10uF Mundorf Supreme... exactly the same as before... I seem to be happy with 1uf on my tweets, haven't yet played with a 2uF.
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Thread: Horn project - stupid questions
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14-02-2010, 08:05 PM #441Founding Wammer
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imported post
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14-02-2010, 08:09 PM #442.
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10uF is more like it for 1kHz
& this is with the Stereolab horns?
what are you having to use to attenuate the S2 & tweeter? Wirewounds do slug the hf. I was quite shocked by traces I ran with & without L-Pad attenuation
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14-02-2010, 08:10 PM #443Founding Wammer
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murray johnson wrote:
On the S2 - 9dB l-pad with Duelunds. Standard resistors on the tweeter. I'm deaf above 14kHz anyways10uF is more like it for 1kHz
& this is with the Stereolab horns?
what are you having to use to attenuate the S2 & tweeter? Wirewounds do slug the hf. I was quite shocked by traces I ran with & without L-Pad attenuation
edit-you'll just have to come and listen!
edit2-Sterelabs as the Azuras won't fit... unfortunately. The Azuras do blend better.
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14-02-2010, 08:11 PM #444Team Coco FTW!
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Is it the source impedance of the LPAD? Or just the inductance? Have you measured how inductive they are?
In the endless battle between theory and reality, reality has yet to lose.
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14-03-2010, 06:13 PM #445Founding Wammer
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I post this here as it parallel's my experience and provides a recipe for people wanting to build a horn system using modern drivers at a very reasonable cost. Also very well written with all the technical measurements.
http://www.audiodesignguide.com/HiEff/HiEff.html
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30-08-2010, 09:42 AM #446Wammer
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Dismantling? What happened?
It's never too late to have a happy childhood.
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31-08-2010, 06:24 AM #447Super Wammer
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Hi JJ, very useful link. I put together some open baffles and at present run 15" woofers with a 130w rotel amp and 8" full range drivers with 2A3 mono's. At JVS ( jims ) bake off it was agreed that there was cone break up from the 8" drivers and adam ( amdismal ) suggested limiting the 8" drivers frequency range to give it less to do. I decided to cut it off at 3000hz and have been looking at compression drivers and horns to cover from 3000hz upwards. It looks like there is an affordable way forward with the BMS drivers and tractrix horns on the stereo labs site.
Originally Posted by jonjin
main system: 15" open baffle bass, 200Hz auto-tech tractrix horn with BMS 4592mid, Raal 140-15D , Rotel RB861, J Sound labs 300B, 6n6P, 6h8c, 5C4M set DEQX PDC, MHZS cd88, Garrard 401. Colarro 2010
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23-10-2010, 06:59 AM #448Founding Wammer
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Exploring options for 150Hz horns. Not many people make them. I'll update very slowly...
http://www.autotech.pl/pdf/audio_en.pdf
http://www.bentwoodhorns.com/
http://www.stereo-lab.de/EN/spheric-...rns/index.html
and Azura of course (where this all started)
http://www.bcae1.com/xoorder.htm
http://sound.westhost.com/lr-passive.htmLast edited by jonjin; 13-11-2010 at 11:04 PM.
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30-10-2010, 09:04 AM #449Founding Wammer
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Christmas comes early to chez JJ
RCA 9448 - 1.4" throat
Last edited by jonjin; 30-10-2010 at 09:07 AM.
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30-10-2010, 12:23 PM #450Team Coco FTW!
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Ooooh! Either that's a "children's" size cigar, or them are very big.
In the endless battle between theory and reality, reality has yet to lose.
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30-10-2010, 01:33 PM #451.
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Can't wait to hear how that goes. What's the plan re horns to attach to them?
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30-10-2010, 01:47 PM #452Founding Wammer
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Them are big mama Cohiba cigar! Originally Posted by i_should_coco
Ooooh! Either that's a "children's" size cigar, or them are very big.
No definitely plans yet. Still trying to find a 150Hz horn. Coco might have one spare Originally Posted by murray johnson
But this will be a far in the future project as the room is too small. It will be a 4-way:
tweeter
S2 down to 1kHz
9448 200-1kHz
probly folded bass horn
JJ
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30-10-2010, 01:59 PM #453There is no honk
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WTF - a cigar?!?! Jeez man, haven't you got something that is actually a practical way of illustrating scale - like a ruler?!? A CD?!?!? You're a doctor, for crying out loud!?!?
Cool though
Fuck the horns, I just listen to the Snells now.
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30-10-2010, 02:00 PM #454.
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Poof! Originally Posted by jonjin
Them are big mama Cohiba cigar!
No definitely plans yet. Still trying to find a 150Hz horn. Coco might have one spare
But this will be a far in the future project as the room is too small. It will be a 4-way:
tweeter
S2 down to 1kHz
9448 200-1kHz
probly folded bass horn
JJ
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30-10-2010, 02:12 PM #455Founding Wammer
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LOLOLOLOLOLOLOLOL Originally Posted by murray johnson
Just tested the pair and thank gd they both sound clean and healthy.
edit, Adam, cigar is 18 cm long...Last edited by jonjin; 30-10-2010 at 02:33 PM.
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30-10-2010, 04:35 PM #456Team Coco FTW!
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No need to brag. Originally Posted by jonjin
In the endless battle between theory and reality, reality has yet to lose.
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30-10-2010, 09:45 PM #457Super Wammer
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Nice one JJ with the RCA's and the hamlet moment - Hopefully I will have something 7" diameter to show you in a few weeks.
Ipod Pure I-20, Battery ACK dac, Power amp Transcendent SE OTL 1.5W, plus Behringer ultracurve digital cross over and disco amp for bass, Speakers DIY 3 way Open Baffle, Hawthorne 15"Augie, Audio Nirvana 8"er and RAAL 140-15D
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30-10-2010, 10:32 PM #458Team Coco FTW!
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So, you wanna get some 1.4" to 1.5" throat adapter made up then?
In the endless battle between theory and reality, reality has yet to lose.
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31-10-2010, 02:23 AM #459Founding Wammer
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Ok boss Originally Posted by i_should_coco
edit to add spiel from ebay...
Here we have a rare pair of RCA MI-9448 permanent magnet theatre compression drivers. As I understand the RCA models, the 9448 was produced from immediately after World War II until approximately 1950 when it was replaced by the MI-9458. I do not know what the differences are between the 9448 and 9458; the examples I have seen of both feature the same diaphragm and drilled hole pepper pot phasing plug. These units, like the WWII-era drivers produced by RCA for the U.S. Navy, featured a larger, heavier magnet structure compared to the later 9458 series. In the mid or late 1950s the 9458 series debuted, and carried the RCA theatre systems through the 1970s in A, B and C versions.Last edited by jonjin; 27-12-2010 at 09:48 PM.
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27-04-2013, 04:57 AM #460Registered
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Jonjin
You "box" is full and cant be sent messages. Please empty so I can send you a message about 9448's thanks
cheers
Alan
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