On the heels of my recent success building a 215 for my V4B, I am interested in building a 2 Ohm 410 for my Acoustic 470. The amp is rated at 170 Watts "independent on load" - how is this possible? Am I really only going to get 170 Watts out of this, no matter the cab's impedance? Anyone have any driver suggestions? As far as frequency response, I like 'em low.