Hi Chesseroo,

My latest xls file on crossover frequencies shows the M3ti, M40ti, and M50ti all use 2.2 kHz as the crossover frequencies.

The M22ti and M2i use 2.7 kHz crossover frequencies.

The hybrid tweeter on the QS4 has a 1-inch titanium dome but a 1/2-inch voice coil instead of the 1-inch voice coil on the QS8s and other models.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)