XVR-1 - Pass Labs

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SIMPLIFIED SCHEMATIC – ONE CHANNEL32
The basic circuitry is a very simple discrete single-ended Class A stage designed tooperated at low gain and feedback levels with high performance and stability. In thediagram above you see the matched JFET input devices. These drive a PNP bipolar gaintransistor which is also a level-shifter. Both gain stages are driver by NPN bipolar currentsources which are in turn regulated by an NPN bipolar voltage reference taking feedbackfrom the first current source.The distortion and noise imposed on a signal running through this circuit is typically .03% at30 volts balanced output from 10 Hz to 20 KHz, and .002% at 3 volts output. The bandwidthis flat from DC to way beyond 100 KHz.33
Page 1 and 2: PASS LABORATORIES XVR1 ELECTRONIC C
Page 3 and 4: Cautions:Remove the AC power cord f
Page 5 and 6: INSTALLATION AND SETUPYou can put t
Page 7 and 8: Remove the AC power cord from the X
Page 9 and 10: 12 DB/OCT ( 2 POLE ) @ 1060 Hz9
Page 17 and 18: SOME REAL BASIC THEORYHow we look a
Page 19 and 20: Tri-Amping19
Page 23 and 24: Quint-amping23
Page 25 and 26: Real Project: #1We took a Pioneer T
Page 27 and 28: Real Project #2This is a much more
Page 29 and 30: Now it is time to develop a crossov
Page 31: SOME PRODUCT SPECSTests conducted w
Page 35 and 36: LOW PASS FAMILY - 6 DB/OCTLOW PASS

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