Mp3/Ipod Lead to Guitar Amplifier




About: Known for my crazy ideas, i like to build improvised weaponry, have been arrested many times for possesing this in public places/ firing. Check out my group -

Very very easy and simple, takes about two seconds but it works very well.

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Step 1: Materials :

Old broken headphones,
Old guitar lead (to connect to Amp / Old jack plug, larger than 3.5mm),
duct tape.

Step 2: Cutting...

Cutt the old headphones away and just have the lead, no speakers.
And cut the guitar lead in half, or to whatever size you need/want it

Step 3: Connecting

Strip about 1" of rubber away from the end of the wires, so you have the bear wire...

On the guitar lead kinda, untwist it so you have two, rather thick metal wires, and on the small jack plug lead you should have 4 wires, one green, one red, and two 'normal' copperish/gold colour.

Connect the two normal wires to the two on the guitar lead (i just twisted them lol)

Then cover each of the connections (both of themm!!) with duct tape so they dont touch, then go round both of them with more duct tape so now it is like one wire, with a little bit of duct tape on.

Plug nd play:D
Simple but very good, better than using a homemade amp

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    61 Discussions


    13 years ago

    you realize that you run the risk of hurting whatever guitar amplifier you're plugging into. The signal coming from a guitar is a very low ohm (200k ohms) and the aplifiers expecting that low of a signal. When you put a headphone signal (16-8 ohms) to that input you are just asking to overload the preamp and blow the pre section right out of that amplifier. What he is describing here should only be done if you want to blow your guitar amp.

    8 replies

    Reply 11 years ago on Introduction

    200k < 16?
    Wow, ok then...
    Cant guarantee this is correct, but just throwing this out there:
    my granddad has been working with guitar amps and bass amps since they used tubes, my uncle has been working with amps since he was 12 - he's now almost 40.
    According to *both* of them, nothing of this sort will damage them unless you have the volume incredibly high *on the input device*

    the main issue is hooking a powered output to a amplified input, all you have to do is turn down the volume on your ipod/whatever before you hook it up

    in fact i record my guitar via no more than a 1/4 <-> 1/8 audio adapter on my computer, have been doing so for over a year, no issues

    Again, no guarantee, that's just what I've heard and experienced myself


    Reply 10 years ago on Introduction

    True. That's why I phrased it "run the risk of hurting whatever..." Tell your granddad hi for me. And ask him if he wants to add an adjustable bias pot to my early 70's twin. (kidding)


    Reply 10 years ago on Introduction

    After I repaired my Eighty-Five, (Bad 1 watt resistor and leaky capacitor) I modded up a cable like in this instructable, and used it to watch a DVD from my laptop, as my laptop speakers are broken. It worked pretty well, but the amp did get warm (however, it usually gets fairly warm, and the volumes were fairly loud). On top of adding a 1/4" out for an external speaker, I also used computer heatsink paste and added 3 heat sinks from an old WANG VS server computer I tore apart, to keep the amp cooler.


    Reply 10 years ago on Introduction

    if that DI box was made to make line level signals instrument level signals. (i.e. a Reamp)


    12 years ago on Introduction

    it doesnt matter what age your are, you obviously have no knowledge of electronics whatsoever, so take your $100 wannabe fender and shove it its just stupid to post something like this think of it as line/mic inputs you could destroy your comps sound card if you put it on the wrong setting, why chance your ipod or amp??? btw, hows it doing now???? id like to hear about it

    4 replies

    Reply 12 years ago on Introduction

    to put it in layman's term, think of it as if you have an empty bottle of water with a low ohm guitar signal, that will fill up the bottle of water. with an amplified circuit such as a computer or any other electronic device, you fill up the bottle of water and it overflows, destroying anything that was near it. horrible analogy yes, but i think i got my point across just go look at mullers comment or something lol


    Reply 12 years ago on Introduction

    so basically the ipod or whatever has a high z output compared to the guitar? most headphones/ outputs are 8 ohm and im not sure what guitars are( but they are low impedance?). you can put a low impedace input into a hich input but not the other way or you will blow the amp up? so as i see it it should work fine, but dont plug a (high impedance) bass or microphone into it.. am i correcet in what i say???


    Reply 10 years ago on Introduction

    If you really want to do this and not screw up your amp, I would recommend getting a High Z to Low Z DI box from Musicians Friend/GuitarCenter/Etc. Just plug your MP3 player into the High Z "In" end and your guitar cable into the Low Z "out". Simple =]


    10 years ago on Introduction

    The point is to eliminate noise or buzz, and that can be done with a humbucker guitar pickup, which is what amps use. But, don't spend that much money -- you can accomplish the same with an audio transformer. These are cheap and small (thumb-sized). Solder one side's terminals to a plug to the CD player; solder the other side's terminals to a guitar cable (or a plug that will take a guitar cable). I used this setup with "play along" CDs (karaoke for guitar). Clean!

    It might be a good idea to solder the wires after twistin them to ensure a good connection. This will eliminate a lot of fiddling around trying to twist the wire for a good connection.

    1 reply

    11 years ago on Introduction

    The sound is awful when you do this because the speakers are designed for only the frequency of the guitar.