3B SST and 4B SST Series Amplifiers

Power Control

1. Master circuit - breaker.

 

 

The SST amplifier uses a magnetic-trip circuit breaker (1) to protect the amplifier.

 

 

This switch should be ‘OFF’ during installation. When switched ‘OFF’

 

 

all A/C power is removed from the amplifier, including standby power.

 

 

The circuit breaker is not the power switch and should be switched and left ‘ON’ after the

 

 

installation is complete.Use the ‘SST POWER” switch or an external control voltage to

 

 

Power-up or Power-down the amplifier.

 

 

Should the breaker trip, lower or remove the amplifier input signals. Switch the breaker to

 

 

the ‘ON’ position. Then power the unit up normally.

1

2

The circuit breaker must be ‘ON’ at all times for the SST amplifier to operate.

 

 

2. AC power input.

On the rear panel is provided a high current plug for the power cord receptacle. Check that the voltage rating on the label conforms with your locality. With the circuit breaker ‘OFF’ insert the power cord into the SST amplifier, then plug the other end to an approprate A/C power outlet.

3. Power-Up ( Local / Auto switch. )

A. In “Local” position either the front panel ‘SST POWER” switch or an external voltage controls the power-up of the SST amplifier.

B. “Auto” is used when the SST amplifier is powered from a switched power outlet. The ‘SST POWER’ switch and / or control voltage will function normally

after the initial power up.

4. External control voltage power up ( Local / external switch.)

4

3

A. To power-up the SST amplifier using an external control voltage,

Supply a 4v to 12v A/C or DC control voltage to the ‘IN’ terminals of connector ( 5 ).

Use paired wire of 22 to 18 gage sufficient in length between the source device and the SST amplifier. (see ‘W’ ) Select switch (4) to “External”. The amplifier will now power-up only when the control voltage is present (on). Immediately following power up, the control voltage will appear at the ’OUT’ terminals of connector (5) for the control of other equipment.The removal of the control voltage (0v) causes the amplifier to turn ‘off’ and the control voltage at the ‘OUT’ terminals is interrupted.

B. In the“Local” setting of switch (4) the SST amplifier will ignore the control voltage, and power up only by using the front panel ‘SST POWER’ switch, or as in section 3 above. If a control voltage is present at the ‘IN’ terminals it will still be available at the ‘OUT’ terminals after the power-up sequence.

Control Voltage source

4 to 12v ac or dc

 

Control voltage wire preparation

fig W

for screw terminals

separate 1”

 

18 to 22

 

gage

 

wire

1/4” strip

to other voltage controlled devices

Bryston part number CO-110A-11104

Note:

The ‘OUT’ terminals are connected to the ‘IN’ terminals once the SST amplifier has powered-up.

The control current is determined by the source equipment. The carrying current of the ‘OUT’ relay is 2 amps. The SST control circuitry itself draws less than 2 mA from the control current when operating.

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Bryston 3B SST, 4B SST owner manual Power Control, Fig W

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.