The Monster 3250 sonic quality is similar to Krell KAV 3250. Compared to Classe CAV-180, the Monster 3250 is warmer sounding and definitely has extended high frequency resolution. I had to adjust my Rel sub level and frequency lower a notch. It has less air between instruments but has excellent micro-dynamics and solid pin-point imaging. It is not edgy, sibilant or etched specially when listening to female vocals like Patricia Barber's "Companion" cd. No listening fatigue here. On the low side, it is less forgiving like the Classe. There is also that strong acrid smell.
The Monster compared to Classe is also fun watching movies. Details, details and more details. I have to switch back to Classe and make some more comparison.
I switched back to Classe amp and the mid-range resolution is more seductive. I think the Classe is a better match with my speakers, cables and pre-amp. I have to switch back to Monster 3250 and make more comparison.