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Old 20th September 2010, 04:16 AM   #1331
nuconz is offline nuconz  United States
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Location: central north florida
Quote:
Originally Posted by thetubeguy1954 View Post
Hello Robert,

I believe we may have met at one of the CFAS meetings because your name sounds familiar. Of course it quite possible that it could simply be that Paul B. just mentioned to me that you're the one he sold/gave his nephew or friends Hedlunds to one time ---{I remember when they were sitting in his house}--- and that could be why your name sounds familiar too!

I was the guy with the shaved head and mustache at the CFAS meetings, at least when CFAS held their annual meetings at WMFE, that is. In any event nice speaking with you and hope you're still enjoying those Hedlunds! What drivers are you using in them and have you tried other drivers? I've tried 3 different drivers in the Sachikos before finally settling on the FE208ES-R drivers.

Thetubeguy1954 (Tom Scata)
i'm not robert. i'm frank. robert gave me the hedlund cabs.

i haven't been to the CFAS, i just remember Robert mentioning something about this group. i drove to orlando to get the cabs in june.

he said something about there being more than 1 pair of them.

Last edited by nuconz; 20th September 2010 at 04:26 AM. Reason: omitted something
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Old 20th September 2010, 07:50 AM   #1332
Dinosauro is offline Dinosauro  Italy
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Default For Zakman35

Hello Zakman35, I post you some link where you can see some photo of my creation. The cover of pre and amp is semitrasparent dark grey and the VU meter light shows part of the content. Thanks for your appreciation

http://web.tiscali.it/typeandtype/DI...le_e_pre_2.jpg
http://web.tiscali.it/typeandtype/DI...e_interno2.jpg
http://web.tiscali.it/typeandtype/DI...pre_accesi.jpg
http://web.tiscali.it/typeandtype/DI...pre_spenti.jpg
http://web.tiscali.it/typeandtype/DI...pre_spenti.jpg
http://web.tiscali.it/typeandtype/DIYaudio/Fronte.jpg
http://web.tiscali.it/typeandtype/DI..._interno_2.jpg
http://web.tiscali.it/typeandtype/DIYaudio/Retro.jpg
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Old 21st September 2010, 04:25 AM   #1333
navin is offline navin  India
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Quote:
Originally Posted by Dinosauro View Post
Hello Zakman35, I post you some link where you can see some photo of my creation.
OMG wow that is sooo good. You should sell these (not hte ones you made for your self but make and sell). Superb. Simply Superb.
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Old 4th October 2010, 08:24 AM   #1334
Sergii is offline Sergii  Ukraine
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Join Date: Oct 2009
Location: Kyiv
My new book shelf speaker Sonido SWR145Alnico.
In bass reflex 12 Liter.
Now is still birning in.
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File Type: jpg Копия Sonido SWR145A in BR.jpg (180.4 KB, 2757 views)
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Old 4th October 2010, 02:43 PM   #1335
Dobs is offline Dobs  Canada
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I love that finish Sergii, very nice job!
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Old 4th October 2010, 04:26 PM   #1336
Sergii is offline Sergii  Ukraine
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Thanks, Dobs

I also like this veneer - very good looking and affordable. Nothing unncessary.
Constraction like a tank -birch ply wood 18 mm, front 28 mm.
Very big sound for those babies with detailed, deep, 3-D sound stage.
Need till 200 hours to get the best sound they can.
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Old 5th October 2010, 06:33 AM   #1337
thoriated is offline thoriated  United States
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Default HT speaker prototypes

I built these out of 5" and 5 1/2" mailing tubes I had laying around and some spare 3/8" plywood & MDF scraps. Because of this, I could glue almost everything together except for some pieces in the bases & was able to complete both cabinets in one day. These are prototypes and I will make something a bit more solid for the final HT speakers. The drivers used are the Parts Express 289-106 they are selling for $7-8 apiece, which is a pretty good deal, IMO, since they are an Aurasound 'knock off' & share many of their virtues such as an underhung VC, long excursion and neodymium magnet. I performed a modification that brought the Fs of these speakers to about 60 hz which helps materially in their bass extension. The drivers are basically series/parallel wired to maintain the nominal 8 ohm characteristic.

I decided to use some xover components to avoid as much line array 'phasiness' as I could while also flattening the frequency response, so the outer six drivers are run below about 1.5khz to compensate for the baffle step of this cabinet. The center 3 provide the higher frequencies. Of these, the outer two extend out to about 5khz, and the center driver has a peaking circuit to boost the HF up to ~9db at 20khz, thus giving a reasonably flat response from 50hz to 20khz (including room gain) with an estimated average efficiency of about 87db/w/m. This HF peaking seems as if it should stress the driver's power handling a lot more than it actually does, since the driver impedance goes all the way up to 75 ohms at 20khz and an estimated power handling of ~200Wrms. Eventually, I plan to build subwoofers to go with these in a 7.1 channel configuration, but these two don't sound too bad to me as they stand for a start.
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File Type: jpg IMG_2076b.jpg (49.9 KB, 2635 views)

Last edited by thoriated; 5th October 2010 at 06:41 AM.
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Old 5th October 2010, 08:31 AM   #1338
felixx is offline felixx  Romania
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Small TV you have there........what brand is?
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Old 5th October 2010, 10:04 PM   #1339
thoriated is offline thoriated  United States
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Hi -

It's an Itsy Bitsy Mitsubishi DLP Energy Star
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Old 6th October 2010, 01:10 AM   #1340
thoriated is offline thoriated  United States
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I found something interesting regarding my pseudo-arrays:

A 'PBJ' in another forum posted the following regarding the transition from near field to far field in a vertical speaker array:

transition distance = ((array length ^2)*frequency)/2300

and that for a distance of 1 meter, the maximum array lengths were as follows to avoid the near field effect (i.e. much frequency response irregularity):

10khz - 0.265M (0.87ft)
5khz - 0.374M (1.23ft)
2.5khz - 0.53M (1.74ft)
1khz - 0.837M (2.75ft)
500hz - 1.18M (4.2ft)
250hz - 1.67M (5.48ft)
100hz - 2.65M (8.69ft)

Being lazy, I find it very useful that 'PBJ' chose a distance of 1 meter to calculate these numbers, since, for my HT surround application, it is possible that some watchers/listeners may be that close to one of them. By luck or happenstance, my HT design appears to be on the good side of these numbers, except possibly between 1.0 - 1.5 khz. So, I'll make a special note to group the drivers as closely together as possible in my final design which should limit the array height to about 31.5" where the prototypes in the photo are at 36".

Last edited by thoriated; 6th October 2010 at 01:15 AM.
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