Audio Database
4B-ST
Commentary

This is a mid-sized stereo power amplifier in the BRYSTON lineup.

The circuit system uses Bryson's unique quad complimentary service circuit, which realizes low distortion rate, excellent linearity and high speed which cannot be achieved by general Darlington connection.


There are 2 color variations of black and silver.

Model Rating
Type Stereo power amplifier
Output 400W + 400W (4 Ω)
250W + 250W (8 Ω)
Damping factor 500 (20 Hz, 8 Ω)
Input sensitivity RCA : 1.4V/50k Ω
1/4 Phone, XLR3 : 2.8V/20k Ω
* XLR3 is number 2 hot.
Slew rate 60 V / μ sec or More (Parallel)
120 V / μ sec or More (Series)
Distortion factor Not more than 0.007%
Signal-to-noise ratio 106dB
Frequency characteristic 1 Hz to 100 kHz (250W)
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 1350W maximum
External dimensions Width 483x Height 148x Depth 427 mm
Weight 18kg