#1
the Pre and Post all the way to get massive amounts of gain without destroying the world. Does this harm the amp? Also, is that EFX RET meant for headphones adapters, I'm thinking not because the sound is diminished by it, but it's still there from the speaker?

Thanks guys.
#2
...

The return input RECEIVES the sound.....
Peavey 5150
Mesa Mark IV
Mesa Single Rectifier (Series 1)
Fender Custom Shop Tonemaster
Roland Microcube

-Whitebox OS 1x12
-Port City OS 1x12

Digidesign Eleven RackAxe Fx Ultra
#4
Does the classic have a Efx send? That might be your best bet, although, line level is pretty high for most headphones to handle.
Peavey 5150
Mesa Mark IV
Mesa Single Rectifier (Series 1)
Fender Custom Shop Tonemaster
Roland Microcube

-Whitebox OS 1x12
-Port City OS 1x12

Digidesign Eleven RackAxe Fx Ultra