3Bsst & 4Bsst POWER AMPLIFIERS

POWER CONTROL

OPERATION contd.

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.

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2

N.B. 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 con-

 

 

 

 

 

 

 

 

 

 

trols 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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

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

4

 

 

3

 

 

 

 

 

A)To power-up the SST amplifier using an external control voltage and supply a 4v to 12v

(AC 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 "Control Voltage Wire Preparation" illustration below below).

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 con- trol 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

Control voltage wire preparation

for screw terminals

4 to 12v ac or dc

separate 1”

 

 

18 to 22

 

gage

 

wire

1/4” strip

 

Bryston part number CO-110A-11104

to other voltage controlled devices

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 4BSST, 3BSST owner manual Operation contd, Master circuit breaker, AC power input, Power-Up Local / Auto switch

3BSST, 4BSST specifications

The Bryston 4BSST and 3BSST are exceptional power amplifiers that embody the premium quality and performance standards synonymous with the Bryston brand. Renowned for their robust build and superior audio fidelity, these amplifiers are designed for both audiophiles and professionals who demand excellence in sound reproduction.

The Bryston 4BSST is a higher-powered model capable of delivering 300 watts per channel at 8 ohms and easily transitioning to 500 watts per channel at 4 ohms. This amplifier is perfect for driving larger speakers and creating a more dynamic listening experience. The 3BSST, on the other hand, provides a slightly more reserved output of 150 watts per channel at 8 ohms and 250 watts at 4 ohms, making it an excellent choice for smaller systems without compromising on sonic clarity.

One of the key features of both models is the SST (Special Serial Technology) Mosfet output stage, allowing for rapid response times and low distortion rates. This technology ensures that the audio signal remains clean and clear, even at high volumes. The amplifiers employ an innovative parallel push-pull output design, which not only bolsters dynamic range but also enhances the overall soundstage.

In terms of construction, Bryston amplifiers are built to last. The chassis is made from heavy-gauge steel with a baked enamel finish that not only provides a sleek and professional appearance but also contributes to overall durability. Moreover, the 4BSST and 3BSST feature a unique thermal management system that uses extensive heat sinks to maintain optimal operating temperatures, thus ensuring reliability during prolonged use.

Another significant characteristic of both amplifiers is their low noise floor. This trait is particularly important for high-resolution audio systems, as it allows for more subtle details to come through, providing an immersive listening experience. They also include Bryston’s signature 20-year warranty, reflecting the company’s commitment to quality and customer satisfaction.

For connectivity, both models provide balanced XLR and unbalanced RCA inputs, accommodating a variety of audio sources and setups. Their simple, clean interfaces make them user-friendly while still providing the performance flexibility that seasoned audio enthusiasts seek.

In summary, the Bryston 4BSST and 3BSST amplifiers exemplify the pinnacle of audio engineering, showcasing an unmatched blend of power, clarity, and durability. Whether you are setting up a high-end home theater system or a professional studio, these amplifiers are equipped to deliver exceptional sound quality for years to come.