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John W
10-07-2006, 04:21 PM
I was inspired by the beautiful pair of C30s that recently came up for sale and decided to put some of my extra drivers to good use. The result is a smaller bookshelf version using a pair of 8in D208s, 035ti tweeters and a modified LX-8 crossover. The boxes outside dimensions are 16 5/8 w x 11 h x 9 5/8 d. There is one port 1 ¾ d by ¾ deep, which happens to be the thickness of the MDF.
The LX-8 crosses over at about 2khz. It was designed utilize the natural roll-off of an LE14, which doesn’t really work the D208. To compensate I added a 1.5mh air core inductor in series with the woofer to add a gentle 6db roll-off.
The results are surprising. I haven’t done any additional measurements on them, but to my ears they sound very good.
John W
10-07-2006, 04:22 PM
Here is a picture of the inspiration.
Zilch
10-07-2006, 06:06 PM
Verrry nice, once again, John. :thmbsup:
johnaec
10-07-2006, 07:15 PM
'Quite the fertile mind there, John. Nice!!

John
Mr. Widget
10-07-2006, 08:45 PM
Probably sound better than your Bel-Aires... but I still covet them.:D


Widget
spkrman57
10-08-2006, 06:28 AM
for a killer system with rich details,
spkrman57
10-08-2006, 06:28 AM
Very nice craftsmanship on that project!

Ron
John W
10-08-2006, 07:33 AM
Add a sub... for a killer system with rich details,
Yes a sub is a nice addition. The system I have these hooked up to has a 12 in sub.
macaroonie
10-08-2006, 07:49 AM
Nice work. You have a good pair of hands ...:applaud:
spkrman57
10-08-2006, 08:46 AM
Does the 035's keep up with the D208's?

I'm thinking the D208 is more efficient, not sure though.

Ron
John W
10-08-2006, 07:58 PM
Does the 035's keep up with the D208's?

I'm thinking the D208 is more efficient, not sure though.

Ron
They sure seem to. I will have to do a little measuring on the RTA and post the results. The best information I could find is that the 035tia has about 92db sensitivity and the d208 about 95db.
jtgyn
10-09-2006, 05:12 AM
Very nice John.

Regards Scott
spkrman57
10-09-2006, 08:15 AM
3db difference, but with crossover setup are probably closer to the same when used in your room.

I like the project idea!

Ron



They sure seem to. I will have to do a little measuring on the RTA and post the results. The best information I could find is that the 035tia has about 92db sensitivity and the d208 about 95db.
glen
10-10-2006, 01:45 PM
VERY nice work!
I love the little teeny brass exclamation point emblems.
(the final proof that you've been consumed by JBL madness)