atelier 13 audio
PASS LABS PREAMPLIFIERS
SOLID STATE CLASS A LINE STAGE PREAMPLIFIERS
"Through it all, the performance has been dynamite: superlative transparency, absolutely quiet, extraordinary dynamic range, and an exceptional tonal balance throughout the musical range... with bulletproof reliability to boot."
BY NELSON PASS - MADE IN THE USA
XS Preamplifier
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.
XS PRE SPECIFICATIONS
Class - A / Dual Mono
Remote - Yes
Gain (dB) - 9.5
Inputs - 6 XLR / 1 RCA / 1 Tape
Input Impedance - 42Ko (BAL)
Outputs - 2 x RCA / 2 XLR / 1 Tape
Volume Control - 100 x 1dB Steps
Power Consumption (Watts) - 55
Number of Chassis - 2
Dimensions / in. (WxDxH) - 19 x 14 x 6.25 (x 2)
Unit Weight (LBS) - 80 total
XP-32
The XP-32 is a three-piece modular preamplifier consisting of one control/power supply chassis and two additional gain chassis each containing analog signals of a single channel.
The XP-32 generates less noise, crosstalk and distortion while delivering greater dynamic range, gain, output voltage and output current. But it is the sound, not the technical excellence, that truly makes this a breakthrough instrument.t
XP-32 SPECIFICATIONS
Class - A / Dual Mono Signal
Remote - Yes
Gain (dB) - 9.3
Inputs - 6 XLR / 1 RCA / 1 Tape
Input Impedance - 42Ko (BAL)
Outputs - 2 x RCA / 2 XLR / 1 Tape
Volume Control - 100 x 1dB Steps
Power Consumption (Watts) - 45
Number of Chassis - 3
Dimensions / in. (WxDxH) - 17 x 12 x 4 (x 3)
Unit Weight (LBS) - 57.5 total
XP-22
The new design uses double shielded low noise toroidal transformers in external supply connected via aviation grade circular connectors using silver over oxygen free copper. The power supply is dual mono with two transformers with lower radiated and
mechanical noise. Noise is the most prominent part of THD+N at low levels, so by lowering noise we get better resolution and dynamics. The gain circuitry continues to use our favorite transistors from Toshiba but has a larger, higher biased, output stage like the Xs Preamp, and includes auto bias.
XP-12
The new XP-12 starts with a new power supply. It uses an efficient toroidal design with both an electrostatic and Mu metal shield along with vacuum impregnating and epoxy fill. This gives us a very quiet transformer both electrically and mechanically. The power supply circuitry itself is also lower noise and has additional filtering, a little more complicated but worth it. The XP-12 uses the single stage volume control borrowed from the XS line preamp. This gives us one hundred 1 dB steps with lower noise and distortion while removing some signal path parts.
XP-12 SPECIFICATIONS
Class - A
Remote - Yes
Gain (dB) - 9.3
Inputs - 2 XLR / 3 RCA
Input Impedance - 22k Ohms
Outputs - 1 x RCA / 1 XLR
Volume Control - 100 x 1dB Steps
Power Consumption (Watts) - 30
Number of Chassis - 1
Dimensions / in. (WxDxH) - 17 x 12 x 4
Unit Weight (LBS) - 20
PRE / HPA -1
The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding
headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.
HPA-1 SPECIFICATIONS
Pre Circuit - Class A
HPA Output Z - 15 > 600 ohms
Gain (dB) - 8
Inputs - 2 x RCA
Input Impedance - 50k Ohms
HPA Power @ 20 ohms - 3.5W
HPA Power @ 300 ohms - 200mW
Frequency Response - 10Hz-100kHz -1dB
THD + NOISE - < 0.005 at 1V out
Outputs - 1 x RCA / Output Z - < 2 ohms
Volume Control - Rotary / Alps
Power Consumption (Watts) - 23
Number of Chassis - 1
Dimensions / in. (WxDxH) - 11 x 13.5 x 4
Unit Weight (LBS) - 14
