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Picture of Wireless Mic to Guitar Hack
Wireless Microphone Mod (1 of 16) (Custom).jpg
Wireless Microphone Mod (13 of 16) (Custom).jpg
Wireless guitars are great, without cables to trip on the life expectancy of an energetic guitarist is greatly increased.  However, they are expensive, way more expensive than wireless microphone systems.  In fact, if you're like me, you might happen to come into a wireless microphone system for free.  Using it for your guitar is a ultra-simple hack that almost anyone can do in less than an hour.  



 
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Step 1: Tools and Materials

Picture of Tools and Materials
Tools required:
  • Soldering iron
  • Wire strippers
  • Drill and 3/8" bit
  • 1/2" wrench
Materials required:
  • 1/4" guitar jack
  • Solder

Step 2: Disassemble

Picture of Disassemble
Before you rip into the mic, test that it works!  It could save headaches later.

Most of these mics just screw together to allow for the occasional cleaning.  Twist the top off and pull out the microphone-holding center piece.  Cut the wires as long as you can so that there is enough slack that the wires don't break when the microphone is screwed back together.  If there isn't enough you may need to extend them a few inches.



Step 3: Drilling The Top

Picture of Drilling The Top
Using the 3/8" drill, drill a hole in the top of the microphone, through the mesh.  Using a drill press and vice is best for this, since it is likely to snag on the mesh.  Do be careful.

Once the hole is drilled, apply some tape around the inside, on the top of the mesh, and beneath.  Its likely that if the guitar jack makes electrical contact with the housing of the mic, it won't work properly.  I had this problem and I solved it with tape.


Step 4: Wire the Jack

Picture of Wire the Jack
Wireless Microphone Mod (4 of 16) (Custom).jpg
Strip the ends of the two old microphone wires and solder them to the lugs of the 1/4" guitar jack.  I guessed that the red one was signal and green one was ground, but I don't think it matters.  If there is an issue, try flipping the wires.

Step 5: Re-assembly

Picture of Re-assembly
Wireless Microphone Mod (6 of 16) (Custom).jpg
Push the jack up into the microphone head and attach using the included washer and nut.  Tighten with the 1/2" wrench. 

Screw the head of the mic back onto the body.  Plug it in and test it out!
Hi mat . . Your hack was absolutely easy and simply superb . . I have a question. Usually some presentation microphones come along with a wireless transmitter with an input for microphone jack. Can this transmitter be used directly to plug in the guitar cable ? Thanks
mattthegamer463 (author)  Silvester Jay1 month ago
Most cheap microphones used now are a type called "electret" microphones, which have a built in transistor that amplifies the signal from a small condenser element into a more usable signal that is easier to work with. This is a good idea for sound but if you want to apply an electrical signal from a guitar instead, it is more difficult. The transmitter is expecting a signal that is probably 100x higher than the signal from the guitar, also there is a voltage being applied to the microphone jack so that the transistor can be powered, and some people say this can affect the sound of the guitar.

In short, it can be done, but with a wireless transmitter the volume may be too low. I have plugged my guitar into my PC mic port before and it works, but the sound quality is very bad and the volume and microphone boost must be maxed out to hear anything.

The reason this particular hack works is because this wireless microphone used a simple condensor microphone and not an electret, so the signal levels from the condenser and the guitar were of similar power.
cdpoloz10 months ago

Hi, pretty awesome hack! Do you think it could work with low frequencies from a bass guitar?

mattthegamer463 (author)  cdpoloz10 months ago

Should be fine. It might be filtered to minimize frequencies at 60Hz and below though.

Ok! Hope to test it asap and I'll let you know, thanks!

Is it possible to solder a capacitor or resistor to the jack then the wires so that you can use the guitar at full volume?
mattthegamer463 (author)  jdelgadillo11 year ago
You can add a resistor, but that would just be the same as turning the volume down, since your volume knob is just a resistor anyway, and it would be more permanent. You may want flexibility for different guitars and pickups.
idydstie1 year ago

could you put a resistor in series with the jack so that you could turn up your guitar without the signal distorting? Also, is a dynamic microphone an electret or a condenser?

mattthegamer463 (author)  idydstie1 year ago
I think possibly adding a load resistor would help reduce the voltage from the coils. Also, a dynamic mic is neither an electret or a condenser. Electrets are just a subset of condensers.

http://en.wikipedia.org/wiki/Microphone#Dynamic_microphone
DirtyMex3 years ago
wouldnt you be able to do the same thing with a guitar hero mic but instead of it being wireless wouldtnt you also be able to connect it to a computer per say?
mattthegamer463 (author)  DirtyMex3 years ago
Possibly. One thing is that it is important that the mic element is a condenser type, not an electret microphone element. Electrets have integrated amplifiers and require a DC offset voltage, meaning they will have a much higher voltage output than a guitar, and will put DC into your guitar coils which may not be good.

These problems can be solved with a small transistor amplifier circuit.

Also you would need a driver for your PC to be able to use the guitar hero mic on it.
do you know which kind the guitar hero mic is? thanks.
mattthegamer463 (author)  washburnhero2 years ago
Almost surely an electret. They are cheapest and used in 99% of microphone applications.
jensenr303 years ago
really neat!
i like it!

thanks for sharing!
yellowcouch3 years ago
My grandpa and i are actually doing the exact same thing right now.... I think even the same MIC's ... our problem is that lets say you want more than two MICs (i think the kit came with two mics and a receiver) if you bought 4 of these they use the same frequencies as each other and so one drowns out the other. Do you know of any fixes for that?
mattthegamer463 (author)  yellowcouch3 years ago
The system is basically just an AM radio and transmitter, so usually to modify the frequency you just open it up and bend an air-coil a bit to change the transmitter frequency, the problem is that the receiving coil must be bent in the exact same way to match, its a time consuming process. It could also end up ruining the mic or receiver if you can't ever get them to match up again.

Also that would require modifying the receiver so now you would need 2 receivers for 4 mics.
Elipsit3 years ago
Well done! With all of these great inventions under your belt you should start your own company!
mattthegamer463 (author)  Elipsit3 years ago
Yes I should. You are hired. 8 AM Monday.
That is an awesome way to make a wireless guitar. Totally original and simple, the marks of a great instructible.
mattthegamer463 (author)  cyberviper423 years ago
Thanks very much :)