Re: High Frequency Compression Driver Evaluation
Marjan,
You are correct, the tests show the Eminence PSD 2002 goes quite a bit lower, but not as high as the BMS 4550 and 4552.
The series 1 diaphragm have a roll surround, the series 2 have a kind of rectangular oval pattern in the surround.
The series 2 diaphragm goes to about 15kHz (the series 1 about 12.5 kHz) but has rougher response.
I have to admit that most of what goes on above 12.5 kHz makes little difference to me, as 16 kHz unfortunately is the upper end of my hearing, and my sensitivity is quite a bit less above 12.5 kHz.
The PSD 2002 does require more EQ to get a flat response than the BMS drivers.
No joke, the comparisons show the bolt on PSD 2002 (with a series 1 diaphragm) can go louder with less distortion than the two BMS drivers tested.
The Eminence PSD 2002 survived some serious power in the tests I conducted, and I have had only one failure (and that was with the series 2 diaphragm) in many years of use. The Yamaha club series uses PSD2002 and does not seem to have any more problems with the driver dying than is usual for cheap cabinets used (and abused) by inexperienced operators.
Are your PSD 2002 thread on or bolt on, and what series diaphragm?
Listening to the BMS music and sine wave recordings, do you think the BMS drivers sounded better than the PSD 2002?
If so, what is it that sounds better or worse to you?
Art
