4 ms·
> A continuity test is your friend. Also a spray can of freeze (e.g. CRC Freeze Spray) is useful, and a jeweller's loupe (x20 magnification or so). If your pho
by tuatoru 4y ago
> A continuity test is your friend.
Also a spray can of freeze (e.g. CRC Freeze Spray) is useful, and a jeweller's loupe (x20 magnification or so). If your phone takes good macro video, that can be really useful to look at several times (in the absence of a stereoscopic microscope).
Contacts are the first thing to suspect with any fault. Check inside the plugs on the cables.
For intermitttently disappearing and reappearing bass, though: probably the contacts are OK. Inspect (and if possible, re-make) solder joints in this part of the circuit - you may have a hidden dry joint somewhere. Then old electrolytic capacitors, especially tantalum ones, are sources of trouble.
Of course if the amp has been in a house that's been hit by lightning, or where an arc welder has been used regularly, then the possibilities widen.