"Bryston 4B SST²" (5500€ rrp 2011year, Today 7700€ (4B³) - is a reference-grade dual-mono power amplifier engineered for exceptional linearity, high current delivery, and long-term reliability.

Designed with a fully discrete Class AB topology, it remains stable into demanding loudspeaker loads while maintaining extremely low distortion across the entire power range.


Technical Specifications:

* Power Output: 2x300W @8ohm , 2x500W @4ohm;
* Bridged Mono: 1x900W @8ohm
* Voltage Gain: 23dB (2V) or 29dB (1V)
* Input Sensitivity: 1 V for rated output
* Input Impedance: 20 k (Balanced XLR) / 60 k (Single-ended RCA)
* Frequency Response: 1 Hz – 100 kHz (0.1 dB)
* THD: <0.005%
* IMD: <0.005%
* Signal-to-Noise Ratio: >110 dB
* Damping Factor: >500 @ 20 Hz@8ohm
* Dimentions: 48.25 x 13.3 x 43.8 cm
* Weight: 27kg
* 20Year Warrianty: Up 2031year






Design Features:

* Fully discrete Class AB circuitry;
* Dual-mono architecture with independent power supply rails for each channel;
* High-current output stage with excellent low-impedance drive capability;
* Large toroidal power transformer and high-capacity power supply;
* Balanced XLR and single-ended RCA inputs with rear-panel input selection;
* Built and hand-assembled in Canada;

26dB or 29 dB voltage gain makes the 4B SST² easy to integrate with high-end DACs with preamplifiers while providing an excellent balance between input sensitivity, dynamic headroom, and low noise. Renowned for its neutral, transparent presentation and exceptional loudspeaker control, the 4B SST² has earned a reputation in both professional studios and high-end audio systems.

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