Are these old amps worth fixing?

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I found a very old car-audio shop here in Atlanta who had some ancient classics. They sold them to me for dirt cheap and are worth the cost I paid probably for the outer cases alone.

I have yet to break these apart and play Where's Waldo, and will set up individual threads if I need a bit of help.

Are these any good for repair?
1 x Rockford Fosgate Punch 40 DSM that turns on and doesnt play anything
2 x Rockford Fosgate Punch 60 DSM. Both only work over one channel.
1 x MTX 4320 amp that doesnt turn on - probably has a lot of blown circuits.

Which would be the most enjoyable for fixing vs throwing away? The Rockford amps look very nice and clean and are missing end caps but have no scratches. They score a 9.7 out of 10 cosmetically. THe MTX is about an 8 out of 10. The MTX I am told can run an entire car, and the Rockfords are said to be very underrated.

Also coming in next week is my blown Hifonics Gen X Thor amp...

Gotta love the hobby!
 
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All the Rockford's would be worth it, the DSM were some of the best amps Rockford had. The little DSM 40, can run a set of 10's or 12's with no problem at all. Look on Ebay and see how much they run on that site, and that should give you a good idea of what they are worth.
 
To get the DSM amps working properly you'll likely have to replace every 10uF@16v SMD electrolytic cap in each amp. The preamp board behind the RCA jacks is also generally badly damaged by leaking capacitors. They can be repaired but it can be time consuming.

Most of the MTX can be repaired as long as the board isn't damaged. I'd recommend that you avoid the 5 channel amps (similar to the one you have) with the class D amp for the sub channel.
 
Good word.

Heres a pic of the 40 DSM on its back after repair. This amp works just fine after carefully resoldering the pre-amp board under the main PCB near the RCAs.

IMG_20101029_171526.jpg
 
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