It's not a massive power amp..
Its listed ratings...
- OUTPUT POWER (RMS) @ 12.0 - 14.4 VDC, 1% THD:
- • 5 Ch @ 4 Ohms: 20 W x 2 + 50 W x 2 + 150 W x 1
- • 5 Ch @ 2 Ohms: 40 W x 2 + 90 W x 2 + 270 W x 1
So with a 3ohm speaker load you will get power levels between the 2 and 4 ohm load ratings.
Prob 30/70/200w
So its a 5ch amp....
But you want to bi-amp the front speakers so effectively using 2ch per side leaving the 5th ch for a sub.
So it will effectively be s 2+1 amp.
.