Re: High Frequency Compression Driver Evaluation
Hi Art,
First apologies for taking so long to reply. I was behind on something and would not do a comprehensive search till I finished.
As for method I used Praxis with stepped sine waves.
There is a huge difference between what you did and the data I have.
I collected Harmonic Distortion to see where I could put a crossover frequency. I never thought of using them in such a project as yours.
Mostly because I don’t get the wide sweep of drivers you tested.
About 2/3rds or more were BMS drivers on a variety of horns.
One of the favored drivers is the 4552ND (1” throat)
As for how valid my conclusions are, they are an impression I have come to over near a decade of working with BMS drivers and that driver in particular.
One of my glaring faults is the lack of skill in storing my data so that I can find them later if needed. As I said before the tests I did were done for a very different purpose and attention to detail may have been lost.
I do not recall throwing away distortion data for any of the tests I did, but I can not find more than one or two.
I did switch computers so all the data may be saved in my external back-up drive. That said it should still have found it in a search.
As time permits I will keep looking since it has become an irritation.
So in absence of solid data on my part we have you with data and me with a recollection that the BMS 4552ND did better at higher levels.
That married to a good horn and a very nice BMS 12” it sounded very nice indeed.
At near 60 years of age and many years of narcotic pain killers makes my memory less then reliable.
Thanks for the work.
