Running a microphone into aux input

JohnHurley

JohnHurley

Rock and Roll
So it turns out that my new Yamaha THR30ii will both play a backing track via bluetooth while it also plays simultaneously something fed in via aux in. ( Of course it also accepts guitar feed also at same time ).

So I guess I can use a microphone somehow feeding into aux in and guitar while playing backing track. What kind of preamp or microphone booster might work well? Any recommendations etc? I think usual microphone outputs dont have enough oomph to work well fed into auxiliary inputs ...
 
CaptainMoto

CaptainMoto

Blues Voyager
At very least you'd something like this.
https://www.amazon.com/COLICOLY-Fem...t=&hvlocphy=9021458&hvtargid=pla-907940323863

However, that may not give you enough signal so a pre amp might be the solution.

There are a number of inline mic preamps that help boost mic levels but, they require 48v phantom power.
That aux input does not provide power so they will not work.

Look into this, It might work:
https://www.sweetwater.com/store/de...e-for-sm-smartphones-tables-and-video-cameras

If that doesn't give you enough boost, it has it's own 48v power so, you could add an inline preamp for more gain.
Something like this:

https://www.sweetwater.com/store/de...Iq4Sz1pp6maFq73YpPgaAjbVEALw_wcB&gclsrc=aw.ds

I'd call Sweetwater, see if that thing will work in your situation.
 
dvs

dvs

Green Mountain Blues
You need to convert the mic-level signal to line level. Get a small mixer with at least one mic preamp built in. Run the control room out or main outs to the aux input on the amp. Something like this is the minimum you'd need, but really almost any mixer you could choose would do the job. https://www.sweetwater.com/store/detail/502--behringer-xenyx-502-mixer.

That mixer doesn't have phantom power, so you'd want to use a dynamic mic (like an SM58, for example), but a dynamic mic is a better choice for what you're doing, anyway.

This one is a level up in the same line, has a few more inputs/outputs, and phantom power for condenser mics https://www.sweetwater.com/store/detail/802--behringer-xenyx-802-mixer
 
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JohnHurley

JohnHurley

Rock and Roll
Thanks Moto yeah I have been kind of looking around in that area of your second link ... battery powered preamp thing ...

I have mixers etc just looking for something small portable.
 
CaptainMoto

CaptainMoto

Blues Voyager
JohnHurley said:
Thanks Moto yeah I have been kind of looking around in that area of your second link ... battery powered preamp thing ...

I have mixers etc just looking for something small portable.
Click to expand...
Just an FYI,
I believe one of the Yama amps has two mic/instrument inputs.
I think it's the acoustic version of the THR30ii
 
dvs

dvs

Green Mountain Blues
An issue that you're going to have is that inline preamps and adapters like Moto has suggested are mono, so you're still going to have to do something to get a stereo input for the aux in, otherwise you're only going to get the mic in the left channel. Impedance matching is also something to consider - there's a little more to this than just boosting the signal.

A mixer takes care of all of that. There are a few mixers that run on batteries - I've never tried one, but they exist.
 
CaptainMoto

CaptainMoto

Blues Voyager
dvs said:
An issue that you're going to have is that inline preamps and adapters like Moto has suggested are mono, so you're still going to have to do something to get a stereo input for the aux in, otherwise you're only going to get the mic in the left channel. Impedance matching is also something to consider - there's a little more to this than just boosting the signal.

A mixer takes care of all of that. There are a few mixers that run on batteries - I've never tried one, but they exist.
Click to expand...
Good points.
However I believe the IK irig unit puts out a stereo signal thought the mini plug.
The manual says it has +48db gain, that should get you in the ball park with a dynamic mic.
I can't speak to what the impedance is.

What seems simple usually aint.
 
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PapaRaptor

PapaRaptor

Director of Curmudgeonry
Staff member
I'd get a Zoom H1n recorder. Stereo mics, battery operated, mic stand mountable (with 1/4" adapter) and you can run the headphone output directly into the Aux in of your Yamahaha.
Zoom H1n
Actually I'm cheating. I already have the older H1 (same basic function) and have done exactly what you want to do, but on a Fender Mustang I.
And when you're not using it, you have a really handy, high quality stereo audio recorder.
With the H1n, one of these 1/8" to 1/8" stereo cable
and a mic stand adapter, you can take on the world.
 
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JohnHurley

JohnHurley

Rock and Roll
Yikes well that amazon 25 buck purchase dont seem to work at all so far. It turns on light turns green but no sound.

It has a 4 "output" aux output and also a headphone out jack for monitoring but I cant seem to get any sound of it either of those. Think my 25 bucks is toast unless I screw around with amazon return. Will test it out going into iphone etc maybe theres something peculiar with jack output or it needs certain things connected to work?
 
CaptainMoto

CaptainMoto

Blues Voyager
Oh boy :(

If the headphone out doesn't work either that sounds like a problem with the unit.

Call the Sweetwater boys, see if they have a solution.

Just an FYI:
I sent a tech request to the IK Multimedia Support Team.

I asked if that Irig pre amp unit would work with an aux in.
Just received a reply

Hello Captain,

Thanks for your patience while we got back to you.

The IRIG PRE 2 is only compatible with the following:

iOS and Android Devices
Compatible with iPhone, iPad, iPod touch and Android devices with 1/8" / 3.5mm jack standard headset input (onboard or via adaptor) compliant with the CTIA/AHJ wiring standard, which is illustrated as follows.

K3nCPklDTAeO0q6z9zZzQYzRcibzy-xbNR12EhraCT_vc4TKkWcznVZqf-XukxDPa6fjbsnWFNjBw-oYEw4QL3rCkwnuwxZMwTQO5kIV1B_dZBMkT8YE8VK6bFzC-ya8tQ=s0-d-e1-ft



DSLR Cameras
Compatible with most DSLR cameras equipped with 1/8" / 3.5mm jack microphone input.

Any other device is not directly supported.

I'm not informed enough on electronics to determine if that's a "cover your ass" we don't support that reply, or if there is truly something about those types of units that just can't work in an aux in????
 
dvs

dvs

Green Mountain Blues
That headphone out should work plugged into the amp's aux input. I wouldn't be totally surprised if the supplied TRRS plug gives you a problem, but I would've expected that to work, as well.

1) What are you using for your source? If you're using a mic, it should be plugged in with an XLR cable.

2) Can you play another device (like a phone or tablet) directly through the aux input on the amp? I think there is an aux level control that you may have to adjust, as well.
 
CapnDenny1

CapnDenny1

Student Of The Blues
I was thinking about your ebay thingy.

The XLR jack goes to the mic input of the iphone.

The audio out from the iphone goes to the headphone jack. You need that because when you plug the supplied 1/8" plug in you can't plug in headphones.

So you will need it plugged into the iphone and the iphone monitoring the mic input, and thereby sending the signal to the headphone output of the iphone.

It won't just take the mic input and send it to the headphone jack. But it probably does send it to the 4th ring (mic) on the 1/8" plug.
 
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