What type of amp is it, is it a hybrid and if so how do hybrids work??
its got a tube in the preamp section, it gives it a little bit of a tube-ey tone, not as much as a full tupe amp, but it still sounds very good.
Can it do Metallica? I also have a multi effects pedal will it help?
You'd use the preamp section very little if you use your multi-efx pedal instead. I don't like the AD series because it sounds too bassy and dark. There's a high gain version of AD out now but I never played it before.