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Table of Contents
Related Manuals for Bryston 28BSST
Summary of Contents for Bryston 28BSST
- Page 1 POWER AMPLIFIER OWNER’S MANUAL UPDATED 2006-12-01...
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Page 2: Table Of Contents
Table of Contents General Introduction Description Installation and Ventilation Rear Panel Input Settings/Connections Setting Input Selector Switch Balance Input Connector Configuration Setting Input Sensitivity Output Binding Posts Power Control Panel Master Circuit -Breaker AC Power Input Local/Auto Switch Front Panel Description LED Indicator (Power-up Sequence) LED Indicator (Operating Conditions) External Dimensions Technical Specifications Important Safety Instructions & Warranty Information Page 1 Page 2 Page 3 Page 4 Page 5... -
Page 3: General Introduction
28B-SST Amplifier Introduction Thank you for choosing the 28B-SST C-SERIES mono-block 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 28B-SST The 28B-SST is a single channel 1000 Watt audio power amplifier. The 28B-SST selects a balanced (3 pin XLR or ¼" phone plug) or single ended (RCA/phono plug) input. A gain of 29dB or 23dB may be selected. The 28B-SST includes ‘soft start’ power control circuitry to eliminate high inrush currents when A/C power is applied. The power up or turn-on of the 28B-SST may be activated by a remote control voltage 4v to 12v ac or dc. Warranty ( see back page for details ) Shipping Box & Packing Material Please keep the original shipping box and all packing material. This will ensure the amplifier is protected in future transport. In the unlikely event you have a problem and must return it for service you must use the proper packing material. Ship the amplifier only in the original packing material, as the unit is not insurable by carriers otherwise. Installation ( see rack mounting section if applicable ) Ventilation. The most important installation consideration is ventilation. The 28B-SST amplifier is convection cooled. -
Page 4: Rear Panel Input Settings/Connections
1. Input Select Switch. The INPUT SELECT switch gives the user the option of switching between either balanced input or single ended input. 2. Input Sensitivity Selection. This switch sets the gain of the amplifier to either 23dB or 29dB. The optimum gain setting will depend upon the source pre-amp operating level, and or personal preference. Use the 23dB setting with any systems where the volume control rotation is limited to the bottom half of the control or less. 3. Balanced Input connector. (input impedance 30KΩ each leg) When 3-pin XLR jacks are used, pin 1 is ground, pin 2 is positive and pin 3 is negative. If your 28B-SST is equipped with combination XLR/¼" phone jacks (as shown in the illustration above), the XLR jack will have the same pinout and on the phone jack the TIP will be positive, RING is negative and the SLEEVE is ground.. Use quality, 100% shielded cables with gold plated connectors. 4. Single Ended Input. ( Un-balanced input) ( Imp. 50KΩ ) This input connector accepts standard ‘RCA’ or ‘Phono’ connectors. Use quality, 100% shielded cables with gold plated connectors. Balanced input Vs Single ended input: The balanced input requires a balanced pre-amp source. Balanced systems provide noise rejection from external electrical interference, so cable length can be very long ( 50m or longer ). -
Page 5: Output Binding Posts
Never connect either output in parallel with another amplifier. N.B. The minimum recommended loudspeaker load is 4 ohms. The Output binding posts provide three different interconnect options. Combinations may be used when bi-wiring. See fig- ure 2 below. Cables should be kept as short as practical and should never be terminated with connectors that may become confused for AC power connectors. Cables should be dressed away from input and power cables. ● Banana plugs offer a quick disconnect option. Before inserting a banana plug into the binding post be sure to tighten the post nut to avoid rattling and to provide full insertion of the banana plug. Gold plated locking banana plugs are available from Bryston. ● S pade lugs provide high contact area and secure fastening. Lugs should be gold plated. See diagram for details. Post diameter is 5/16’ ( 8mm ), lug width 5/8” (16 mm). Gold plated spade lugs are available from Bryston. Stripped bare wire up to 3 gage can be inserted through the hole in the binding post and held in place by tightening ● the post knob. Additional tightening pressure can be achieved using a coin in the slots of the knob. Do not over tighten or the binding post may become damaged. Note that copper wire is malleable and may require further tightening after the initial installation. -
Page 6: Power Control Panel
7. Master circuit - breaker. The 28B-SST amplifier uses a magnetic-trip circuit breaker 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 28B-sst front panel 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 (also see section 9 below). Switch the breaker to the ‘ON’ position. Then power the unit up normally. The circuit breaker must be ‘ON’ at all times for the 28B-SST amplifier to operate. 8. 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 (item 12 in figure 1, page 2) conforms with your locality. With the circuit breaker ‘OFF’ insert the power cord into the 28B- SST amplifier, then plug the other end to an appropriate A/C power outlet. Switch the circuit breaker to on and observe the LED labeled "Line Voltage Status Indicator". 9. LINE VOLTAGE STATUS INDICATOR This LED will be on anytime the amplifier is plugged into a source of electrical power and the circuit breaker (#8) is ON. -
Page 7: Front Panel Description
FRONT PANEL (refer to illustration above) 13. ‘28B-SST’ power switch The front panel label ‘28B-sst’, is a push on push off switch used to apply or remove AC line power to the soft start circuitry. ( Note: the rear circuit breaker must be on for the amplifier to power-up) 14. LED Indicators The 28B-SST has an LED indicator to monitor the following conditions: indicates the amplifier is turned off. nlit indicates the amplifier is muted (as in a power-up sequence) - i ndicates the amplifier operation is normal. Reen - indicates the amplifier clipping. lashinG indicates thermal shutdown. RanGe Power up sequence After pushing the '28B-SST POWER' switch, the LED will turn from unlit to red (mute). When the power supply has sta- bilized the amplifier will come out of mute and the LED will change to green (normal operation). Unlit LED ( power off ) The 28B-SST LED when unlit indicates no A/C mains power is present and the amplifier probably needs only to be powered on or the rear panel circuit breaker is switched off. Should the amplifier not power on when the power switch is pushed see the installation instructions. -
Page 8: External Dimensions
28B-SST Amplifier... -
Page 9: Technical Specifications
Technical Specifications Power Output 1000 watts into 8Ω Gain (Sensitivity) Select "29 dB" gain setting = 1V sensitivity = "23 dB" gain setting = 2V sensitivity = Input Impedance Single ended: 30KΩ Balanced: 30KΩ each leg Distortion IM or THD+noise < 0.007% 20Hz to 20kHz at 1000 watts into 8Ω Noise Measured with input shorted - 20Hz to 20kHz. >110dB below rated output 29dB gain (- 75dBu) >113dB below rated output 23dB gain (- 78dBu) Slew Rate > 60 volts per microsecond Power Bandwidth < 1 Hz to over 100 kHz Damping Factor Over 300 at 20 Hz, ref. 8 ohms Dimensions: maximum dimensions for 19”w version with handles 48.3 x 20.5 x 52.1cm (19w” x 8.05”h x 20.525"d) See page 6 for more complete details Weight: approx. 36.4kg - 80 lbs Power Consumption & Heat Load Power consumption at Idle Max. heat dissipation at idle ... -
Page 10: Important Safety Instructions
Bryston authorized dealer to qualify for warranty service. The warranty is transferable from the original owner to a subsequent owner as long as a copy of the bill-of-sale from the original authorized Bryston dealer accompanies the re-sale. The copy of the bill of sale to any subsequent owner need ONLY include the Name of the Bryston Authorized Dealer and the Model and Serial number of the Bryston product The warranty will only be honored in the country of the original purchase unless otherwise pre-authorized by Bryston.