I keep hearing that the M2ti and M22ti are extremely accurate and that's why they make some recordings sound bright and harsh. I agree that the frequency response curves measured in an anechoic chamber are very flat, but it's the in-room response that's important.
I have recently auditioned the M2ti, M22ti and M3ti in my small (12' by 13') listening room. This room has many book shelves. It was no surprise that the M2ti and M22ti sounded a bit "tizzy" and harsh on some recordings compared to the M3ti. The M2ti and M22ti did seem to have a little more detail, but it seemed to be a little exaggerated (similar to Grado headphones). I measured the frequency response of each speaker and found that the M3ti was very flat, but the M2ti and M22ti had a 4 db boost from 4KHz to 8KHz. I think this explains what I was hearing. Maybe in a larger room the results would be different.
I'm keeping the M3ti and returning the M2ti and M22ti.
