The IP-421 iJam Cable Instrument/Amplifier Interface for iPhone from Ampridge allows you to play a guitar through your iPhone, iPod touch, or iPad while listening to the sound through your instrument amplifier. It works with all iPads, iPhone version 3 and higher, and the iPod touch version 3 and higher.
Simply connect the 1/4" phone plug into the normal input on your amplifier, plug the 1/8" mini plug into the headphone jack on your iPhone/iPod/iPad, and then plug your cable from your instrument into the 1/4" jack on the IP-421.
The cable allows you to play a guitar thru your iPhone, iPod touch, or iPad and listen to the sound through your amplifier. Simply connect the 1/4" phone plug into the normal input on your amplifier, plug the 1/8" mini plug into the headphone jack on your iPhone, and plug your instrument cable from your guitar into the 1/4" jack on the IP-421
The circuit inside the cable eliminates popping found with other cables and does not drain device batteries or need batteries like other brands
Works with iPod touch version 3 and higher (iOS 5 Software or higher)
Works with iPhone version 3GS and higher and with all iPads (iOS 5 Software or higher)
You can download apps such as GarageBand, Amplitude, iShred, Guitarfx, Jam Amp, RiotFX, Jammit, and RecordStudio. The GarageBand Amp module normally reverses the phase between L/R channels so the monitor output is canceled but recording will still work. You can defeat this in the settings under crosstalk protection but the input volume must be set to minimum