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Might need to buy two new speakers I guess? Or as I said... just spaff some cash.
its unlikely to be the jack itself, as you are getting sound to some of the circuit
Egg sucking time - if you have a wiring issue in the cab, you might end up spaffing cash on a new amp instead ..the amp might not be seeing the impedance it expects to and that could lead to some serious issues
It would be unlikely for two speakers to blow at the same time.
Cayn you take the back off and take some detailed photos?
Do you own a multimeter?
Studio: https://www.voltperoctave.com
Music: https://www.euclideancircuits.com
Me: https://www.jamesrichmond.com
What make of cab and speakers are they?
The low-volume dull sound is the two speakers being driven as ‘passive radiators’ by the air inside the cab by the way, not them partly working.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I do own a multimeter. What should I do?
Studio: https://www.voltperoctave.com
Music: https://www.euclideancircuits.com
Me: https://www.jamesrichmond.com
So I guess I need to replace the jack?
Studio: https://www.voltperoctave.com
Music: https://www.euclideancircuits.com
Me: https://www.jamesrichmond.com
I’ll defer to ICBM and ecc83 as I am not completely sure of the part.
I’d be making up a wiring loom though if it was my cab but appreciate you probably just want a simple like for like part swap.
Studio: https://www.voltperoctave.com
Music: https://www.euclideancircuits.com
Me: https://www.jamesrichmond.com
Using jack switches to reconfigure cab impedance is a recipe for this, as Dave said I would say . The switch contacts are simply not adequate or robust enough to handle the sort of currents involved, and a small amount of corrosion getting in, or the jack being strained by the cable being tugged, is enough to make a bad contact. Depending on how it's wired, if you're unlucky it can leave the cab open circuit and blow valves or the amp's transformer.
Personally, unless you really need the two different impedances or the stereo option, I would remove the whole contraption and hardwire the cab for 16 ohms to one standard Switchcraft open-frame panel jack. (Or two in parallel, which gives you a backup or a method of daisy-chaining cabs.)
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein