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I currently have no experience with setting up fx processors for live/rehearsal use through a guitar cabinet, but I am thinking about obtaining a Helix (maybe Axe Fx if I'm patient enough) to add a digital rack setup on top of my current tube amp/cab/pedals setup. Just to have the best of both worlds. I want to stick to a solid state power amp, but do I go Rocktron Velocity 300 or Matrix GT800FX/GT1000FX? I obviously want to maximize my sound in terms of quality, but also in terms of volume without blowing my speakers or being too quiet. I'm not sure how wattage in a sold state amp affects this, and I'd like to go Matrix, but only if they don't destroy these cabs with one small or bad turn of a knob because of their high output capabilities -- 400w/channel or 800w bridged for example -- into a 280w Mesa 4x12 (live/rehearsal) or 120w Orange 2x12 (home). But I can't afford to have the 300w Rocktron be too quiet for a live or rehearsal situation even if it does suffice for at-home use. Bottom line: Which power amp should I get and how would I avoid damage? I see people using the Matrix's all the time with cab setups but how do they not blow their cabs? Just keep the Matrix turned down low all the time? Is it an impedance thing? Side note: The Orange also only has a 16 ohm option so without rewiring how would that work, if it can at all since I believe these amps do 8 ohms? I know there's other options for speaker setups but I'm asking specifically about guitar cabinets... for now. I play heavy music. Much appreciated.

Hi. I've got HD500X and I love it. I'm going to rehearse in studio with it and my question is> will I need addition guitar amp using with HD500X? Or is it enough to play just with HD500X and back closed cabinets? Will I get that deep fat distortion through cabinets only with HD500X? Thank you.