Also keep in mind that, since power = I^2(R), you are asking the amp to deliver about 40% more current at 4 ohms than at 8 ohms. Although it may be capable of doing this without tripping, you could start to encounter clipping or distortion past 70W with a 4 ohm speaker.

LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7