Pass Labs SR2 User Manual

PASS

SR2 Owners Manual Rev 0.2

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The “SR-2” (second Son Of Rushmore) loudspeaker is Pass
Laboratories third entry into the often-confusing world of
loudspeakers, a world fraught with claims of new technology and
brilliant technological breakthroughs. Pass Laboratories claims no
inclusion of special technology in the SR-2, only Nelson Pass’s
meticulous attention to detail, a strong commitment to using the
finest available parts and the love of experiencing the finest in
recorded music in your own environment.

The first Pass Labs loudspeaker was “Rushmore” a no compromise
system built around what we sincerely believed were the finest,
high efficiency drivers available anywhere in the world. Those
drivers were mated to four purpose built class A amplifiers,
electronic crossovers and level controls into a self contained, all
encompassing package.

Rushmore was an uncompromising product that relied on us, the
maker, having complete control over all aspects of the listening
chain with the exception of the source and material.

The Rushmore aimed for high dynamic contrast and control with
very low distortion. This was achieved with the finest quality
“strong motor” drivers intimately coupled to single-ended Class A
amplifiers. The result was a stunning display of clarity and
dynamics.

Realizing that many customers already have favorite electronics or
appreciate the opportunity to choose and substitute electronics and
cables as their preferences change. Pass Laboratories set out to
design a new family of passive speakers that would accommodate
a wide variety of customer owned electronics with as little

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compromise of the Rushmore’s acoustic characteristics as
possible.

Like Rushmore and the SR-1 the Pass Laboratories SR-2 started
with premiere examples of the loudspeaker driver makers art; the
highly regarded Nextel series of drivers from Seas of Norway. Each
SR-2 loudspeaker system contains one each of the following SEAS
loudspeaker elements;

29 mm soft dome “HEXADYM” tm magnet tweeter
18 cm midrange driver
26 cm long excursion woofer

All of these Seas drivers have very long excursion diaphragms of
carefully engineered paper and textile, low mass, under-hung voice
coils and substantial copper faraday rings in the motor assembly.
These advanced and costly design features in the Nextel drivers
assure very low, non-linear distortion and excellent transient
response.

The crossover elements are carefully selected premium domestic
units, chosen both for their sonic characteristics and technical
merit.

Each loudspeaker element and crossover in this single piece 3 way
system is hand wired, inspected and tested in the Foresthill
California factory of Pass Laboratories, assuring our meticulous
personal attention to quality control.

We at Pass Laboratories want you the listener to enjoy this hobby
in all its aspects. If you want to do nothing but listen to the music

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