i think i made a few amps like that, the best i found back then was one that had 4x55W (4 ohm) but at 2 ohm it was rated at about 110Wx4 (at 16.5-17V), TDA7560, of course the 100W+ is PMAX, but back when i used it in a cheap but POWERFUL BI-AMPED system, used 24DB (4th order) active filters (Also DIY for EXTREME precision)

The 7560 is also MEGA easy to set up, almost no components, and it has a very good audio quality