Pass Laboratories Pass Aleph 60 Owner'S Manual Download

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SPECIFICATIONS

Gain

20dB balanced, 20dB single ended

Freq. Response

- 0.5 dB @ 2 Hz, -1.5 dB @ 100 KHz

Power Output

60 watts/ch @ 8 ohms, 100 watts @ 4 ohms @ 1% THD

Maximum Output

32 volts, 8 amps

Distortion (1KHz)

0.2% @ 60 watts, 8 ohms

Input Impedance

47 Kohm single-ended, 52 Kohm differential

Damping factor

100

Crosstalk

> -80 dB

20-20 KHz

Balanced Input Rejection -50 dB typical CMRR

Output Noise

< 500 uV unweighted

Random noise floor

5 uV typical

DC offset

< 100 mv

Power Consumption

220 watts

Temperature

25 degrees C. above ambient

Dimensions

17 " W x 15.5" D x 5.5" H

Shipping Weight

45 lb.

VOLKSAMP

Pass Labs

Po Box 219

Foresthill CA 95631

tel

(530) 367 4935

fax

(530) 367 4984

www.volksamp.com

www.passlabs.com

Summary of Contents for Pass Aleph 60

Page 1: ...Volksamp Pass Aleph 60 Owner s Manual ...

Page 2: ...re are no potentiometers to adjust The operating parameters of bias currents and DC offset and so on are defined by physical constants and will not go out of adjustment Most important the Aleph 60 brings improvement to the recreation of subjective sonic reality The amplifier delivers detail and subjective space rarely found in semiconductor circuits coupled with the authority and clarity rarely fo...

Page 3: ...nsive Also it allowed very limited space for access to input and output terminals on the rear of the amplifier and required the on off power switch to sit in the rear underneath the wiring It has been said that ownership of the original Alephs was proof of the owner s dedication to sound at the cost of convenience The Aleph 60 has a new more conventional chassis with heat sinks on the side a facep...

Page 4: ... the RCA input otherwise you will not get the proper gain figure for the amplifier If you operate the amplifier with balanced inputs you will remove this jumper and we advise you to save it carefully for future use The fourth connection is the amplifier output connection Connect the 5 way output connector to loudspeaker plus and ground using the cable of your choice The amplifier draws about 240 w...

Page 5: ...ng hype we have a large number of attempts to improve the sound of amplifiers each attempting to address a hypothesized flaw in the performance Audiophiles have voted on the various designs with their pocketbooks and products go down in history as classics or are forgotten The used market speaks eloquently Marantz 9 s command a high price while Dyna 120 s are largely unwanted So far there has been...

Page 6: ... application of feedback resulting in loss of warmth space and detail High idle current or bias is very desirable as a means of maximizing linearity and gives an effect which is not only easily measured but easily demonstrated Take a Class A or other high bias amplifier and compare the sound with full bias and with bias reduced Bias adjustment is easily accomplished as virtually every amplifier ha...

Page 7: ...nt 1 0 1 2 1 4 8 6 1 0 1 2 1 4 8 6 FIG 1 CHARACTERISTIC OF AIR PRESSURE VOLUME bars M Kg 3 Fig 1 shows the single ended nature of air We can push on it and raise the pressure an arbitrary amount but we cannot pull on it We can only let it relax and fill a space as it will the pressure will never go below 0 As we push on air the increase in pressure is greater than the corresponding decrease when w...

Page 8: ...itive pressure and less positive pressure Push pull circuits give rise to odd ordered harmonics where the phase alignment reflects compression at both positive and negative peaks and crossover nonlinearity near the zero point Push pull operation in amplifiers is commonly portrayed by the analogy of a two man saw cutting down a tree Certainly if we are cutting down trees by hand we would opt for th...

Page 9: ...tive amplitude is very very slightly greater than the negative For a current gain device that would mean gain that smoothly increases with current and for a tube or field effect device a transconductance that smoothly increases with current Triodes and Mosfets share a useful characteristic their transconductance tends to increase with current Bipolar power devices have a slight gain increase until...

Page 10: ...quality of power Mosfets we have tested to date We match output devices to within 2 The input devices are matched in circuit for lowest noise and distortion The smallest of these the input devices are capable of peak currents of 5 amps The largest are capable of peaks of 25 amps each and are run in parallel pairs The power Mosfets in the Pass Aleph 60 have chip temperatures ratings to 150 degrees ...

Page 11: ... supply feeds the output transistors only with a full power ripple of about 3 volt The power draw of this system is constant regardless of the music playing through the amplifier As such it does not depend on a high quality AC outlet or special power cords since the dynamic performance does not create a variation in AC line draw If the AC line is running low the output stage will bias to a higher ...

Page 12: ...ingle ended 52 Kohm differential Damping factor 100 Crosstalk 80 dB 20 20 KHz Balanced Input Rejection 50 dB typical CMRR Output Noise 500 uV unweighted Random noise floor 5 uV typical DC offset 100 mv Power Consumption 220 watts Temperature 25 degrees C above ambient Dimensions 17 W x 15 5 D x 5 5 H Shipping Weight 45 lb VOLKSAMP Pass Labs Po Box 219 Foresthill CA 95631 tel 530 367 4935 fax 530 3...

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