twelvepoint wrote: Sun Apr 05, 2026 5:47 am I was playing bass the other day with a friend at his place. He has an old Ampeg 8x10 (cool!) but it was intermittent (not cool!). Wiggling the 1/4” jack seems to be the culprit.
From the outside, it looks like the cab uses a long barrel jack like this:
https://a.co/d/0a7SeuZc
There’s another hole drilled in the cab just above for what seems to be a second, similar jack wired in parallel but it’s just an empty hole.
Is this Switchcraft #151 the correct part to use? It seems like a little wimpy to put 300 watts through.
Again, this cab has just 2 holes in the back. No jack plates, and the holes aren’t big enough to use those goofy 4 pin jacks the very old 8x10s had.
How would you fix this?
Edit: my buddy will never get around to fixing this himself, so if I want to play a nice bass rig, it’s on me to fix it. It would be better to not have to modify the cab, but if enlarging the hole for a jack plate is better, we could do that.
The jack you posted aint right. 1) to properly tighten it you;d have to take off a speaker and move some batting around to get at the nut from the inside and 2) the shoulders are too soft for wood so you'd need big nuts (yes) on either side to keep the thing snug. The amp would have, I believe, originally had a jack plate and that's how i'd secure it now. Something like this:
