo): 250 watts per channel
• 8 Ohms (Bridged Mono): 400 watts [1, 2]

Performance & Audio Specs

• Frequency Response: 1 Hz to 100 kHz (less than 1 Hz to over 100 kHz power bandwidth) [1]
• Total Harmonic Distortion (THD+N): Less than 0.005% into 8 ohms, and less than 0.007% into 4 ohms from 20 Hz to 20 kHz [1]
• Signal-to-Noise Ratio: 110 dB below rated output at 29 dB gain [1]
• Damping Factor: Over 300 at 20 Hz into 8 ohms [1]
• Slew Rate: Greater than 60 volts per microsecond [1]

Gain & Connectivity

• Inputs: Selectable balanced (XLR) and unbalanced (RCA) inputs per channel
• Selectable Gain: 29 dB (1-volt setting) or 23 dB (2-volt setting)
• Input Impedance: 50k ohms single-ended, 20k ohms balanced [1, 2]

Physical Specifications

• Dimensions: 5.25 inches high by 19 inches wide by 12.5 inches deep (483 x 133 x 320 mm)
• Weight: 40 lbs (18 kg)
• Power Consumption: 90 watts at idle, up to 1096 watts at rated output [1, 2, 3]