Your favorite smaller size compression driver

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#62
profiguy said:
I tried the lavoce DN10.142 and its a flop. This driver has some QC issues, likely with the VC gap alignment and you can hear what sounds like the VC rubbing down lower around the 2 - 4k range - could be due to a rocking mode excited around the primary resonance. Either way, it's not living up to my expectations. The 60mm size was a huge factor. Too bad.

I'm going to try the Celestion 1730, as it shows the most promise and isn't too pricey. We'll see...
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I have a pair of these DN10.142 (only listened to one so far)
It seems to have a "hard" edge to vocals that is unpleasant.
It's in a unity horn, and I took great care to make the throat transition smooth.
But I attributed this to hardness to my DIY horn construction.

But maybe this VC rub is what I am hearing?
Thing is, I made distortion measurements and didn't see anything looking so terrible.
What does the VC issue look like on a distortion plot?

I will put the other unit on a nice horn (QSC clone) and see what I get.
Bummer though, the small size of this thing and low XO is integral to the design of my cabinet.
 
#63
I already sent the lavoce drivers back and don't have documented measurements on them. I can tell you there was a VC rocking mode at the primary resonances with these drivers on all of the WGs I tried. It was especially worse with smaller WGs that didn't load the driver that well down low, so likely a reactive thing coupled with lower acoustic loading around the resonance peaks. Either way, this driver wasn't going to work.

I've been playing with the B&C DE7 and have had some promising results removing the front chamber, directly mounting it to a 1" WG, but it requires modifying the phase plug and the driver itself won't really cope with xovers lower than 4k without sounding rough. As a super tweeter it looks promising with its 1" VC. Pictures to follow...
 
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