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9BSST
POWER AMPLIFIER
OWNER’S MANUAL
UPDATED 2007-01-08
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9BSST FIVE CHANNEL POWER AMPLIFIER Table of Contents General Introduction Page 1 Instalation and Ventilation Rear Panel Input Settings/Connections Page 2 Setting Input Selector Switch Balance Input Connector Configuration Setting Polarity Setting Input Sensitivity Output Binding Posts and Polarity Page 3 Front Panel Description Page 4 LED Indicators (Power-up Sequence) LED Indicators (Operating Conditions) Power Control Pan
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9BSST FIVE CHANNEL POWER AMPLIFIER Introduction Thank you for choosing the 9BSST Five Channel Power Amplifier. Bryston welcomes any suggestions you may have, or comments regarding the operation of your amplifier. We consider you, our customer, to be Bryston’s most important resource, and your opinion is very much appreciated. Description The 9BSST is a modular design 5 x 120 Watts per channel audio power amplifier. Each channel selects
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9BSST FIVE CHANNEL POWER AMPLIFIER Rear Panel Input / Output Connections 1. Input Select Switch. Each 9BSST channel gives the user the option of switching between either balanced input or single ended input. 2. Balanced Input connector. ( Imp. 20k ) This input connector accepts standard ‘XLR’ or 1/4” TRS . Use quality, 100% shielded cables with gold plated connectors. ‘XLR’ type ‘TRS’ type ‘RCA’ type 3. Single Ended Input. ( Un-balanced input ) ( Im
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5/8” 5/16” 9BSST FIVE CHANNEL POWER AMPLIFIER 6. Output binding posts The RED binding post is connected to the amplifier output. Connect to this post the (+) terminal on the loudspeaker. The BLACK binding post is connected to signal ground. Connect to this post the (-) terminal on the loudspeaker. When the polarity switch is set for 0 degrees (normal operation ) the output at the RED binding post is in phase with the input signal. When
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9BSST FIVE CHANNEL POWER AMPLIFIER 2 1 Front Panel 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 L
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9BSST FIVE CHANNEL POWER AMPLIFIER REAR POWER ENTRY PANEL Power Control Panel 1. Master circuit - breaker. The 9BSST uses a magnetic-trip circuit breaker (1) to protect the amplifier. This switch should be ‘OFF’ when installing the 9BSST. When switched ‘OFF’ all A/C power is removed from the amplifier, including standby power. The circuit breaker is not the day to day power switch and should be switched and left ‘ON’ after the installation
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9BSST FIVE CHANNEL POWER AMPLIFIER Rack Mounting Instructions The 9BSST 19” version may be rack mounted with or without the ability to remove the channels. If removal of the chan- nels is desired then the shipping screws securing the channels need to be removed. REMOVE 4 REMOVE 3 6-32 SCREWS 3-32 SCREWS FROM THIS FROM THIS SIDE SIDE TOP VIEW Removing the channels makes rack REMOVE ALL 6-32 mounting far easier as the chassis will SCREWS ON THE b
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9BSST FIVE CHANNEL POWER AMPLIFIER Typical 5.1 Home Theatre Setup HOME THEATRE PROCESSOR Powered Subwoofer 9BSST 5X120W/CH Center Right-Front Right-Rear Left-Rear Left-Front 7
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9BSST FIVE CHANNEL POWER AMPLIFIER Typical Band-pass Noise Typical THD+N Harmonic Content Power supply artifacts are all below -95 dBu balanced input with 23dB gain shown The harmonic content of the 9BSST is all even order. dBu: dB relative to a reference of 0.7746 Volts Typical Phase Response Typical Frequency Response 8 ohm 120w<.01dB 20Khz. 4 ohm 200w<.1dB 20Khz. 4 ohm 200w 8 ohm 120w 9
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9BSST FIVE CHANNEL POWER AMPLIFIER Typical IMD Sweep Typical THD+N Sweep Graph shows that distortion is essentially unaffected by load. 4v balanced input shown. 4 ohm 200w 4 ohm 200w 8 ohm 120w 8 ohm 120w Damping Factor Typical Crosstalk 8 ohm reference channel 2 reading with channels 1 & 3 driven to 120w into 8 ohms channel 2 reading with channels 1 & 3 driven to 400w into 4 ohms 10
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6B/9B AMPLIFIER BRIDGED MODE HOOKUP The same signal is fed into both amplifier channel inputs via a “Y” adaptor cable. Note that the POLARITY of To SOURCE SIGNAL one channel is the inverse of the other. THIS IS ESSENTIAL for the amplifier to operate in bridged mode. Failure to INVERT one of the channels relative to the other will result in zero output. It does not matter which channel is set to zero degrees and which one is set to 180 degrees, however, as long as they are different. When bri
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9BSST 9B SST FIVE FIVE CHANNEL CHANNEL POWER POWER AMPLIFIER AMPLIFIER Technical Specifications Power Output 120 watts per channel into 8 ohms 200 watts per channel into 4 ohms Gain Select and Sensitivity 29dB - 1.1Vin = 120W @ 8 Ohms - (1V Position) 23dB - 2.2Vin = 120W @ 8 Ohms - (2V Position) 17dB - 4.4Vin = 120W @ 8 Ohms - (4V Position) Input Impedance 50 Kohms single ended 20 Kohms balanced
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IMPORTANT SAFETY INSTRUCTIONS The lightning flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of un-insulated “dangerous voltage “ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompan
