OPERATING BRYSTON 3B & 4B AMPLIFIERS IN BRIDGED MODE

“Bridged mode” refers to the combining or “bridging” of two amplifier channels into a single ampli- fier channel. The primary reason for doing this is to achieve a single amplifier channel with much greater output power. When two 3B channels or two 4B channels are bridged, the combined single channel will output up to 2 times the voltage and therefore, theoretically, 4 times the power of a single non-bridged channel. In practice, the actual output power achieved is limited by the capabil- ity of the power supply as well as the ability of the amplifier to dissipate the increased heat that is generated. It should also be noted that the load connected to a pair of bridged 3B or 4B channels should be 8 ohms or greater.

When two amplifiers channels are bridged into a single channel:

•Only one input is used: the LEFT channel (sometimes referred to as channel #1).

•The single input which is connected to the LEFT channel (Ch. 1) can be either balanced or un- balanced.

•The two BLACK binding post outputs are NOT used. Only the two RED binding post connec- tors are used. The LEFT (Ch. 1) binding post is the positive polarity connector and the RIGHT (Ch. 2) RED binding post connector is negative.

•The bridged output is floating or un-grounded. DO NOT CONNECT EITHER OUTPUT TERMI-

NAL TO GROUND.

•To engage bridged mode, put the MODE switch, located on the rear panel, into the BRIDGED position. Before doing so, however, make sure all input and output connections are correct for bridged mode operation.

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Bryston 4B SST, 3B SST owner manual Operating Bryston 3B & 4B Amplifiers in Bridged Mode
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3B SST, 4B SST specifications

The Bryston 4B SST and 3B SST power amplifiers are renowned in the audio industry for their exceptional performance and reliable build quality. Designed for both audiophile and professional applications, these amplifiers bring out the finest detail in music while delivering high power and low distortion.

One of the main features of the Bryston 4B SST is its power output capability. It can deliver up to 300 watts per channel into 8 ohms, making it an ideal choice for driving demanding speakers with ease. The 3B SST, while smaller, still offers impressive performance with 100 watts per channel into 8 ohms. This versatility means both amplifiers can accommodate a variety of audio setups, whether in a home theater or a high-fidelity stereo system.

The SST series incorporates Bryston’s proprietary amplifier technology known as “Squared” which allows for class A performance with an overall class AB operation. This design minimizes distortion and provides a warm, natural sound. Alongside this, the amplifiers feature a highly efficient, low-noise toroidal power transformer that contributes to their impressive transient response, allowing music to play with precision.

Another standout characteristic is the build quality. Both the 4B SST and 3B SST are constructed using a sturdy 17-inch faceplate made from aluminum, designed to withstand the rigors of both studio and home environments. The amplifiers also feature a uniquely designed heat-sink system that keeps temperatures in check during heavy operations, ensuring optimal performance without overheating.

Bryston amplifiers also boast a long lifespan, backed by a 20-year warranty on their products, which speaks volumes about their reliability and customer confidence. They include fully balanced input circuitry, allowing for low noise pickup and signal integrity over long cable runs.

Furthermore, the 4B SST and 3B SST are equipped with user-friendly features like RCA and XLR connections for flexible integration into a range of audio systems. With their transparent sound reproduction, high power output, and robust construction, the Bryston 4B SST and 3B SST amplifiers continue to be the preferred choice among audio enthusiasts and professionals alike. Their enduring legacy is rooted in their commitment to superior sound quality and long-lasting performance.
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