7B SST Series Amplifier

Power Control

1. Master circuit - breaker.

 

 

The 7B 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 to 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 signal. 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 7B 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 7B SST amplifier, then plug the other end to an appropriate 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 7B SST amplifier.

B. “Auto” is used when the 7B 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

3

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

 

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 7B 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.

PUSH

 

 

Control voltage wire preparation

 

Control Voltage source

 

 

 

for screw terminals

 

4 to 12v ac or dc

fig W

 

separate 1”

 

 

 

 

 

RS-232

 

EXP.

 

 

18 to 22

SP1-

gage

SERIALNUMBER

 

12VTRIG.OUT

wire

OPT1

OPT2

 

 

 

 

 

AUX.IR

 

 

120V

 

 

 

 

 

 

 

 

 

 

 

60Hz

 

 

MUTE

C ON/OFF

F2A250V

 

 

20W

1/4” strip

to other voltage controlled devices

Note:

The ‘OUT’ terminals are connected to the ‘IN’ terminals once the 7B 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 7B SST control circuitry itself draws less than 2 mA from the control current when operating.

5

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Image 7
Bryston 7B SST owner manual Power Control, Fig W

7B SST specifications

The Bryston 7B SST is a high-performance power amplifier renowned for its exceptional sound quality and robust build. As a part of Bryston’s SST (Super Silent Technology) line, the 7B SST represents a culmination of innovative engineering and unwavering dedication to audio fidelity, making it a favored choice among audiophiles and professionals alike.

One of the standout features of the 7B SST is its impressive power output, delivering 800 watts per channel into 4 ohms and 400 watts per channel into 8 ohms. This ensures that it can drive even the most demanding loudspeakers with ease, offering the headroom necessary for dynamic music playback. The amplifier employs a fully balanced differential design, minimizing noise and distortion, which results in cleaner, more accurate sound reproduction.

The 7B SST utilizes advanced technologies such as Bryston’s proprietary output devices, which contribute to its high performance and reliability. These output devices are designed to handle higher current levels, reducing the chances of clipping and ensuring that high volumes can be achieved without loss of quality. Additionally, the amplifier features a unique design that allows it to maintain stability and performance across a wide range of speaker impedances.

Thermal management is another key aspect of the 7B SST’s design. The unit is equipped with a robust heat sink system that allows for efficient dissipation of heat during operation, ensuring that the amplifier remains cool even under strenuous conditions. This is complemented by a toroidal transformer that provides excellent voltage regulation while minimizing electromagnetic interference.

Connectivity options on the 7B SST are versatile, including balanced XLR and single-ended RCA inputs. This flexibility allows for seamless integration into various audio systems, whether in home theaters or professional studio settings. The amplifier also boasts an impressive signal-to-noise ratio, providing a silent background for delicate musical details to emerge.

In summary, the Bryston 7B SST is a powerful amplifier that combines cutting-edge technology with exceptional performance characteristics. Its ability to deliver high-quality sound, even under demanding conditions, makes it a prized asset for any serious audio setup, ensuring that users experience their music as the artist intended. Its robust construction and reliability further underscore Bryston's reputation for quality in the world of audio amplifiers.