Introduction - DYNACO PAS-4 Owner's Manual

Introduction

Congratulations on your purchase of the Dynaco PAS-4 preamp. This preamplifier
was designed to provide the highest combination of quality and value available,
which is the Dynaco tradition.
Only very high quality components have been used in manufacturing the PAS-4.
Examples of this are the low noise metal-film resistors, polypropylene film
capacitors, and selected (tested) vacuum tubes. Likewise, the high quality rotary
switches and potentiometers provide better performance and reliability than what is
found in most other audio equipment.
Unique to this modern PAS-4 vacuum tube design is its power supply buffering
circuitry - found in no other preamp of this class. We have included a separate
buffer circuit for each of its six tubes, allowing each amplification stage to function
more independently, (as if each has its own separate power supply). This
contributes significantly to the extraordinary sonic clarity of the PAS-4.
The PAS-4 contains a true state-of-the-art phono preamp section. It provides a
front panel switched "external processing loop" for use with a graphic equalizer or
other signal processing equipment. It also includes full provisions for tape dubbing
between two tape decks ("1 to 2" and "2 to 1").
You will find the PAS-4 to sound better than the large majority of other
preamplifiers - both solid state and vacuum tube designs - regardless of price. Its
flexibility and full-featured styling is without parallel in affordable preamps. Your
PAS-4 was designed and built entirely in the USA. We are proud to offer this
outstanding preamplifier to discerning audiophiles the world over.
Dynaco Engineering Group
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