Quick soldering question

How hard do you think it would be to resolder the aux input to the Phones jack and vice versa?

on what?

On my GK, and also a Fender Bassman 10

On my GK, and also a Fender Bassman 10

those jacks are likely PCB mount so pretty hard sicne the connections from the circuit to the jack are traces on the boards and not flying leads if the jacks are baord mounted. I still wouldn't recommend running long leads from a jack to the input or output of the amp even if it's PCB because any sketchy lead dress with long leads could cause excessive nosie or even oscillations. Amp layout is nothing to be trifled with.

Damn. I want to run some mics through the aux input of my amp but I can't find an adapter from an instrument cable to a 3.5mm jack.

I had to pretty much rewrite this this because for a sec I forgot you were talking about the aux input and was thinking about instrument inputs and I posted a paragraph on microphones versus pickups, but here's the layman's skinny on consumer level line-in circuitry versus microphone preamps.

there are even more issues at play in this scenario than the ease of unsoldering and resoldering jacks... you have balanced versus unbalanced lines, stereo use of TRS versus mono TRS connections, impedance mismatching, preamplification factors... a microphone wants to see 600 to 7k ohms the consumer equipment an aux input is designed to handle will need a load at a max of 600ohms for the -10 consumer line level that is about 2 volts peak to peak to hit the rpeamplification stage with flat response so you're killing mic output and top end right there using it as a mic input.... your microphone needs a higher impedance because while the output impedance is very low (unlike a guitar pickup that needs a good 1meg for fidelity due to low level AND high impedance) the peak to peak voltage is probably under a volt (assuming its a dynamic mic). COnensers are even designed with a preamp built in but are matched to preamps load ranges that also work for dynamics and ribbons because there's some uniformity between these various preamplifier types these days. We have steady agreement on what type of circuit should be used for pickups, microphones, studio line levels and consumer line levels and they are all quite different just like those 4 sources are quite different. I could go on. You're fighting a lot of issues here. That aux input isn't designed to handle a microphone but it probably could handle a mixer output, especially if its a mixer with a consumer -10 mode. It'll present that with appropriate clean gain and impedance and the mixer can give your mics the extra gain and higher impedance they need. A mixer with only a pro +3db output level willt end to distort that -10 input even with the output way down. But the impedance should be pretty solid and despite some clipping everything should be operating with appropriate bandwidth.

So just to be sure I'm understanding, maybe I should look for a mixer with a consumer -10dB mode? If so, then I think I should be okay

it'll have a switch on the abck that toggles between -10db and +3db... common on 80s stuff, prosumer grade... you cna try a pro line elvel, maybe it'l work without cliping the aux input.

To be honest, I'm not even worried about clipping the signal, that'd sound kind of cool. But I'll certainly look

EDIT: https://reverb.com/item/15623028-fostex-model-450-1985-black Something like that?

it probably won't sound as coola s you're thinking... some clipping soudns better than others. Soemthing like an aux input wiill probably not saturate slowly, its wide bandwidth for input rom an iphone or cd player so it'll be extreme onset of hard transistor distortion laoded with odd ahrmonics that'll turn your peaks to static

YMMV

you can TRY anything (as long as you don't mess with output impedance on a tube amp, that's a recipe for a blown transformer most of the time)... but engineers design things the way they do for pretty good reasons and there's never going to be a universal analog input. Line inputs aren't designed to receive raw signal froma transducer the way that mic preamps and guitar preamps are. Apple wasn't thinking about having a nice hot signal to keep a good signal to noise ratio when recording when they designed the output on the iPhone. The reason there's a pro line level that's different than consumer hifi level is that when recording to tape we really needed better signal to noise then we're worried about when listening in the living room.

Hmm, actually, you've given me an Idea^TM