Bryston 4B SST User's Manual
Contents
1. 20 50 100 200 500 1k 2k 5k 10k 20k Hz 12 3B 55 4B SST Series Amplifiers 3BSST Power Output 150 watts per channel into 8 ohms 250 watts per channel into 4 ohms Gain Select and Sensitivity 29 1 3Vin 150W 8 Ohms 1V Position 23dB 2 6Vin 150W 8 Ohms 2V Position Input Impedance 50 Kohms single ended 20 Kohms balanced Distortion IM or THD noise 0 005 20Hz to 20kHz at 150 watts into 8 0 00796 20Hz to 20kHz at 250 watts into 4 0 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 Factor Over 500 at 20 Hz ref 8 ohms Dimensions 19 version with handles L x H x D 48 3 x 13 3 x 32cm 19 x 5 25 x 12 5 mounted rack depth 28cm 11 0 17 version 43 2 x 13 3 x 28cm 17 x 5 25 x 11 Weight approx 18kg 40 Ibs Power Consumption amp Heat Load At Idle Max Heat Dissipation 127 Watts 433 Btu Hr 2 channels 0 150W 8 ohms 668 Watts Max Heat Dissipation 8 ohms 1255 Btu Hr 2 channels 250W 4 ohms 1096 Watts Max Heat Dissipation 4 ohms 2033 Btu Hr Bridged 450W 8 ohms 1053 Watts Max Heat Dissipation 8 ohms 2057 Btu Hr Technical Specifications 4BSST Power Output 300 watts per channel into 8 ohms 500 watts per channel into2. Auto switch A In Local position either the front panel SST POWER switch or an poena POWER UP external voltage controls 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 after the initial power up LOCAL OUT 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 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 control 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 wire preparation for scre
3. and 4B SST Series Amplifiers wa ama o 120 130 2 Typical Band pass Noise 3BSST Typical Band pass Noise 4BSST 120 50 50 60 60 70 Power supply artifacts are all below 95 dBu p Power supply artifacts are all below 95 dBu balanced input with 23dB 2v gain shown E balanced input with 23dB 2v gain shown 80 807 a 90 B 90 E u 1002 A 102 110 dBu relative to a reference of 0 7746 Volts 130 dBu relative to a reference of 0 7746 Volts 50 100 200 500 1k 2k 5k 20 50 100 200 500 1k 2k 5k Hz Hz Typical THD N Harmonic Content 3BSST Typical THD N Harmonic Content 4BSST p d ant L B C 0 L A L 40h AOE L iz C Fo so L 4 sor The harmonic content of the 3BSST is all even order B sor The harmonic content of the 4BSST is all even order L w E E 70E 8 E m H E MEZ E 4 390 LELLLLITI IN ILLI ITI LL 10k 20k 30k 40k 50k 60k 70k 80k 90k 100k 110k 120k 130k 10k 30k 40k 50k 60k 70k 80k 90k 100k 110k 120k 130 Larson 3B SST and 4B SST Series Amplifiers Typical Fre
4. 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 Power Control 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 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
5. package if required Any SST channels thermally shutting down during operation indicates insuffi cient air flow and a remedy must be found for cooling the amplifier Provide a minimum 6 space to the rear of the ampli fier for ventilation 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 short as practical Use quality 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 will custom build cables for your application A C power Before plugging in the power cord be sure your 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 4B SST should be sufficient 50 as not to cause the circuit breaker to trip 15 amp min Note the SST when operated with both channels delivering maximum power into 4 ohm loads will consume all the available power in a normal household circuit therefore a dedi cated 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 SST amplifier performance in fact most of the time they restrict the flow of current to the amplifier reducing performance a
6. 4 ohms Gain Select and Sensitivity 29dB 1 8Vin 300W 8 Ohms 1V Position 23dB 3 6Vin 300W 8 Ohms 2V Position Input Impedance 50 Kohms single ended 20 Kohms balanced Distortion IM or THD noise 0 00596 20Hz to 20kHz at 300 watts into 8 0 0 00796 20Hz to 20kHz at 500 watts into 4 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 1 Hz to over 100 kHz Damping Factor 500 at 20 Hz ref 8 ohms Dimensions Lx Hx D 19 version with handles 48 3 x 13 3 x 43 8cm 19 x 5 25 x 17 25 mounted rack depth 40 1cm 15 75 17 version 43 2 x 13 3 x 40 1cm 17 x 5 25 x 15 75 Weight approx 22kg 50 Ibs Power Consumption amp Heat Load At Idle Max Heat Dissipation 170 Watts 580 Btu Hr 2 channels 0 300W 8 ohms 1280 Watts Max Heat Dissipation 8 ohms 2320 Btu Hr 2 channels 500W 4 ohms 2100 Watts Max Heat Dissipation 4 ohms 3750 Btu Hr Bridged 900W 8 ohms 2040 Watts Max Heat Dissipation 8 ohms 3890 Btu Hr 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 labou
7. BRYSION OWNER 5 MANUAL Instructions For Bryston SST Series Amplifiers Models 3B SST and 4B SST 800 SST 4 SST Series Amplifiers Table of Contents General Introduction Description Instalation 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 Indicators Power up Sequence LED Indicators Operating Conditions Power Control Panel Master Curcuit Breaker AC Power Input Local Auto Switch Local External Switch Block Diagrams Typical Performance Graphs Technical Specifications Important Warranty Information Page 1 Page 2 Page 3 Page 4 Page 5 Page 8 Page 9 12 Page 13 Back Cover Introduction Thank you for choosing an SST SERIES Stereo 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 3B SST The 3B SST is a dual mono design 2 x 150W per channel audio power amplifier Each channel selects a balanced or sin gle ended input Each channel selects a gain of 29dB 1v or 23dB 2v The 3B SST includes soft start power control cir cuitry to eliminate high inrush currents when A C power is applied The power up or turn on of the 3B S
8. E Graph shows that distortion is E essentially unaffected by load E essentially unaffected by load 0 005 2v balanced input shown 0 005F 2v balanced input shown 0 004E 0 004 E o 003E E E 4 ohm 500w 0 002F 0 002 0 001 E 0 001 E E 8 ohm 150w E 8 ohm 3000w 50 100 200 500 1k 2k 5k 10k 20k 50 100 200 500 1k 2k 5k 10k 20k Hz Hz Typical IMD Sweep 3BSST Typical IMD Sweep 4BSST 0 01 0 01 0 009 0 009 0 008 0 008 0 007 0 007 0 006 0 006 0 005 0 005 0 004 4 ohm 250w 0 0047 0 008 0 003 E 4 500 8 ohm 150w E 0 0025 0 0022 0 0012 8 ohm 300w p 3k 4k 5k 6k 8 9k 10 20 p 3k 4k 5k 6k 7k 8k 9k 10k 20k Hz Hz 11 Damping Factor 3BSST AND 4BSST 9 Ed Si TFTETTTTTTETTTTTTTTT 80 o 701 o 60 an 40 30 o 20 10 o mne 50 100 200 500 1k 2k 5k 10k 20k Typical Crosstalk 3BSST AND 4BSST 5 o 3 A a Channel 2 reading with 4 3 channels 1 driven to r3 rated output into 8 ohms I Channel 2 reading with channels 1 driven to N o w m aan r a r i T rated output into 4 ohms
9. ST may be acti vated by remote control voltage Description 4B SST The 4B SST is a dual mono design 2 x 300W per channel audio power amplifier Each channel selects a balanced or sin gle ended input Each channel selects a gain of 29dB 1v or 23dB 2v The 4B SST includes soft start power control cir cuitry to eliminate high inrush currents when A C power is applied The power up or turn on of the 4B SST may be acti vated by remote control voltage 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 All SST amplifiers are convection cooled Unrestricted air flow across its 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 generating equip ment Should your instillation conditions be constricted then additional forced air cooling may be necessary Bryston can provide an optional fan
10. mer 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 the 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 Mode Switch individual or bridge mode The individual setting is for two channel operation Bridge mode is for mono operation 6 Level Control pro models only The level control will attenuate the input signal level from OdB through 14dB 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 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 ter
11. minated 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 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 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 require further tightening after the initial installation Spade lug dimensions 17687200 SST 4B SST Series Amplifiers Front Panel 1 SST POWER switch The front panel label SST POWER is a touch sensitive membrane switch used to apply or remove line power to the soft start circuitry Push firmly the center of the switch until the power up sequence begins Push again and the amplifier will power down Note the rear circuit breaker must be on for the amplifier to powe
12. quency Response 3BSST Typical Frequency Response 4BSST 0 5 05 04 04 0 3 03 02 02 015 0 15 E 8 ohm 150w E 8 ohm 300w 05 0 012 01 5 92 5 02 4 250 r E 4 ohm 500w 0 3 0 3 A 042 0 4 0 54 0 5 0 6 0 6 072 07 0 85 0 8 0 9 0 9 al 1 20 50 100 200 500 1k 2k 5k 10k 20k 50k 20 50 100 200 500 1k 2k 5k 10k 20k 50k Hz Hz Typical Phase Response 3BSST Typical Phase Response 4BSST 5 15 14 14 13 13 12 12 1 E E 10 E 10 8 E 8 d E d E e 7E e 72 9 9 E 6 6 5 52 E 4 ohm 400w 4 ohm 400w a 20 A 8 ohm 250w ids 8 ohm 250w 02 0 4 20 50 100 200 500 1k 2k 5k 10k 20k 20 50 100 200 500 1k 2k 5k 10k 20 Hz Hz 10 SST 4B SST Series Amplifiers Typical THD N Sweep 3BSST Typical THD N Sweep 4BSST 0 01 E 0 01 E 0 009 E 0 009 E 0 008 E 0 008 E 0006 E 4 0 006 E E Graph shows that distortion is
13. r and return shipping to the first owner and all subsequent 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 Bryston 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
14. r up 2 LED Indicators Each SST channel has a LED indicator to monitor the following conditions UNLIT indicates channel has no power RED indicates channel is muted power up 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 SST channel LED when unlit indicates no A C mains power is present at the channel If both channel LED indicators are unlit the amplifier probably needs only to be powered on 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 an SST 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 amplifi er that is constantly operated into clipping indicates a more powerful amplifier is needed for that application Thermal Shutdown orange Each channel has thermal shutdown circuitry to prevent damage
15. t higher output levels Rear Panel Input Output Connections 1 4 PHONE PLUG CH2 m 1 sx INPUT INDIVIDUAL INPUT 1 5 SINGLE ENDED EHIDSED SINGLE ENDED INPUT INPUT O XLR TYPE RCA PLUG Fig 1 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 connector accepts standard XLR or 1 4 TRS Use quality 100 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 transfor
16. w terminals Control Voltage source 4 to 12v ac or dc fig W q opami 1 B 18 to 22 n gage 7 wire 14 strip to other voltage controlled devices Bryston part number CO 110A 11104 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 ORUST 3B SST and 4B SST Series Amplifiers CHANNEL MUTE 33Vde SENSITIVTY M AND GAIN 85Vde 4BSST CHANNEL 1 SWITCH 65Vde 3BSST SINGLE ENDED INPUT DEDICATED HIGH REGULATED INPUT PONER CURRENT POWER PLOY SELECT Av OUTPUT SUPPLY XLR OR SWITCH i SUPPLY PHONE INPUT 33Vde TEMPERATURE MONITOR CLIPING AND LED gt concur MONITOR SOFT START AC INPUT P AND LOGIC CONTROL CHANNEL MUTE 33Vde SENSITIVTY s AND GAIN 2 CHANNEL 2 SWITCH 65Vde 3BSS SINGLE ENDED i INPUT DEDICATED HIGH RENE INPUT POWER P CURR POWE al E RRENT POWER SU SELECT E OUTPUT SUPPLY VOLTAGE XLR OR SWITCH SUPPLY PHONE NPUT 33Vde TEMPERATURE MONITOR CLIPING REMOTI AND TRIGGER gt corcur diss ON MONITOR Larson 3B SST
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