Owners Manual
Contents
1. the signal electronics ground is separated from the chassis mains ground 2 V 1 0 Page 5 Owners Manual SR3000 Split Rail Amplifier SANDS 4 OUTPUTS Three Neutrik Speakons wired as follows Ch A l 1 Ch B 1 1 BRIDGED MONO 14 2 For Bi amplified 2 way use with Low Signal connected to channel A and High Signal connected to channel B the Loudspeaker should be connected to the BRIDGED MONO socket and wired as follows Ch A Low Signal Pins 1 and 1 Ch B High Signal Pins 2 and 2 5 TEMPERATURE TRACKING FILTERED FANS Forced air ventilation is provided by two 2 rear panel mounted fans Air movement is rear to front Care should be taken to ensure air intakes and outlets are not obstructed The fan filters MUST be regularly inspected and cleaned if necessary The cleaned filter elements may be easily removed and cleaned by rinsing in clean water and drying before re installation Clogged filters may cause the amplifier to overheat and disconnect the speaker outputs The 80mm DC fans are linearly speed controlled by the heatsink temperature giving low noise operation with high cooling capacity when required The i fans idle at 20 for heatsink temperatures less than 25degC 77 deg F increasing ap linearly to full speed at 60degC 140 deg F 6 POWER CONNECTION amp CIRCUIT BREAKER Fixed 3 core cable as standard The 8 amp circuit breaker trips only during prolonged over2. Idle consumption typically 100VA Maximum consumption 2000VA 4 ohm load Inrush current typically 3amps internal limit V 1 0 Page 7 SPECIFICATIONS Continued PROTECTION Mains circuit breaker 8 amps Internal fuses 10A M205 fast HRC x 8 not user serviceable Four second delay for speaker relays Over temperature speaker cutout at 100deg C 212deg F on each heatsink DC speaker cutout at 25v LF speaker cutout at 10Hz 100v 5Hz 50v Short circuit protection acts on loads less than 2 ohms resistive unlimited duration until thermal cutout Nominal dead short limit 15 amps Allows opamp peaks into normal loads NOTES ON SPECIFICATIONS All measurements are made at a mains supply voltage of 240 Pa 1 Most measured parameters will be unaffected by supply variations between 210 and 265 volts The output power however is linked to the mains supply voltage and will vary by roughly 2 for each 1 of supply variation OUTPUT POWER RMS Watts Sinewave j Sinewave j Sinewave IEC Tone _ IEC Tone i TEC Tone Load both channels one channel bridged both channels one channel bridged i Ohms driven driven driven driven mode 420 420 490 510 510 560 630 630 840 920 920 1010 810 810 119 1400 1400 1720 825 825 850 o 840 840 880 Limited by output protection circuits V 1 0 Page 8 Bracket reversible for different rack depths SR
3. 3000 REAR RACK MOUNTING JANDS Jands Electronics Pty Ltd 578 Princes Highway ST PETERS NSW 2044 Australia Tel 02 516 3622 Fax 02 517 1045 International Tel 612 516 3622 Australian Company Number 002 964591 Specifications herein subject to change at any time without notice Wate
4. T T i Q c 3 4 aa 6 L 2 lt x Q 62 JANDS Owners Manual SR3000 Split Rail Amplifier INTRODUCTION Thank you for purchasing a Jands SR 3000 Audio Power Amplifier The SR 3000 has been designed and built in Australia for the Audio Professional and is built to the highest specifications Unlike most other power amplifiers the Jands SR 3000 Split Rail Power Amplifer has been specifically designed to offer extremely high music power ratings IMPORTANT INFORMATION Please take time to read this page before using your new Jands SR 3000 Split Rail amplifier WARRANTY AND UNPACKING Do not remove the amplifier covers There are dangerous voltages inside There are no user serviceable parts Removing covers may void your warranty Ensure that your SR 3000 is rated for use on the mains supply voltage of your country Different models of the SR 3000 are available for use with differing supply voltages Never disconnect or defeat the amplifier earthing Connect it only to a correctly wired AC Mains outlet There may be in excess of 270V Peak AC at the output terminals with high current availability Treat the output wiring as a shock hazard Keep mains supply leads and output leads in good physical and electrical condition Make all connections with power OFF is In the event of an accident or impact severe enough to cause visible extern
5. al z damage the amplifier should e checked internally by a qualified service agent to ensure your safety WARNING To reduce the risk of fire or electric shock do not expose this amplifier to rain or moisture CJ Give the amplifier ample breathing space at the front and rear The air filters must be removed and cleaned regularly to provide optimum cooling Wash the filter foam under running water and squeeze dry before replacing To keep the amplifier clean moisten a soft cloth with a mild soap and water solution E Do not apply fluids directly to amplifier This JANDS Product is guaranteed against defects in material and workmanship for a period of two years JANDS will replace defective parts and make necessary repairs under this warranty if our examination reveals evidence of faulty workmanship or material The warranty does not cover Products subjected to abnormal strain neglect abuse modification or accidental damage Products from which the name or serial number have been defaced or removed The result of normal wear A warranty card is included with your amplifier which should be returned to JANDS ELECTRONICS or the distributor in your country This warranty does not affect the purchaser s ri ghts to product warranty as determined by State or Commonwealth law V 1 0 Page 2 FEATURES UNIQUE POWER OUTPUT STAGES permit massive transient output energy with high conversion efficiency The SR 3000 operates
6. as a conventional high quality bipolar amplifier at normal output levels then engages a supplementary high voltage stage to allow peak outputs in excess of TWICE the amplifier s normal power ULTRA SOFT TURN ON Mains inrush is minimised to prevent nuisance tripping of venue breakers OUTPUT MUTING High current output relays are engaged four seconds after turn on allowing power up surges from other equipment to settle before the speakers are connected FULL SHORT CIRCUIT PROTECTION The output stages are electronically protected against shorts without blowing fuses Protection i and recovery are instant 1 DC AND LOW FREQUENCY PROTECTION The speakers are ER disconnected if damaging quantities of DC or inaudible subsonics are ki detected In this situation the DC LED will iluminate and the ACTIVE LED will turn off OVER TEMPERATURE SHUTDOWN The speakers are disconnected if the SR3000 overheats and are reconnected when it cools sufficiently In this situation the TEMP LED will illuminate and the ACTIVE LED will turn off SOUND QUALITY Every aspect of the SR 3000 has been designed for optimum sound quality Input signals are buffered by NE5532 op amps The power amplifier uses discrete devices in a fully symmetric complementary design High current wiring is totally segregated from small signal wiring POWER SUPPLY The toroidal transformer has been optimised for high regulation audio use The unique Split Rail power
7. loads and is easily reset 7 RACK MOUNTING The rack mounting brackets allow direct mounting into Universal 19 482 mm racks H is vital that mobile touring amplifiers are four point mounted in racks Rear mounting brackets are available to suit various racks V 1 0 Page 6 Owners Manual SR3000 Split Rail Amplifier JANDS SPECIFICATIONS FREQUENCY RESPONSE 0 1dB 10Hz 20kHz 4 ohm load SLEW RATE 30 V usec 4 ohm load PHASE SHIFT typical 10deg 20kHz DISTORTION Less than 0 25 20Hz 20kHz at any level Typically 0 01 20Hz 1kHz 3dB below clip SIGNAL TO NOISE RATIO Better than 100dB re 800 watts 4 ohms OUTPUT NOISE Better than 63dBu 20Hz 20kHz Better than 70dBu A weighted DC OFFSET Less than 50mV at the output CROSSTALK Better than 80dB 20Hz 1kHz better than 70dB 10kHz with driven channel 1dB below clip both channels with a 4 ohm load and the measured channel at full gain with un terminated input DAMPING FACTOR 300 below 1kHz re 8 ohms 125 10kHz re 8 ohms AMPLIFIER GAIN x40 32dB PHYSICAL SIZE 2 unit rack mount chassis with front and rear mounting points 482mm wide 88mm high 440mm deep between front amp rear rack mounting points Weight 20kg POWER 240 Volt version Circuit breaker 8 amps Supply voltage 240v nominal 50Hz AC Voltage range 200 260 volts output power to vary accordingly
8. ng Far linearly to full speed at 60degC 140 deg F 6 POWER CONNECTION amp CIRCUIT BREAKER Fixed 3 core cable as standard The 8 amp circuit breaker trips only during prolonged overloads and is easily reset a RE 7 RACK MOUNTING The rack mounting brackets allow direct mounting into Universal 19 482 mm racks It is vital that mobile touring amplifiers are four point mounted in racks Rear mounting brackets are available to suit various racks V 1 0 Page 6 Owners Manual SR3000 Split Rail Amplifier JANDS REAR PANEL FEATURES 1 ACTIVE BALANCED INPUTS Reduce potential system hum noise and instability 3 pin female XLR connectors wired Pin 1 Electronics Ground Pin2 Hot Pin3 Cold Input sensitivity 4dBu Nominal 7dBu 1600W input impedance 20 k ohms 2a BRIDGE MODE SWITCH Inverts the channel A input signal and feeds it to channel B Ch A level control active Converts the amplifier into a high power bridge mode monoblock over 2800 watts IEC tone burst power into 8 ohms 2b NORMAL MODE SWITCH Both channels operate independently of each other Input attenuators control individual channels 2c PARALLEL MODE SWITCH Feeds channel A input to both channel input attenuators In this mode Channel B input is not connected 3 GROUND EARTH LIFT SWITCH This switch should normally be set to GROUNDED In the GROUND LIFT position
9. output stage provides massive peak power reserves Nine separate power supply rails and careful attention to layout geometry ensure excellent performance at low and high output levels and at all frequencies COMPACT POWER is designed to offer more power to weight and more power per rack height than any other amplifier ROADWORTHY The monocoque chassis has been designed for four point mounting in touring racks The front panel controls are deeply recessed to eliminate damage Service access although unlikely to be required is excellent V 1 0 Page 3 JANDS Owners Manual SR3000 Split Rail Amplifier FRONT PANEL FEATURES 1 POWER SWITCH This isolates the amplifier from the incoming mains supply 2 INPUT ATTENUATORS These are variable between OdB and lt attenuation The SR 3000 has an input sensitivity of 4dBu nominal with the attenuation control set at 0 dB 3 TRUE HEADROOM BARGRAPH METERS The four segment LED bargraphs provide a true indication of headroom by continuously measuring the output level against the amplifiers maximum output ability The top CLIP LED is a sensitive input output disparity indicator which shows distortion due to clipping or output short circuits The Channel B CLIP LED illuminates with signal when the SR3000 is in bridge mode 4 POWER LED Iiluminates to indicate that there is mains power available and that the power switch is on 5 ACTIVE LED Illuminates to indicate tha
10. t the Output Relays are on 6 TEMP LED Illuminates to indicate that the Amplifier has overheated and so disconnected the speaker outputs 7 DC LED Illuminates to indicate that there is DC or excess very low frequency present and speaker outputs have been disconnected V 1 0 Page 4 N Owners Manual SR3000 Split Rail Amplifier JANDS 4 OUTPUTS Three Neutrik Speakons wired as follows Ch A 1 I Ch B 1 1 BRIDGED MONO 14 2 For Bi amplified 2 way use with Low Signal connected to channel A and High Signal connected to channel B the Loudspeaker should be connected to the BRIDGED MONO socket and wired as follows Ch A Low Signal Pins 1 and 1 Ch B High Signal Pins 2 and 2 5 TEMPERATURE TRACKING FILTERED FANS Forced air ventilation is provided by two 2 rear panel mounted fans Air movement is rear to front Care should be taken to ensure air intakes and outlets are not obstructed The fan filters MUST be regularly inspected and cleaned if necessary The cleaned filter elements may be easily removed and cleaned by rinsing in clean water and drying before re installation Clogged filters may cause the amplifier to overheat and disconnect the speaker outputs The 80mm DC fans are linearly speed controlled by the heatsink temperature giving low noise operation with high cooling capacity when required The i fans idle at 2096 for heatsink temperatures less than 25degC 77 deg F increasi
Download Pdf Manuals
Related Search