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
