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dynaco 120

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103940
Printed Date: May 05, 2024 at 7:18 PM


Topic: dynaco 120

Posted By: 944guy
Subject: dynaco 120
Date Posted: April 13, 2008 at 12:39 AM

Hey, guys’ im having a problem with my amp it is a home audio amp but it has been great and its 42 years old. I use it in my home as a test amp to make sure people car speaker’s work. The problem is when I hook it up it doesn’t put out any power it puts out just as much if I had my laptop go directly to the sub from the headphone jack. In addition, if I disconnect the speaker wire the amp still plays music with no speakers hook up to it. It plays the full music to not just a certain note the hole thing its pretty quite but I can make out lyrics and what not. If any one has an idea of what is going on let me know because I love this amp and wont to fix it. Sorry long post.posted_image

Heres a pic and there is some info on the amp here. https://home.indy.net/~gregdunn/dynaco/components/ST120/index.html



Replies:

Posted By: DYohn
Date Posted: April 13, 2008 at 10:05 AM

Both channels are out?  You probably have a bad power supply, although if you loaded this amp with 4-ohm car stereo speakers you could have blown both output transistors.  These amps were designed for 8-ohm or higher loads.  They are fairly easy to work on as they were available as kits and parts are out there.  Lots of Dynaco fans in the world...



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