My Onk sets my QS10s to 50Hz. Of course this is room and position-dependent. I love the bass from them. If Ian built a QS with triple HP drivers, I'd upgrade in a heartbeat.

With my old Denon, I'd get an out-of-phase warning from time to time during calibration with the M80v2. I knew this couldn't be based on the centre image I was getting and a quick mono pink noise test confirmed the Denon was getting confused.

It really is a night and day difference as you say and this is due to multiple factors in the v4. It's not only that they are larger, have one more woofer and are HP. The M3v4 have none of that and sound better than the M80v2.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated