what size allen keys do i need, im guessing there metric casue my imperials set either spins or doesnt fit...soooo what size metric key do i need.

Just get a metric set. Cheaper by the dozen.

Sorry, don't know that specific size.

300/2

If this is the manual for your amp, it says a 25mm hex wrench (aka allen key) is what you need.

yea its 2.5 mm...thankyall....finally an answer to a psot that didnt cause any arguments....the olympics has succeeded