Bryston 7B SST User's Manual
Contents
1. KS S 50 100 200 500 1k 2k 5k 10k Typical IMD Sweep 20k 0 009 0 008 0 007 0 006 0 005 0 004 0 003 0 002 0 001 4 ohm 900w 8 ohm 600w Me z 3k 4k 5k 6k 7k 8k 9k 10k 20k 11 Sla SI COLA 7B SST Series Amplifier Damping Factor 800 751 o 701 o 651 o 601 o 551 o 501 o 8 ohm reference 45 o 401 o no 351 o 301 o 251 o 201 o 15 o 10 o 5 o ne 50 100 200 500 1k 2k Sk 10k 20k Hz 12 7B SST Series Amplifier Technical Specifications Power Output 600 watts per channel into 8 ohms 900 watts per channel into 4 ohms Gain Select and Sensitivity 29dB 2 3Vin 600W 2 8 Ohms 1V Position 23dB 4 6Vin 600W 2 8 Ohms 2V Position Input Impedance 50 Kohms single ended 20 Kohms balanced Distortion IM or THD noise lt 0 005 20Hz to 20kHz at 600 watts into 8 W lt 0 007 20Hz to 20kHz at 900 watts into 4 W Noise Measured with input shorted 20Hz to 20kHz gt 110dB below rated output 29dB gain 75dBu gt 113dB below rated output 23dB gain 78dBu Slew Rate gt 60 volts per microsecond Power Bandwidth lt 1 Hz to over 100 kHz Damping Factor2. The SST POWER switch and or control voltage will function normally Pen Tn after the initial power up 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 DUT terminals of connector 5 for the control of other equipment The removal of the control voltage Ov 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 Control voltage wire preparation for screw terminals Control Voltage source 4 to 12v ac or dc y pa 1 18 to 22 gage TT wire 1 4 strip to other voltage controlled devices Bryston part number CO 110A 11104 Note The OUT terminals are connected to the IN terminals on
3. Over 300 at 20 Hz ref 8 ohms Dimensions LxHxD 19 version with handles 48 3 x 13 3 x 32cm 19 x 5 25 x 15 75 mounted rack depth 28cm 11 0 17 version 43 2 x 13 3 x 28cm 17 x 5 25 x 11 Weight approx 22kg 50 lbs Power Consumption 8 Heat Load At Idle 215 Watts Max Heat Dissipation 733 Btu Hr output 600W 8 ohms 1284 Watts Max Heat Dissipation 8 ohms 2333 Btu Hr output 900W 4 ohms 1980 Watts Max Heat Dissipation 4 ohms 3684 Btu Hr 13 BRYSTON 20 YEAR WARRANTY BRYSTON LTD P O BOX 2170 677 NEAL DRIVE PETERBOROUGH ONTARIO CANADA K9J 7Y4 Bryston products are warranted to be free from manufacturing defects for a minimum of twenty years from the original date of manufacture This includes parts labour and return shipping to the first owner and all subseguent owners Warranty coverage is automatic and commences with the original date of manufacture which is kept on file at Bryston In the event of a defect or malfunction Bryston will remedy the problem by repair or replacement as we deem necessary to restore the product to full performance This warranty is considered void if the defect malfunction or failure of the product or any com ponent part was caused by damage not resulting from a defect or malfunction or abuse while in the possession of the customer Tampering by persons other than factory authorized service personnel or failure to fully comply with Brysto
4. connector accepts standard XLR or 1 4 TRS Use guality 10095 shielded cables with gold plated connectors 3 Single Ended Input Un balanced input Imp 50k 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 The single ended or unbalanced input is provided for pre amps without balanced output Single ended cables should be kept to 20 7m or less In general never use longer cables than necessary never coil excess cable length and keep signal wires away from AC power or speaker cables 4 Input Sensitivity Gain Switch The optimum gain setting will depend upon the source pre amp operating level and or personal preference The 1v setting is used when the source is single ended or from a transformer coupled balanced source This is the home theatre setting for single ended or un balanced operation The 1v setting provides the most amplifier gain 29 dB 1v in 100w 8 ohms noise 110 dB The 2v setting is used when the sources output is actively Balanced This is the home theatre setting for balanced operation Or use this setting with any systems where the volume control rotation is limited to the bottom half of th
5. BRYSTON OWNER S MANUAL Instructions For Bryston SST Series Amplifiers Model 7B SST 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 Front Panel Description LED Indicator Power up Seguence LED Indicator Operating Conditions Power Control Panel Master Circuit Breaker AC Power Input Local Auto Switch Local External Switch Block Diagrams Typical Performance Graphs Technical Specifications Important Warranty Information 7B SST Series Amplifier Page 1 Page 2 Page 3 Page 4 Page 5 Page 8 Page 9 12 Page 13 Back Cover LG CL COLD 7B SST Series Amplifier Introduction Thank you for choosing the 7B SST 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 7B SST The 7B SST is a single channel mono 600 Watt audio power amplifier The 7B SST selects a balanced or single ended input and a gain of 29dB 1v or 23dB 2v may be selected The 7B SST includes soft start power control circuitry to elim inate high inrush currents when A C power is applied The power up or turn on of the 7B SST may be activated by a
6. E indicates channel thermal shutdown Power up seguence After pushing the SST POWER switch the LED will turn from unlit to red mute When the power supply has stabilized the amplifier will come out of mute and the LED will change to green normal operation Unlit LED No power The 7B SST LED when unlit indicates no A C mains power is present and the amplifier probably needs only to be pow ered on or the rear panel circuit breaker is switched off Clipping flashing red Clipping occurs when the channel output level no longer can follow the level increase at the input Overdriven input con dition When the 7B SST is driven into clipping the 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 amplifier that is con stantly operated into clipping indicates a more powerful amplifier is needed for that application Thermal Shutdown orange The 7B SST has thermal shutdown circuitry to prevent damage due to overheating Should thermal shutdown occur the amplifier will mute and the LED will turn orange indicating this condition When the amplifier has cooled to a safe operating condition the 7B SST will return to normal operation Persistent Thermal shutdown indicates steps need to be taken to increase airflow a
7. ce the 7B SST amplifier has powered up The control current is determined by the source eguipment 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 LG CL COL 7B SST Series Amplifie MODULE MUTE 65Vde 30Vde MODULE 1 SINGLE ENDED RED BINDING POST OUTPUT NON INVERTED BLUE BINDING POST al INPUT REGULATED DEDICATED HIGH INPUT gt pl Low BUFFER POWER VOLTAGE AND GAIN AMPLIFIER SUPPLY XLR OR SWITCH Sark PHONE INPUT 7 30VAC CLIPING p AND CURCUIT MONITOR SOFT START ae INPUT P ano LOGIC CONTROL MODULE MUTE 20Vde 7 65Vdc DEDICATED HIGH ee gt sd onal gt gt AMPLIFIER VOLTAGE SUPPLY SUPPLY 7 30VAC CLIPING REMOTE AND TRISGER CURCUIT an MONITOR JOUSTOG 7B SST Series Amplifier Da o Sous oero 10 110 12 130 o o 120 Typical Band pass Noise Power supply artifacts are all below 95 dBu balanced input with 23dB 2v gain shown 8 91 o o VT YT V dBu dB relative to a reference of 0 7746 Volts o 50 100 200 500 1k 2k Hz Typical THD N Harmo
8. cross the heat sink Also see instal lation section on ventilation Jod SEST COL 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 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 MOKE POEN external voltage controls the power up of the 7B SST amplifier STEAL AA IM AAS B Auto is used when the 7B SST amplifier is powered from a switched power outlet BEBE
9. e control or less The 2v setting provides an amplifier gain 23 dB 2v in 100w 8 ohms noise 113 dB The noise is referenced in dB below rated output Different input configurations result in slightly different noise readings The above noise ratings represent minimum readings actual readings may be better 5 Level Control pro models only The level control will attenuate the input signal level from OdB through 14dB Jod SEST COL 7B SST Series Amplifier 6 Output binding posts The RED binding post is the in phase amplifier output Connect to this post the terminal on the loudspeaker The BLUE binding post is the inverted phase amplifier output Connect to this post the terminal on the loudspeaker Note At no time should either output be connected to a ground or chassis Failure of the amplifier may result Never connect either output in parallel with another amplifier 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 1 Banana plugs offer a guick disconnect option Before inserting a banana plug into the binding post be sure to tighten the post nut to avoid rattling and to p
10. hort as practical Use guality wire and if runs are more than 3 meters use at least 12 gage wire The speaker binding posts will accept wire up to 3 gage in size Bryston offers speaker cables and amp interconnects for your application Check our website under producis cables www bryston ca for more information A C power Before plugging in the power cord be sure your 7B SST amplifier is specified for the correct a c voltage for your locality The voltage is listed on the label found at the upper right of the rear panel The circuit feeding the 7B SST should be suf ficient so as not to cause the circuit breaker to trip 15 amp min Note the 7B SST when delivering maximum power into a 4 ohm load will consume all the available power in a normal household circuit therefore a dedicated electrical circuit may be necessary with this situation Never lift the safety ground to the amplifier nor remove the ground pin from the plug Power line conditioners will not improve the 7B SST amplifier performance in fact most of the time they restrict the flow of current to the amplifier reducing performance at higher output levels Jod SEST COL 7B SST Series Amplifier Rear Panel Input Output Connections Fig 1 1 4 PHONE PLUG XLR TYPE BU RCA PLUG 1 Input Select Switch Each SST channel gives the user the option of switching between either balanced input or single ended input 2 Balanced Input connector Imp 20k This input
11. n operating instructions voids the warranty This warranty gives you specific legal rights and you may also have other rights which may vary from province to province and country to country BRYSTON SERVICE CANADA 24 STEINWAY BLVD UNIT 48 ETOBICOKE ONTARIO CANADA M9W 6T8 PHONE 416 675 2585 FAX 416 675 3103 BRYSTON SERVICE U S A 70 COVENTRY ST SUITE 5 NEWPORT VERMONT U S A 05855 PHONE 802 334 1201 FAX 802 334 6658 FOR BRYSTON SERVICE OUTSIDE CANADA CONTACT YOUR LOCAL DISTRIBUTOR OR CHECK OUR WEB SITE AT www bryston ca OR CALL BRYSTON DIRECTLY AT PHONE 705 742 5325 FAX 705 742 0882
12. nic Content 5k o a o o DO o o A S The harmonic content of the 7B SST is all even order a o o o o 4 o o o WM T 10k 20k 30k 40k 50k 60k 70k 80k 90k 100k 110k 120k Hz 130k Sla SI COLA 7B SST Series Amplifier Typical Freguency Response 7BSST o a 0 3 0 4 0 5 0 6 0 7 0 8 0 9 o o io TTTTJTTTT TTTT TTTTITTTTYTTTT TTTTTTTTT TTTTT TTTTHTTTTTTTTT TTTT TTTT TTTT m S 50 100 200 500 1k 2k 5k 10k 20k 50k Typical Phase Response 7 o 6 4 ohm 900w 5 4 3 2 8 ohm 600w o n S a o 100 200 500 1k 2k 5k 10k 20k 10 LG CL COL 7B SST Series Amplifier Typical THD N Sweep 0 01 0 009 0 008 0 007 0 006 0 005 0 004 0 003 Graph shows that distortion is essentially unaffected by load 2v balanced input shown 0 002 0 001
13. remote control voltage 4v to 12v ac or dc Warranty see back page for details Shipping Box amp Packing Material Please keep the original shipping box and all packing material This will ensure the amplifier is protected in future trans port 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 7B SST amplifier is convection cooled Unrestricted air flow across the 7B SST heat sinks is a must For this reason do not install anything directly above it Allow 3 5 2u to 5 3u inches of space above and to the sides of this amplifier Do not install directly above other heat gener ating eguipment Should your instillation conditions be constricted then additional forced air cooling may be necessary Bryston can provide an optional fan package if reguired Thermal shut down during operation indicates insufficient air flow and a remedy must be found for cooling the amplifier Provide a minimum 6 space to the rear of the amplifier for ventila tion and dressing cables to and from the amplifier Never operate the amplifier in a vertical position Wiring the SST amplifier also see rear panel description Speaker wires should be as s
14. rovide full insertion of the banana plug Gold plated locking banana plugs are available from Bryston 2 Spade 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 3 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 reguire further tightening after the initial installation Spade lug dimensions Jod GSL COL 7B SST Series Amplifier mu NM SST Front Panel 1 SST POWER switch The front panel label SST POWER is a touch sensitive membrane switch used to apply or remove a c line power to the soft start circuitry Push firmly the center of the switch until the power up seguence begins Push again and the amplifier will power down Note the rear circuit breaker must be on for the amplifier to power up 2 LED Indicator The 7B SST has an LED indicator to monitor the following conditions UNLIT indicates the amplifier has no power RED indicates the amplifier is muted power up GREEN indicates the amplifier operation is normal FLASHING RED indicates the amplifier clipping ORANG
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