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X250.5 Owners Manual

pass

TM

X250.5 Owner’s Manual

May 17, 2006

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Summary of Contents for X250.5

Page 1: ...1 X250 5 Owners Manual pass TM X250 5 Owner s Manual May 17 2006 ...

Page 2: ... Supersymmetry enhances this effect by provid ing a connection between the two halves of the balanced circuit that further perfects the match of common mode artifacts Any distor tion and noise not already identical to the two halves is made more identical by a factor of about 10 The result of this perfected match is improved noise cancellation at the output of the amplifier From a listeners standp...

Page 3: ...ings of the 21st Century and the elegance to retrieve the micro dynamics offered by the most sensitive loudspeakers The simple but powerful circuitry moves easily from total silence to explosive transient and back to silence without a trace and without information loss Very unlike conventional high power amplifiers they provide this level of power with a subtlety befitting some of the better tube ...

Page 4: ...erify that the amplifiers indicated voltage requirements are consistent with the line voltage supplied at your location The Pass Laboratories X250 5 is provided with a conventional IEC detachable AC line cord which is rated at 15 amps The safety ground is attached to the chassis in the conventional approved manner The AC power input to the amplifier runs through a RF filter which re moves high fre...

Page 5: ...signal ground reference and their makers may suggest that a black speaker terminal is where this volt age reference might be found On complementary designs which would be typical of all power amps produced by Pass Laboratories this is an incorrect and unsafe assumption On all Pass Laboratories power amplifiers a reference of 0 volts will be found only at pin 1 of the XLR input or at the shell of t...

Page 6: ...the heat sinks will rise approximately 25 degrees C above that for an average on heat sink temperature of 48 degrees C Sonically they are at their best when the heatsinks are approximately 50 degrees C In your setup the temperature may vary a bit due to line voltage varia tions and ventilation but this is not a big deal You should be able to put your hands on the heat sinks without discomfort for ...

Page 7: ...s but it does occasionally surface In these cases take special care that the source does not contain a differential DC component and confirm the differential DC offset of the pre ampli fier is sufficiently low This differential voltage is easily adjusted by a qualified technician armed with the appropriate service documents We have a general recommendation about interconnects which is that they sh...

Page 8: ...r supply capacitors and from experience they will last 15 to 20 years before needing replacement Fortunately these components die gracefully typically with years of warning and are easily replaced After that the longevity will depend on the number of operating ther mal cycles but we can attest to having had amplifiers operating in the field in excess of 20 years with no particular mortality except...

Page 9: ...Output Noise 400 uV unweighted 20 20 kHz Balanced CMRR 60 dB 1 kHz input common mode rejection ratio DC offset 100 mV differential Power Consumption 350 watts idle 1000 watts max Temperature 25 degrees C above ambient at idle Dimensions 19 W x 22 D x 9 5 H Weight 110 Lbs For more information please contact Pass Laboratories Inc P O Box 219 24449 Foresthill Rd Foresthill CA 95631 Tel 530 367 3690 F...

Page 10: ... of origin for warrantee service Foreign distributors are only required to offer warranty service on Pass Laboratories product that they have imported Please note Conditions of warranty service and customer rights for product purchased outside the United States may vary depending upon the distribu tor and local laws Please check with your local distributor for specific rights and details Any modif...

Page 11: ... one that is fully safety rated by the necessary local authority Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on abraded or pinched by items placed on or against them paying particular attention to cords where they enter plugs or exit from a device Never under any circumstance insert a cut or damaged power cord into a mains power socket Power a...

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