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In Reply to: RE: Inlow Sound's 130 Hz midbass horn posted by hottattoo on March 11, 2016 at 07:45:06
Comparison between TAD TD4001 and JBL 2441 BE in 290 Hz (16") Sierra Brook tractrix horn in 500-3k range was not favorable to 2441BE . It (2441BE )sounded like half of the driver , shy, anemic slightly lifeless. It was however much more pleasant , spacious and even if used "full range" Maybe magnet on my 2441 is weak ? Tad sounded , rugged, energetic hate that word but it fits the character -"punchy" , just alive. It sucked used full range. After half an hour I had the desire to take the axe and chop it off the horn.
Follow Ups:
I'm not sure if I will end up using the TAD long term. When I heard them in large JMLC horn they were first order crossed at 700 hz and sounded fantastic. I've never heard any compression driver sound good down to 500 Hz while still having some "meat" to the sound. It's looking like 400-500 Hz that I may need to hand over to the compression driver if I want to keep good fidelity with a ~ 90 hz midbass horn.
JBL 2490 looks like a good candidate, but that titanium diaphragm (though it may not be an issue in the lower ranges I want to use it at). I asked Radian if they would make me a one off Be, they must have thought who is this joker :D JBL CMCD-61 is looking like another attractive option.
Wojciech,
My Tad 4001 experience on a 13" (Dr. Bruce) salad bowl tractrix horn is similar to yours, very detailed, lively, but OMG, my ears were about to bleed !!! I tried twice to listen to this combo but gave up. I traded the tads a friend who bought a pair of proper Tad wood horns and it now sounds excellent.
The JBL 2441 with Truextent Be diaphragms and re magnetized motor were much better then the Tads on the salad bowl horns. They were clean, clear, nice tone, excellent imaging, nice high frequency extension BUT you had to get the EXACT placement / distance to ear from the horns perfect or you lost the image pronto !!! The head in a vice comes to mind.
I now use a field coil converted JBL 2441 with Be diaphragms on a 25.5" ( 200hz. ?) heavy mahogany Sierra Brooks tractrix horn---my search for a great mid range driver /horn combo is OVER !!! I now have a sweet, clean, clear mid rang with excellent tone from 450hz to 8k. I use a Lambda lp-531fm variable power supply (0-20volt) set to 14 volts and kick back. I have heard lots of drivers including the Cogent field coil drivers (excellent) and want for nothing. There may be better more exotic drivers (GOTO,ALE etc.)out there but I will never know !!!
Wondering who did the field coil conversion and exactly
what is the difference in sound.Also, did you compare the
Be to the Radian diaphragm ? Thanks for any info.
I have no experience with the JBL field coil conversion, but if you haven't seen Joe Roberts' post on field coils I found it interesting. Link attached below.
Thank you for your post. I will send 2441 to good folks at GPA to get them recharged.I was little disappointed that truesound BE diaphragm with mylar suspension compares so miserably to stiff TAD's roll off surround in low midrange performance when crossed at 500hz 6db.
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