Basicly, I lopped the ND25 tweeter off the wave guide and siliconed a ND28F-6 in it's place. It fits exactly the same and one would be hard-pressed to see any difference once installed.
Then I installed the cross-over that Matt Grant designed for his NEXUS series of speakers(pubicly avail.).
He describes it here;
I wasn't sure how adding the wave guide to the mix would work out, but so far I'm liking the results, the sound is large and full enough for me to rotate them into a main speaker slot.
All this comes at a cost w/ the tweeters and components for the complex X-overs coming to about $200 and the X-over won't go thru the woofer opening(I split it and put the tweeter board inside and mounted the woofer board on the backside.
It may seem crazy to spend $200 on a $140 kit, but if you have a nicely finished pr. of C-note that are gathering dust, I think it would be worth it. Heck, even if one was starting fresh, a total of $340 isn't bad. They seem to be on par w/ my other low-cost DIY bookshelves, like the original Aviatrix or Paul Carmody's The Girl from Ipanema.
I guess the test will be longer-term listening to see if I can live a pr. of mini-tweeter mains, something I haven't been able to do yet.
Then I installed the cross-over that Matt Grant designed for his NEXUS series of speakers(pubicly avail.).
He describes it here;
"The crossover is about 2100hz, fairly low but the ND28 handles it well without any rise in distortion. .....I chose to add a decent amount of BSC into these designs which gives them a very full sound. The midrange is very clear but not overbearing, and the treble smooth without sounding dull. Bass is again very good for such a compact speaker."
That's a very accurate description of what I ended up with. Everything else is stock C-note w/ the box lined w/ light duty felt sheets and stuffed rather full of poly, I can detect no resonances and I can only summize the C-note's 700Hz. nastiness is a result of it's low-cost X-over forcing the woofer higher that it likes and being unable to tame the resulting vulgarities and much less to do w/ box construction or diamentions, vent port, etc.I wasn't sure how adding the wave guide to the mix would work out, but so far I'm liking the results, the sound is large and full enough for me to rotate them into a main speaker slot.
All this comes at a cost w/ the tweeters and components for the complex X-overs coming to about $200 and the X-over won't go thru the woofer opening(I split it and put the tweeter board inside and mounted the woofer board on the backside.
It may seem crazy to spend $200 on a $140 kit, but if you have a nicely finished pr. of C-note that are gathering dust, I think it would be worth it. Heck, even if one was starting fresh, a total of $340 isn't bad. They seem to be on par w/ my other low-cost DIY bookshelves, like the original Aviatrix or Paul Carmody's The Girl from Ipanema.
I guess the test will be longer-term listening to see if I can live a pr. of mini-tweeter mains, something I haven't been able to do yet.
Last edited:
