Front Panel

9BSST FIVE CHANNEL POWER AMPLIFIER

1. 'SST POWER' switch

The front panel label 'ST POWER', is a touch sensitive membrane switch used to apply or remove A/C line power to the 9BSST circuitry. Push firmly the center of the switch until the power-up sequence begins. Push again and the 9BSST will power-down. ( Note: the rear circuit breaker must be on for the 9BSST to power-up)

2. LED Indicators
Each 9BSST channel has a LED			indicator to monitor the following conditions:
Unlit	-	indicates channel has no power.
Red -		indicates channel is muted (power-up-down sequence)
Green	-	indicates channel operation is normal.
Flashing Red -		indicates channel clipping.
Orange -		indicates channel thermal shutdown.

Power up sequence

After pushing the 'SST POWER' switch, each channel led will turn from unlit to red (mute). When the power supplies have stabilized the channel will come out of mute and the led will change to green (normal operation).

Unlit led ( No power )

The 9BSST channel led when unlit indicates no A/C mains power is present at the channel. If all channel led indicators are unlit the 9BSST probably needs only to be powered on. A single led not lighting possibly indicates blown channel fuses.

When checking fuses switch off the circuit breaker on the rear panel, or unplug the power cord. Use only the specified quick-acting 4 amp 250V 5mm x 20mm fuses. See page 6 for the fuse locations.

Clipping ( flashing red )

Clipping occurs when the channel output level no longer can follow the level increase at the input (Over driven input con- dition). When a 9BSST channel is driven into clipping the channel led will change from green to red then back to green when the level is reduced ( Flashing Red ). Momentary clipping can be tolerated, however it indicates that maximum un- distorted power has been surpassed and potential speaker damage may result if overload conditions persist. Any ampli- fier that is constantly operated into clipping indicates a more powerful amplifier is needed for that application.

Thermal Shutdown ( orange )

The 9BSST channel has thermal shutdown circuitry to prevent damage due to overheating.

Should thermal shutdown occur, the channel will mute, and the channel led will turn orange indicating this condition. When the channel has cooled to a safe operating condition the channel will return to normal operation.

Persistent Thermal shutdown indicates steps need to be taken to increase airflow across the channel or channels heat sink. ( Also see installation section on ventilation ).

9BSST specifications

The Bryston 9BSST is a revered powerhouse in the realm of high-end audio amplification, offering audiophiles an unmatched listening experience through its impressive technical specifications and robust build quality. Esteemed for its pure, accurate sound reproduction, the 9BSST serves as a benchmark for solid-state amplifiers.

One of the standout features of the Bryston 9BSST is its power output, delivering 300 watts per channel into 8 ohms and 500 watts into 4 ohms, making it versatile enough to drive a wide array of loudspeakers. This substantial power ensures that even the most demanding speakers are adequately supported, capable of producing deep, thunderous bass alongside pristine high frequencies.

The amplifier is constructed with Bryston's legendary attention to detail and durability. Its all-steel chassis not only provides a rigid structure but also helps in minimizing electromagnetic interference, contributing to the overall audio purity. The 9BSST is also known for its warm, transparent sound signature, which can be attributed to its well-engineered Class AB topology. This design strikes an excellent balance between delivering high power and maintaining low distortion levels.

Moreover, the 9BSST incorporates advanced thermal management systems, including large heat sinks and robust cooling fans, ensuring reliable performance during extended listening sessions. This prevents overheating, which can adversely affect performance and longevity. In terms of connectivity, the amplifier comes equipped with balanced XLR and unbalanced RCA inputs, providing flexibility in system integration.

Bryston amplifiers are also recognized for their longevity, a feature reinforced by their impressive 20-year warranty. This commitment to quality is indicative of the brand’s confidence in their products. In addition, the 9BSST includes Bryston's unique "low-frequency cutoff" feature, which protects speakers from potential damage caused by high power surges at lower frequencies.

Overall, the Bryston 9BSST encapsulates the perfect synergy of power, precision, and reliability. Its robust engineering and exceptional sound quality make it a favorite among audiophiles and music professionals alike, solidifying its status as a top-tier choice in the high-end amplifier market. With its rich history and dedication to performance, Bryston continues to set the standard for high fidelity audio.