Best answer by Ken_Griffiths
The speakers’ power rating should be at least 125W for 8 ohm speakers, and at least 200W for 4 ohm speakers.
Do not connect speakers rated at less than 4 ohm.
Note: The new Amp can drive speakers with nominal impedance above 4 ohms. Two pairs of 8 ohm speakers wired in parallel are also supported. But do not wire your speakers in series because it will result in poor sound quality.