BRAND: Pass Labs

SERIES: Xs Preamp
TYPE: Preamplifier

Pass Laboratories, Inc. was founded in 1991 by Nelson Pass.  Operating out of his shop at home, Pass developed prototypes of a single-ended Class A amplifier design.  At the same time, he and Mike Burley were constructing an in-house machine shop with three home-built CNC milling machines with which to produce the amplifiers when the design was finished.

OVERVIEW

This large, dual-chassis preamplifier is built in true dual-mono arrangement. Each channel has its own power supply board with over 100,000uf of capacitance for unfettered transient response. Noise levels have been dropped from the already low-noise XP30. Refined circuit design and layout, new gain-stages with auto-bias and DC compensation all combine for optimal performance. But it all comes down to sound; once you listen to the Xs preamplifier, there is no going back.

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TECHNICAL SPECIFICATIONS

Overall Gain         
-89.5 dB to +9.5 dB

Volume Steps                       
99

Remote                                   
Yes

Inputs                                     
6

Outputs                                   
4

Frequency Response              
-3dB @ 2 Hz and 60 kHz

Input Impedance                   
42k balanced

Output Impedance                 
120 Ohm bal, 120 Ohm SE

 

 

CMRR                                       
-65 dB, 1 kHz

Cross-talk                               
-100 dB, 1kHz Ref 1V

Signal to Noise Ratio              
< -110 dB, Ref 5V

Power Consumption (W)       
55

Number of Chassis                 
2

Dimensions, Each Chassis     
19”W x 14”D x 6.25”H

Weight (LBS)                          
80

Shipping Box Dim             
24 x 19 x 23

Shipping Weight (LBS)         
90

 

OTHER PRODUCTS: PRODUCTS / PREAMPLIFIERS