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Adding Microphone (XLR) Input

I have a cute little 25 watt amp that looks like it was designed in the early 70s ("all transistor!!"), nice aqua/silver speaker cloth over a 10" speaker. I want to set it up so that someone could plug an iPod in and sing along, or sing and play guitar.

The amp has 3- 1/4" phono input jacks, one off/on/volume and one tone control.

I would like to reconfigure it just slightly by changing one of the input jacks to a 1/8" mini phono, which I don't believe presents any problems, and by changing one of the other two to an XLR (microphone) input.

Will this work? Can I just swap it out? I don't know much about electronics. I have heard the term "phantom power" in re: microphones, but I don't really know what it means or how it works. Does a microphone like a Shure SM58 have enough output?

If changing a 1/4" phono input jack to an XLR input jack is NOT a simple one for one, then is there something else that could be done to make it work?

THanks!

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Replies to This Discussion

Permalink Reply by Grizz on August 5, 2010 at 7:09pm

I'm sure you can buy an adapter to go from ¼" to XLR. As a matter of fact now that I'm thinking about it here's a link to Musicians Friend where you can get one.

http://accessories.musiciansfriend.com/product/Planet-Waves-XLR14-A...

Permalink Reply by Sander on August 7, 2010 at 9:08am

A Shure SM58 doesn't need to be phantom powered. Also, this site might be helpful: http://www.mediacollege.com/audio/connection/xlr-jack-mono.html

Permalink Reply by Sander on August 7, 2010 at 9:20am

By the way, phantom power is only needed for condenser microphones, which contain active circuitry. Electricity is fed through the mic to power the circuit. Since a Shure SM58 is a dynamic, you have absolutely nothing to worry about.

Sander said:

A Shure SM58 doesn't need to be phantom powered. Also, this site might be helpful: http://www.mediacollege.com/audio/connection/xlr-jack-mono.html

Permalink Reply by wes carl on August 7, 2010 at 9:34am

R/S has adapters also plung in away ya go take the amp along to make sure it works been there done that good luck

Permalink Reply by David Sutton on August 7, 2010 at 10:24am

Thanks, all. I have one of those adapters--for some reason it works in my other amps but not this particular little odd-ball. A big part of my question had to do with... I just want to try it, you know, fun with solder!

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