GPA-100 : I wasn't convinced at first, but it's PHENOMENAL

At first I wasn't convinced to the idea. Just wanted to test and see what the hype is all about.

My concern was about bass+mid+treble EQ - instead of traditional depth/resonance + presence that power amp suppose to have

So treble is acting 100% like the presence in my Randall RM100, it works in frequencies of presence, not treble.

Bass isn't a traditional depth/resonance or it's waay more sensitive. You can completely shake your cab or remove the low-end. It's super cool.

Mid can almost turn your G12T75 speakers into V30's or you can scoop your amp to that early Scott Burns death metal sound.

Turn up mids in preamp and cut them in GPA-100 or vice versa, cut in preamp and crank up in GPA-100. It's another cool feature and extra tonal possibility.

I'm going to buy second GPA-100 to make dual amp rig!

I have no idea if it's loud or not - tested it only in bedroom volumes, read other opinions.