100W 8R 200W 4R PWM MONOBLOKS WITH STATE OF THE ART MOD Start Price GBP 1,500.00 Current Price GBP 1,500.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Sunday, November 16, 2008 End Time Tuesday, December 16, 2008 Location north east of england See more about '100W 8R 200W 4R PWM MONOBLOKS WITH STATE OF THE ART MOD' Description PAIR OF PWM MONO BLOCK POWER AMPLIFIERS 200W WITH 4 OHM LOAD 100W WITH 8 OHM LOAD THE CHASSIS AND ALL FIXINGS AND FITTINGS ARE NON MAGNETIC INPUT RCA CONNECTOR IS SOLID SILVER, SPEAKER CONNECTORS ARE CARDAS SOLID UN-PLATED COPPER, ESSENTIALLY THE FINEST CONNECTORS AVAILABLE. THE STANDARD INDUSTRIAL CONNECTORS ON THE AMPLIFIER BOARD ARE REMOVED OR BY-PASSED AS IT WOULD BE POINTLESS USING STATE OF THE ART CONNECTORS WITH NASTY INDUSTRIAL CONNECTORS INTERNAL WIRING IS MY FAVOURITE HIGH PURITY 99.9999% ZERO CRYSTAL COPPER WHICH DOES NOT HAVE A CRYSTAL LATTICE IT IS KNOWN THAT AT THE CRYSTAL BOUNDARIES OF CRYSTALINE COPPER IMPURITIES COLLECT AND THE INDIVIDUAL CRYSTAL JUNCTIONS BEHAVE LIKE DIODES, NOT GOOD! THE SIGNAL AND MAINS WIRING ARE SOLDERED DIRECTLY TO THE BOARD MAINS CABLE IS MY OWN, DESIGNED TO FILTER MAINS NASTIES THE CHASSIS FEET ARE MADE OF THE SAME MATERIAL THAT AUDIO RESEARCH NOW EMPLOY FOR THEIR CHASSIS AND ARE THE BEST I'VE TRIED SO FAR THE AMPLIFIER CIRCUIT BOARD CAN BE USED WITH A BALANCED OR SINGLE ENDED INPUT, THESE AMPS ARE FITTED WITH RCA (SINGLE ENDED) INPUTS BUT I CAN PROVIDE AMPS WITH A NEUTRIK XLR FOR BALANCED OPERATION OR BOTH IF REQUIRED, A NEUTRIK XLR SHORTING PLUG WILL BE INCLUDED FOR USE WHEN THE RCA INPUT IS BEING USED (£20 EXTRA FOR BOTH XLR AND RCA) ALSO I FITTED A VIOLET LED (IT LOOKS BLUE IN THE PICTURE BUT IT IS VIOLET IN REAL LIFE! THE AMPS ALSO LOOK 'DUSTY' BUT THEY ARE NOT MUST BE A LIGHTING/CAMERA ARTEFACT) POWER INDICATOR BUT ANY OTHER COLOUR IS AVAILABLE THE CHASSIS COLOUR CAN ALSO BE CHOSEN MAINS VOLTAGE INPUT RANGE IS 100V TO 240V WHILE THE AMP BOARDS DO HAVE AN AUTO TURN ON FEATURE THIS IS NOT USED AS THESE MODIFIED BOARDS NEED TO BE POWERED AT ALL TIMES TO OBTAIN THE MAXIMUM PERFORMANCE POSSIBLE I HAVE IMPROVED THE PERFORMANCE OF THESE AMPLIFIER BOARDS BY A LARGE MARGIN, THEY ARE NOW MORE THAN A MATCH FOR EVEN THE FINEST AMPLIFIERS AVAILABLE. I PURCHASED THESE AMPLIFIERS TO USE IN MY ACTIVE SYSTEM FOR BASS DUTY AS I HAD HEARD THEY WERE VERY SPECIAL IN THE BASS. WHILE AUDITIONING IT WAS CLEAR THAT THE HIGHER RANGES SHOWED A LOT OF POTENTIAL (BUT CLEARLY FLAWED), THE SAME KIND OF POTENTIAL THAT THE ARCAM ALPHA 5 CD PLAYER DISPLAYED, SEVERAL PEOPLE WHO PURCHASED MY MODIFIED ALPHA 5 STATED THAT IT OUTPERFORMED DACS AND CD PLAYERS IN THE £4000 REGION. THIS IS PRETTY MUCH WHAT I DEMAND FROM ANY MODS I CARRY OUT, I'M NOT INTERESTED IN SLIGHT IMPROVEMENTS BUT TO BE FAIR I ONLY MODIFY COMPONENTS I FEEL HAVE THE POTENTIAL FOR TRULY GREAT PERFORMANCE, SUCH EQUIPMENT IS QUITE A RARITY. I ALSO PURCHASED SOME 500W 8 OHM 1000W 4 OHM AMPLIFIER BOARDS AS I DID THINK THAT MY ACTIVELY EQUALISED BASS DRIVE UNITS WOULD REQUIRE MORE POWER THAN THESE 100W 8 OHM BOARDS. HOWEVER THE EXTRA POWER WAS NOT REQUIRED WHICH IS JUST AS WELL BECAUSE I COULD NOT EMPLOY THE SAME MODIFICATIONS WITH THE 500W 8 OHM BOARDS AND WHATEVER MODIFICATIONS I DID CARRY OUT THEY WERE NOT ABLE TO REACH THE SAME HIGH PERFORMANCE AS THE 100W BOARDS THESE ARE B&O ICE POWER AMPLIFIERS EMPLOYED BY A NUMBER OF AUDIOPHILE MANUFACTURERS SADLY THEY USE THE BOARDS AS THEY ARE SUPPLIED COMPLETE WITH THOSE NASTY INDUSTRIAL CONNECTORS AND RATHER INADEQUATE ELECTRONIC COMPONENTS IT MAY SHOCK YOU WHEN I TELL YOU THERE ARE CHEAP AND NASTY ELECTROLYTIC CAPACITORS IN THE SIGNAL PATH ON THE STANDARD BOARDS PLUS A NUMBER OF CRITICAL COMPONENTS THAT LIMIT PERFORMANCE TO A LARGE DEGREE. STRANGE THEN THAT AUDIOPHILE MANUFACTURERS ARE HAPPY TO USE THEM AS STANDARD WHEN SOME WORK AND COMPONENTS CAN IMPROVE THEM SO MUCH. I'VE BEEN WORKING ON THESE BOARDS FOR MONTHS TRYING DIFFERENT TECHNIQUES AND COMPONENTS TO WRING THE MAXIMUM PERFORMANCE OUT OF THEM. BOTH THE AMPLIFIER CIRCUIT AND THE POWER SUPPLY HAVE BEEN MODIFIED AND THE POWER SUPPLY IS NOW ABLE TO RESPOND AS FAST AS THE AMPLIFIER CIRCUIT REQUIRES. I HAVE TO SAY THESE ARE DIFFICULT BOARDS TO WORK ON, THE COMBINATION OF MULTI LAYER PCB, SURFACE MOUNT COMPONENTS, HIGH MELTING POINT LEAD FREE SOLDER AND ABSENCE OF A CIRCUIT DIAGRAM DONT MAKE IT EASY, IT IS EASY TO DESTROY THE AMP HOWEVER, I'D ADVISE ANY ENTHUSIAST PLANNING TO WORK ON THESE BOARDS TO TAKE EXTREME CARE! THESE AMPLIFIERS HAVE THE ABILITY TO MAKE EVEN THE BEST LINEAR AND PWM AMPS SOUND DYNAMICALLY COMPRESSED. THIS PLAYS A SIGNIFICANT ROLE IN THESE AMPS ABILITY TO SOUND 'REAL' THE MODIFICATIONS REDUCE COLOURATION IMPROVE INFORMATION RETREIVAL AND PRAT (PACE RHYTHM AND TIMING) IS FIRST CLASS DUE I THINK TO THE POWER SUPPLY MOD I'M NOW USING THESE AMPS ON BOTH THE BASS (<200Hz) AND THE MID/HF (>200Hz) IN MY ACTIVE SYSTEM, NOT WHAT I EXPECTED BUT I DO PREFER THEM TO ANY OTHER AMPLIFIER I'VE OWNED OR AUDITIONED I KNOW THIS WILL BE ONE ITEM THAT WHEN I'VE SOLD THE FEW I HAVE PEOPLE ARE GOING TO BE ASKING IF I CAN SUPPLY MORE, THE ANSWER WILL BE NO BE CERTAIN TO CHECK OUT MY OTHER AUDIO GOODIES ON E-BAY NOW Place a Bid!