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Dynaco PAT-4

Solid State Stereo Preamplifier (1971)

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Dynaco PAT-4


The Dyanco PAT-4 is an all silicon solid-state control centre and preamplifier which must be used in conjunction with a basic power amplifier, such as the Dynaco stereo 80 or Stereo 120, and a pair of loudspeakers.

In addition, the PAT-4 provides sufficient power for a pair of 600 ohm headphones.


Frequency response: 10Hz to 100kHz

Total harmonic distortion: 0.05%

Gain: 54dB (MM), 20dB (line)

Input sensitivity: 10mV (MM), 500mV (line)

Signal to noise ratio: 70dB (MM), 85dB (line)

Semiconductors: 8 transistors, 2 diodes

Dimensions: 13.5 x 14.25 x 9 inches

Weight: 10lbs


instruction/owners manual   English -

pictorial wiring diagram   English - beekeeperfred

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re: PAT-4

Many thanks for this manual. Now I can use this good old dynaco preamp.

Dynaco pat4

thanks bob

Dynaco Pat4

Thanks Bob, this schematic will help get the Pat4 up and running. Connected to the Bose 1801 amp and the Bose 901E's it will soon have the house rockin'.

This website is not affiliated with or sponsored by Dynaco. To purchase PAT-4 spares or accessories, please contact the company via their website or visit an authorised retailer.