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Old 3rd December 2012, 09:04 PM   #1261
badman is offline badman  United States
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Here is a still-drying final coat next to stock (and the speaker it's used in, with my OSWGs)

Took about 10 thin coats over the weekend to get it there, but it's overall a pretty thin coating. Based upon impedance sweeps, I added a little extra to one driver, which got them very close in electrical performance.

A slight reduction of frequency of the impedance peaks (about 5%) and damping of both peaks, especially the higher freq peak (which also fell from 12.5 ohms to 10.5) was the electrical result of the mod.

Coating Phragms 3.jpg

Current Speaker.jpg
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Old 12th December 2012, 07:31 AM   #1262
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Red face Correction about Horn Requests

Quote:
Originally Posted by jzagaja View Post
Fatbattery - isn't it Tractrix: 110, 200, 350, 600, 1000 what you look for?
I just found this historical piece on the formation of the Japanese horns driver industry and how Goto Split off from YL wanting to pursue higher Fidelity for home use. The important point being was my monumental **** up of requesting. Exponential profiles ans stating that goto used these. Here is a Cut from the article"

Goto did find out as well, that horns had to be short, to have low distortion and a correct sound. So , contrary to all others, he choose the hyperbolic profile. This profile has a important characteristic :
The impedance is constant almost from the cutoff Fc frequency, contrary to the exponential profile. This was the determinant factor of the choice of Goto. Whether current goto horns are expo or hyperbolic I don't know. I will do further reading and working on buying a pair too try the different drivers I am collecting. I still remain fascinated with the look of goto horns and from what I have read. Given the correct drivers. They could be suitable for my needs. I will pursue this with you further when I understand more.
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Old 12th December 2012, 07:45 AM   #1263
jzagaja is offline jzagaja  Poland
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Isn't JBL 2312 horn like Goto? Shorter the horn/waveguide unevener the response. EJMLC is hyperbolic. I know from Sonus Faber that ALE horns do sound very good.
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Last edited by jzagaja; 12th December 2012 at 07:50 AM.
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Old 12th December 2012, 09:19 AM   #1264
AndrewT is offline AndrewT  Scotland
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how can one recognise the difference/s between an exp & a hyp profile horn?
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Old 12th December 2012, 01:01 PM   #1265
Face is offline Face  United States
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Any updated on the SEOS-24?
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Old 12th December 2012, 01:33 PM   #1266
Scaper is offline Scaper  United States
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Quote:
Originally Posted by Face View Post
Any updated on the SEOS-24?
I just got measurements. It's roughly 15" x 24.3" with a minimum crossover at 500hz. 1.4" or 1.5" intake.
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Old 13th December 2012, 04:24 PM   #1267
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sounds great.... sign me up for a pair of SEOS-24s in black!! I'm looking forward to comparing them to the Iwata-300s in black I also want on this next pallet order....
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Old 16th December 2012, 03:36 PM   #1268
jzagaja is offline jzagaja  Poland
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A little experiment with Titan 48 subwoofer:

Titan48 - YouTube

driven with Beyma Power 15 and GDN-38-550-8-AE (Qt=0.9). Probably air leaks visible on impedance plot.
Attached Images
File Type: png Titan48_imp.png (41.2 KB, 492 views)
File Type: png Titan48_comp.png (35.6 KB, 414 views)
File Type: png Titan48_2H.png (30.8 KB, 413 views)
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Old 18th December 2012, 11:58 AM   #1269
jzagaja is offline jzagaja  Poland
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FP10 with wood veneer that goes to Germany next week.
Attached Images
File Type: jpg m2.jpg (429.5 KB, 438 views)
File Type: jpg m1.JPG (452.4 KB, 406 views)
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Old 18th December 2012, 02:01 PM   #1270
Face is offline Face  United States
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Any images or measurements of the SEOS 24?
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