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In Reply to: RE: Altec bug got me. 511b horns. posted by Jon L on November 19, 2024 at 19:32:06
Don't limit yourself to antique drivers, i rebuilt a pair of A-7's about 15 years ago and used a BMS4550 and JBL 2226 woofers. Re-tuning the box and a new crossover added an octave more response at each end.
IF those horns are mounted on a wood baffle with rubber tape, there is no need for further damping.
Follow Ups:
modern ones.
I happen to already have a pair of Radian 475PB compression drivers, so I'll try them on the altec 511b once I can find some shorter bolts that will fit. I know that many people with Altec 806 compression drivers already use Radian diaphragms.
But there's a side of me that whispers to keep it in the Altec vintage Alnico sonic signature. If I can find some good and reasonably priced Altec 802D, 808, etc. Less so for 806..
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I've owned several Altec Drivers since I was 18, 808, 802, 902, etc. also Radian Aluminum Diphragams for my jbl 375, 2440, 2441, 2445, 2447, as well as a few of their 1" drivers etc. Radians are fine aluminum diaphragms bested only by their beryllium ones.I also have a pair of 4550's and have had them in Tom's little Runts and SH-50's.
The 4550's are far superior to any of the Aluminum Ones of any type in terms of output to 18 Khz. with lower distortion than the rest of the 1" throat offerings.
Time to get with the new Millennium for gosh sakes, instead of Nostalgic Listening!
Edits: 11/22/24
I guess I may have a bias against anything with word polyester. I would have thought Alu, Titanium etc would have more forward, sparklier sound, which is a signature I kind of like. And I can dsp/eq down the nastier peaks.
A driver should have no "signature." IDK what the 4550 uses, it' just WORKS.
My current preference for a 1.5" driver is the Faital Pro with a Poly type diaphragm. It sounds terrific for home use on the right horn.
Edits: 11/23/24
Most damping is a waste of money when the horn is solidly bolted to lumber.
Easy to try and measure with/without.
I had a pair of those when I was 18 in their own 3/4" cabinet, free of ringing.
I have always rejected comments made without data to support them.
Too many people do "emotional testing" or look to mythical opinions, even though they are simply WRONG!
Tom Danley is correct about this and he can certainly back up his claims with more data and results!
Edits: 11/20/24 11/21/24
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