this post was submitted on 28 Oct 2023
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Beginner - Amp/Mic Advice Needed (aussie.zone)
submitted 1 year ago by Sarsaparilla@aussie.zone to c/guitars@lemmy.world
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Hi There! I am a beginner to amplifiers and I purchased an Aroma AG-15a for busking, which has separate guitar and mic inputs. I purchased a dynamic stage mic (Behringer BA 85a) and an XLR to 1/4inch stereo TRS cord, but there is no sound when plugged in, even with both volume knobs on the amp turn up to full. I tested the dynamic mic on a different guitar amp (no mic input) and it worked, so the mic is not faulty.

I rigged up a connection to the problem amp with a battery powered Zoom H1N recording mic, and it worked, but this is obviously not the mic I want to use for performing. Everything I read says a dynamic mic is plug and play in this situation. I am finding it impossible to find information anywhere about whether there is something wrong with the amp, if I need a different mic, or I'm doing something else wrong.

So having watched a few videos, I discover that I might need a Mic Impedance Transformer to get 'power'/volume to the dynamic mic. Is a Mic Impedance Transformer a type of Mic Pre-amp?

Should I buy a Mic Impedance Transformer or a Mic Pre-amp??

P.S. I made a connection via a Hum Eliminator, and actually heard the mic thru the amp for the first time, but it is still very soft.

How do I solve my problem?

PLEASE HELP!! I'm tearing my hair out!

Thanks in advance for your expertise in this.

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[โ€“] Aliendelarge@lemmy.world 2 points 1 year ago (2 children)

If the amp is a TS input, it is unbalanced and needs a XLR to TS cable. It does matter going from balanced to unbalanced signal. Double check me on that though with. Multimeter or pinout diagram or something.

[โ€“] Sarsaparilla@aussie.zone 2 points 1 year ago (1 children)

Hi and thanks for the advice! You are correct that:

It does matter going from balanced to unbalanced signal.

A standard mic cable has done the trick and I've been practicing all evening. Much appreciation for the help! ๐Ÿ˜Ž

[โ€“] Aliendelarge@lemmy.world 2 points 1 year ago

Glad you were able to get it sorted out!

[โ€“] Sarsaparilla@aussie.zone 1 points 1 year ago* (last edited 1 year ago)

It does matter going from balanced to unbalanced signal.

That's fair. I'm going to get a standard XLR-TS mic cable tomorrow and try that out. ๐Ÿคž