Ipods always sounded nasty to me, you can hear the converters distorting. They might have fixed this on the newer ones but the Cowons always sounded nicer to me.
Are you using mp3s for your backing tracks? the mp3 codec always introduces a slight amount of crosstalk between the channels. Make sure you are using .wav
I do this with guitar tones all the time, so why not with kicks? Its obviously cancelling out the bad sounds and leaving in the good. If it works, it works.
you could place the A/B pedal on the fx loop perhaps? so if you are playing through the amps pre it will still go out through the fx return and back again. might work.
Just sounds like a gated verb to me, but obviously not ridiculous 80s style. there's a LOT of automation just on the reverb it seems, like the release of the gate depends on the tempo?
Further to this, I always try and use an emulated line out from any guitar amp for live stuff, whether that's out the back of the amp or through one of those DIs with speaker emulation. Works extremely well on Marshall JVMs.
Im guessing your cab has 4x 8ohm speakers wired as 2 parallel pairs:
each pair=1/8 + 1/8 =1/4 so 4ohms x2 =8 ohms
if you replace one pair with 16 ohms it would be 4 ohms + 8 ohms = 12 ohms overall. It would be safe to run but you would get less output (might be a good thing?)
I just got back from playing a sold out village hall in the middle of nowhere with my folk band. Our gigs are always packed and the whole band earn a living wage from gigging.
My metal band always had a meagre and boring crowd.
TBH i think it comes down how good your band is as a live...