the yamaha 720 lists 8ohms
90W per channel (8 ohms, 20 Hz-20 kHz, 0.09% THD, 2ch driven)
105W per channel (8 ohms, 1 kHz, 0.9% THD, 2ch driven)
and the pioneer speakers mention an impedance of 6 ohms. would that be an issue? has anyone set them together?