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Old 11th October 2012, 08:00 PM   #351
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Quote:
Originally Posted by MrAcoustat View Post
Hi Frommerstop, first you need an 8 inch panel the Spectra panel is 9 inch that's one thing there are other issues you are in for lot's of work send me your e-mail and i will put you in contact with someone that can help you. André

mracoustat@videotro.ca
Thanks for the heads up, but I had already considered that. I'm just playing around with some extra speakers here, and making a more solid frame is one of the things I was expecting. I'm actually thinking I may make the frames out of wood, but sized to fit a pair of Arcici ESL-63 stands. Making them an inch wider than stock won't be an issue.
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Old 11th October 2012, 08:04 PM   #352
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Originally Posted by hella356 View Post
There is a single 8" panel on ebay:

Acoustat 8" Panel Works Good! | eBay
Thanks!
I saw that a few days ago, and I've been watching it. One of the reasons for posting this question now, was to see if my "Frankenspeakers" idea would work... if the consensus is it's nuts, then I'll probably try & win that panel, and just make the 3s whole again.
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Old 11th October 2012, 09:06 PM   #353
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Quote:
Originally Posted by Frommerstop View Post
Thanks!
I saw that a few days ago, and I've been watching it. One of the reasons for posting this question now, was to see if my "Frankenspeakers" idea would work... if the consensus is it's nuts, then I'll probably try & win that panel, and just make the 3s whole again.
If you can pick up that 8" panel, you'll have both options open to you...good luck!
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Old 11th October 2012, 09:09 PM   #354
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Quote:
Originally Posted by Frommerstop View Post
Yes, that's pretty much it. I'm suggesting using the lowpass out to feed the Model 3s controller. I didn't think it would require a modification of the Spectra's crossover though, because it's already designed to drive a dynamic load - presumably 4-8 ohm, that the cone woofer would need. Please correct me if I'm wrong, but I figured it was most likely a pretty straight signal (below 350hz or so) from the source amplifier to that woofer, so how would it be different than just running the signal straight from the amp to the 3s? I suppose, I could just bi-amp them with an outboard active crossover to spit the 11s from the 3s, but it seems, in my limited crossover experience, like it would work using the passive Acoustat components.
A passive crossover does not exist by itself, and its operation is designed around the load it is to drive. So by changing the load from a woofer (with its own impedance and frequency response curves) to a transformer interface (with different impedance and frequency characteristics) the operation of the crossover will almost certainly change (of course, never for the better!) So be prepared for lots of trial-n-error listening and crossover value adjustment.

I have always been amazed at the pre-made commercial crossovers available that are designed for "4-ohm" or "8-ohm" speakers. Anyone who has ever dabbled in passive crossover design will know that crossovers always need to be tailored to the specific drivers in the system, so how anyone can make a pre-made crossover is beyond me. Those products are certainly not for the type of serious folks who hang around these forums. Ok, I'll get off my soap box now, as I am in danger of getting off-topic.
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Old 13th October 2012, 10:51 AM   #355
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After a bit of experimentation with active crossovers and double panels, I decided to take the easy way out and upgrade my Spectra 11 interfaces with Mundorf MKP caps. Holy crap! I expected the sound to improve a bit, but this is like listening to a different speaker altogether. The highs are much more extended and have a LOT more detail. I hear new things in all my music, this will be an interesting journey to say the least. These speakers just continue to amaze me

I attach some before and after pictures of the upgrade. As you can see the interface was already modified (by some other guy), new speaker and power input connections was installed directly on the interface and the low pass filter was removed and placed in the woofer box (I can't understand why Acoustat didn't chose this solution in the first place, it's much cleaner and better sounding).
Attached Images
File Type: jpg 20121013_105410.jpg (702.1 KB, 204 views)
File Type: jpg 20121013_105625.jpg (297.5 KB, 190 views)
File Type: jpg 20121013_111512.jpg (657.5 KB, 191 views)

Last edited by phazer99; 13th October 2012 at 10:54 AM.
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Old 15th October 2012, 06:58 PM   #356
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Originally Posted by phazer99 View Post
...(I can't understand why Acoustat didn't chose this solution in the first place, it's much cleaner and better sounding).
That upgrade is pretty popular and well worth the trouble and expense. As to why it was not done by the factory...the answer is the almightly dollar. The Spectra 11 was originally targeted to sell for under $1000, and getting the materials cost to that point didn't allow some of the nicer frills. Even the Spectra 1100, which was an upgraded version of the Spectra 11, did not use fim capacitors. Besides, Acoustat needed to leave something for the DIY'ers to do!
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Old 15th October 2012, 08:29 PM   #357
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QUOTE:
Originally Posted by phazer99 Click the image to open in full size.
...(I can't understand why Acoustat didn't chose this solution in the first place, it's much cleaner and better sounding).

Easy just like Andy said the mighty dollar my Acoustat's cost me $600.00 before mods i am now up to $3,000.00 and i'm very happy because all the work was done by my best FRIEND at minimal cost two weeks ago i attended the T.A.V.E.S. 2012 show in Toronto and one of the speakers that i fell in love with was the Audio Exklusiv P3.1 electrostatic and even at $16,000.00 i still prefer my modified 1+1s here are pictures of my modified interface & panel just to give you an idea of the work involved all this in a 2x3 steel frame.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
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Last edited by MrAcoustat; 15th October 2012 at 08:31 PM.
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Old 15th October 2012, 08:45 PM   #358
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Looks nice. My cap upgrade cost about $85 and I bought the speakers for $375, so $460 for the best sounding speakers I've heard.

I think I'll upgrade the interfaces of the Spectra 11's I use for rear channels as well.
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Old 15th October 2012, 09:09 PM   #359
tyu is offline tyu  United States
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I did this mod to my panels years back.....just be eze...you can divied any of the panels if you wont..eze...Or
Short all wires... top an bottem...front an back
This panel setup give 2db more out put over the one end feed i have found...thanks for the pic i have lost my pic....goodluck
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File Type: jpg PanneauAcoustatavecttesrelies[1].jpg (58.9 KB, 67 views)
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Old 15th October 2012, 11:18 PM   #360
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Nice work on those 1+1s!
But what's the reasoning behind putting the "wall wart" inside to box?
Seems that negates the noise isolation advantage of getting the AC as far from the signal as possible. Also, I don't understand the last picture. What is the advantage in soldering "bridges" over the looped wire?
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