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Old 30th November 2012, 05:28 PM   #1251
jzagaja is offline jzagaja  Poland
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Fatbattery - isn't it Tractrix: 110, 200, 350, 600, 1000 what you look for?
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Old 30th November 2012, 09:06 PM   #1252
Scaper is offline Scaper  United States
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I just wanted to let everyone know that I are working on group buy #4 for the Autotech horns and waveguides.

The pallet should fill up pretty quick, so if there's something you want, please let me know as soon as possible.
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Old 1st December 2012, 12:11 PM   #1253
NiToNi is offline NiToNi  United Kingdom
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Quote:
Originally Posted by jzagaja View Post
Yes this is interesting. When get enough interest from DIY...
Well you can put me down for the first one

What's your best guesstimate of how great of an efficiency boost you could achieve?
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Old 1st December 2012, 12:18 PM   #1254
jzagaja is offline jzagaja  Poland
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No more than 6dB.
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Old 1st December 2012, 08:16 PM   #1255
jzagaja is offline jzagaja  Poland
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Here is example of impedance autosequence followed by show parameters sequence. Some noise below 10Hz is visible. Can be grounding problem or back emf - resistor instead of speaker measures similarly.
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File Type: png bnr-cal-param.png (49.3 KB, 568 views)
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Old 1st December 2012, 09:47 PM   #1256
jzagaja is offline jzagaja  Poland
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BMS 4590 impedance around resonance with calculated parameters.
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File Type: png bms4590.png (29.4 KB, 551 views)
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Old 2nd December 2012, 08:05 AM   #1257
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Default exponential horns

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Originally Posted by jzagaja View Post
Fatbattery - isn't it Tractrix: 110, 200, 350, 600, 1000 what you look for?
No while it may not state it on this goto add. I believe goto horns are exponential as they suit better there old Western electric type of driver design as a lot of older pa drivers are too. While I understand that most people want to use tractrix and lcleach with modern drivers. I have these horns and drivers. I want to try exponential with older designs with phenolic diaphragms like the Ev 1829 that with a long enough expo horn will go lower then most drivers. They are designed for vocal use 200 to 2-3k . The goto's are about 2k$ up wards in the 300b to 150b. It wouldn't surprise me if you done a non alloy 1 3/8"ones they probably would sound better and be lighter to mount anyway. Then buying goto and having to convert them to 1 3/8" sockets. As stated in my last post a 1 3/8" to 8 inch expo would be really handy even. I have lowther horns and other mid bass horns that size.


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Old 2nd December 2012, 08:07 AM   #1258
jzagaja is offline jzagaja  Poland
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If you have some dimensions let me know.
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Old 3rd December 2012, 02:33 AM   #1259
tuyen is offline tuyen  Australia
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Received my 600 e-jmlc horns today. Excellent build quality. Maybe the 600 were bit too big for channel that wanting only to play >2khz. the 1000 version might of been better option?

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Old 3rd December 2012, 04:26 AM   #1260
badman is offline badman  United States
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Regarding aquaplas- I made my own "baddyplas", using tacky glue and talc. Applied to selenium d2500ti diaphragms, (same embossed Ti as the 220Ti used for "Econowave"), it made a very nice difference to the highs- they sound fuller but less spitty. I attribute this to a likely general smoothing of the top end peaks and dips.
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