#1April 29th, 2006 · 02:29 PM
31 threads / 5 songs
178 posts
Spain
Plug microphone into valve amp?
Hi,

I'm doing some experimenting with recording my acoustic, and I havent done this yet, but I was wondering... I have a small valve amp that has a DI out. I was wandering about pluging the mic into it to see what the recorded sound from the DI out would be like - passing the acoustic sound through the valve circuitry. I don't want to do this right away in case I bust the circuits in the amp.

The manual for the amp doesn't say not to do it, it just says that it was built for electric guitars but you can use it for other instruments too.

So, does I does or does I doesn't do it?

Thanks.
#2April 29th, 2006 · 02:45 PM
37 threads / 25 songs
237 posts
United States of America
does
i think ampeg was the 1st solid state amp could be wrong but all the old PA s were tubes
shouldnt hurt it might get lotsa feedback id stay as far awy as i could
#3April 29th, 2006 · 02:46 PM
31 threads / 5 songs
178 posts
Spain
I can disable the speaker, so that should reduce the feedback shouldnt it?
#4May 1st, 2006 · 07:30 PM
7 threads
104 posts
United Kingdom
Not Recommended but.....
if that's all you've got to work with then....
- check your mic does not require phantom power (if it does, then plugging it into your guitar amp is not an option)
- the RTFM warning in the amp's manual may just be because the amp may colour/distort your mic's signal so they don't recommend it HOWEVER....
- depending on the amp's internal design, a rare problem back in the day was electrocution caused by a performer touching the metal pickups of an electric guitar and then touching a metal mic which was plugged into the same amp, thereby completing a (usually faulty) circuit. I even have a thing called a "lead fuse" somewhere, sold as the guitarist's life saver in those situations !

My recommendadtion would be to contact the amp manufacturer's technical dept. and check this out with them. If the reason was a bit of distortion, then you'll probably want to live with it. If it's 240V then you probably won't.
#5May 2nd, 2006 · 01:48 AM
121 threads / 56 songs
3,098 posts
Netherlands
pluggin mics into (valve) amps is common practice in punk and metal scenes. one reason why to not do it is because of feedback problems, and yes the signal will distort heavily but that's exactly why punks/metalheads do it.

(Testing) in a clean setting of my behringer blue devil (which is fake-valve btw) I can get a really decent and warm tone, inspiring enough to want to use this in a recording session some time.

I suggest just try it... wear rubber gloves and soles though
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