The M-40's work great in my room, about 13 X 17. They are probably the best monitor-type speaker I have heard. Some people have problems with the warmth of the M-40, but I think it is because they are accustomed to the modern "lean 'n mean sound" that increases apparent (not actual) detail. If you go to any decent concert hall, you will not hear this lean 'n mean characteristic.
Listen to the Cream live at Albert Hall CD through the M-40's, you will know what it is all about.
Listen to the Cream live at Albert Hall CD through the M-40's, you will know what it is all about.