Possible HIGH END compression driver coming.
I wanted to update this thread about a CD I've been working on and needed to get some opinions. Over the past couple years I've been ordering and testing compression drivers and compression driver parts. I probably have 40+ different models and even more parts that I work with. Basically I interchange things, ask for different diaphragms to fit different bases, change out foam, phase plugs etc. I've heard titanium diaphragms, mylar, polyimide, phenolic, coated, etc from Celestion, BMS, B&C, JBL, and 18-Sound.
There was a combination that I was working on last year but put it aside when I got busy with all the SEOS-12 projects. The CD itself looked really nice, and had some great features. It's response wasn't bad, but had a titanium diaphragm and I prefer something different. I asked the manufacturer that makes the diaphragms for the DNA-360 to send me some different parts. Last week I finally got back to this project and I might have something that truly stands out. But possibly too expensive to mess with.
I test every single CD before they're shipped out. I've heard the typical 'werp, werp' test tone hundreds of times, so it's pretty easy for me to hear differences in models and brands and also pick out any that don't sound quite right. The B&C DE250, DNA-360, and BMS-4550 all sound great and test great. They're incredibly similar, and nearly identical when a crossover network is applied to each one to level them all out.
So a few days ago I start messing with this nice looking model again. It's the DNA top of the line loaded edition.
Neodymium magnets, aluminum phase plug, copper shorting ring, full gaskets outside, full gaskets inside to seal everything up. I drop in the new poly diaphragms and one really stood out. I could definitely hear a difference in this model compared to the other CD's. It has that strong sound that I've heard in some 18 Sound drivers using titanium, but smooth and not fatiguing. The low end is great, the high end is really good for a CD like this. Actually, the high end is better than any I've seen. I'll post some response curves later tonight if I have time.
The problem is going to boil down to the price of getting all the parts, so I'm not sure it's worth pursuing or not. Neo magnets, aluminum phase plugs, copper rings, and different parts coming from different manufacturers. I think they would add up to being a decent amount over $100, likely over $125. Shipping is expensive from other countries, and when they come in different packages or pallets, that price has to be divided over a fairly small number of pieces. B&C has a similar neo magnet model that's already priced fairly good, but uses a titanium diaphragm, different terminals, and a back plate with a different internal volume. The overall set up is a bit different too.
Has anyone seen another brand or model like this:Here it is next to the DNA-360Here's the bottom:Here's the inside showing all the goodies: