PassLabs X.5 Brochure

Pass Labs

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X1000.5

X600.5

X350.5

X250.5

X150.5

X.5 amplifiers

he Pass Labs X series amplifiers

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continue to reign as the biggest, most
powerful and popular amplifiers that we
have created. They were initially designed
as proof-of-concept of the SuperSymmetric
amplifier topology, achieving phenomenal
power and precision with only two gain
stages and very little feedback. Seven years
ago we began shipping the 1000 watt
model X1000, followed by the progressively
smaller X600, X350, X250, and X150.

Patented 10 years ago by Nelson Pass,
this new topology takes advantage of highly

matched components in a completely
symmetric circuit that intrinsically
nulls most distortion and noise across
the speaker, and then applies a small
amount of feedback to perfect this
symmetric behavior. The X series
amplifiers have received critical
acclaim throughout the world for their
sonic performance, sleek industrial
design, high reliability and rugged
construction.

Pass Labs is now very pleased to
introduce the next generation of
X series amplifiers: the Pass X.5

series. Select refinements from the
balanced single-ended Class A circuits
of the XA series amplifiers have been
incorporated into several new X.5
series models, significantly improving
their subjective performance while
keeping the high power and reliability.

Changes to these models include
improvements to power transformers,
paralleled high speed / soft recovery
rectifiers, improved AC EMI filters,
more paralleled power supply
capacitors, increased supply RC
filtering, refinements to the front-

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Mono block design

1000 watts

Gain: 30dB

+/- 145V Max

+/- 30A Max

19W x 11.5H x 28D

200LBS

Mono block design

600 watts

Gain: 30dB

+/- 105V Max

+/- 25A Max

19W x 11.5H x 22D

150LBS

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