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No sound after mounting in enclosure (Read 349 times)
naaac
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Posts: 3
No sound after mounting in enclosure
09/08/17 at 22:12:30
 
So I successfully built my amp on a piece of wood to test everything. Everything worked and sounded great on the first try.

I desoldered the transformers, the volume knob, the included RCA jacks, and the speaker jacks to mount the whole thing in an enclosure.

I added my own RCA input jacks and my own speaker wire connectors and ran leads to the center hole and one of the three ground holes from the 4-prong RCA jacks (left the other two holes on the ground plane open as I figure it doesn't matter?) and I ran single wires from each of the speaker jacks to the according pos. and neg. terminals on the PCB.

I ran individual wires from each of the volume knob pins to the appropriate pins on the board (Verified correct orientation).

I have remeasured the 4 measurement points after mounting and powering up and they all are exactly what they should be.

But I've got no sound now! With the volume all the way up I can hear a tiny bit from 92dB/w/m speakers very faintly (that were blasting when I built it on the wood), but I also hear the sound coming from one of the output transformers.

Any thoughts? I visually inspected all connections and components and everything looks fine. There are no errors as I didn't change anything from when it worked before. I fear in my desoldering I may have damaged one of the volume pot holes. Not sure what else it could be?
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naaac
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Posts: 3
Re: No sound after mounting in enclosure
Reply #1 - 10/25/17 at 21:51:31
 
FYI an Update:

The problem was really simple and dumb.
The speaker terminal posts I added to the aluminum case were slightly touching the case on their way through the holes, grounding the output. Amp is working perfectly now, dead quiet, and sounding so good!



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naaac
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Re: No sound after mounting in enclosure
Reply #2 - 10/25/17 at 21:52:55
 
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« Last Edit: 10/25/17 at 21:53:54 by naaac »  
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busterfree
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Re: No sound after mounting in enclosure
Reply #3 - 10/25/17 at 23:04:59
 
Looking good. Enjoy
Smiley
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