Dynaco / Dyna-Kit PAS 3X Tube Preamplifier
Designed by Ed Laurent and introduced by Dynaco in 1966, the PAS series of stereo amplifiers are renowned by audio enthusiasts the world over.
As with many Dyanco products, the preamplifier was sold under the Dyna-Kit name for $69.95 as a build it yourself kit. There was also an option to buy it fully assembled for $89.95.
Check the back panel of your PAS preamplifier - if the speaker binding posts and RCA jacks are attached with screws, then it was originally built as a kit. If there are rivets, you have a factory wired unit.
During the PAS production years, Dynaco sold over 100,000 PAS-2, PAS-3 and PAS-3X preamplifiers.
The difference between the PAS-2 and PAS-3 preamplifier is the PAS-2 has a flat brass faceplate with plastic knobs, and the PAS-3 has a silver anodized faceplate with metal knobs, otherwise both preamps are the same.
The PAS-3X preamp has a revised tone control circuit which takes the tone controls out of circuit when set to the flat position.
More specs and pictures after the break.