BRAND: Pass Labs

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.


XP17 uses the new-shielded low noise toroid and input filter module, like the XP-12. The power supply has an extra stage of RC filtering.  We have lower radiated and mechanical noise.

The XP17 has an all-new input circuit that is symmetrical and lower in noise and distortion with greater drive capability. Noise is the most prominent part of THD+N in the first section of a phono stage. By lowering noise we get better resolution and dynamics.

Designed with a split EQ network like the XP 25 and XS Phono that is more accurate and can handle greater signal levels. The secondary stage runs a higher bias output stage with auto bias. The numerous loading options from the XP-15 are all still available and three gain settings to accommodate low output MC to MM cartridges.

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Power Consumption
35 Watts

76, 66, 56 dB Balanced; 70, 60, 50 Unbalanced

Output Impedance
110 Ohms RCA; 220 Ohms Balanced

Input Impedance
10 – 47K Ohms more than 200 values


Capacitive Loading
100 – 750 pF

RIAA Curve Accuracy
+/- .1 dB 20 – 20 KHz Passive / Active EQ

Distortion and Noise
0.004%; Quad matched low noise symmetrical JFET input;

Double shielded low noise toroid
17”w x 12.5”d x 4”h @ 19lbs