Alpine 3555 worth rebuilding ?

[TT2ENT 10+ year member]

One channel makes speakers crackle @ high volume and an echo like reverb effect on voice frequencies @ low volume (well until the music is louder than the noise).

Sooo is this waste of time tracking down the bad components ?

From what I can see the 2 big brown caps are bulging

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and the 2 caps in the middle of that row of 4 are bulging.

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visible damage in RED

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All input much appreciated.

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[Grinder1989 5,000+ posts]

Those big caps, from the pic anyway, look fine. The little ones need replaced but don't look that bad. Probably not what's causing your issues. You either have bad rca's, a blown channel or an input issue.