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Old 18th April 2011, 10:17 AM   #101
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Lovely speakers, a job well done!
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Old 18th April 2011, 10:46 AM   #102
SM7UYJ is offline SM7UYJ  Sweden
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Thank you all for the kind words!

I have only been able to play in stereo for a day and the filter is a first version - but I'm very pleased with the sound!

When listening to other systems I have mostly reflected on the "boomy" bass compared to my hybrids.

I'm sure it's because I've been listening to dipole bass for years and have trouble with boxed systems.

When I compare my new panels to my hybrids - the hybrids now sound boxed!

Roger
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Old 18th April 2011, 11:41 AM   #103
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That is exactly my thought when I first heard my Apogee's and got used to them.I kringe when i'm forced to listen to a box anymore.Although my bass system is not bad at the moment with 2-12's, 4-10's and 2-8's for subsand flat from 15hz to 1000hz.I am working out some 4 foot esl's for the rest of the range for this years project.But I can't wait till I at least get my little panels hooked back up for the time being. jer

Last edited by geraldfryjr; 18th April 2011 at 11:48 AM.
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Old 18th April 2011, 11:47 AM   #104
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I don't what's up with my post as it is supposed to be a space in between each sentence. jer
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Old 18th April 2011, 11:50 AM   #105
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even editing would not work. jer
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Old 18th April 2011, 02:35 PM   #106
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Hi Roger,

I know exactly what you mean. I bought a pair of used Martin Logan Aerius a few months ago just wanting to compare the sound with my full range ESL. I found the sound of ML to be very boxy, and I didn't like it. They are now just sitting in my listening room gathering dust.

Wachara C.
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Old 27th April 2011, 08:34 AM   #107
SM7UYJ is offline SM7UYJ  Sweden
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After some listening and aligning the speakers more serious - there was trouble, -The sound stage tilted to the right !

I put on some pink noice and took a SPL measurement.
The right speaker was 3-4dB louder - not good!

To try and find the fault, I got my selfwound transformer and hooked it up seperatly to the right and then to my left panel - still 3-4dB difference!

Well, well - I'll just have to rebuild the panels in my left speaker ( this speaker was the first to be compleated and had been used to test trafos, EHTs, filters etc) -do again, do right!

Spent a half day with lamp oil peeling the panels apart and getting the foamtape off the PVC-spacers.

( Wachara: -The tape sticks like .......to PVC! )

Cleaned everything a couple off times, put on new tape and new Mylar.

With fresh panels mounted in the frames I fired upp the speakers again.

-The soundstage is still tilted to the right!

I was very confused, but the engeneer in me said that there must be a logical reason for the difference in output - and it's probably not in the panels!?

And it was'nt!

Quoting my footer, there must have been many people watching!

When you test ESL panels - test them with EXACTLY the same gear!

I used the same audio trafo as I suspected the problem to be there, but used the EHT mounted in the speaker!

I had managed to kill two diods in my left EHT-unit => the bias was abt. 600V lower on this side!

I fixed the EHT-unit and the soundstage is back to normal!


Next up is to get the XO optimized - Should I change my footer just in case?

Roger
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Old 27th April 2011, 11:32 AM   #108
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so what is the cost breakdown? Very nice stuff man.
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Old 27th April 2011, 01:42 PM   #109
SM7UYJ is offline SM7UYJ  Sweden
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Quote:
Originally Posted by digits View Post
so what is the cost breakdown?
Panels

Steel for stators: $185
Powdercoating stators: $100
Mylar 2m and 6m : $60
Aluminumfoil, glue etc: $50
MT-Audio coating: $10
Foam tape 1mm : $75

Frames

19mm MDF : $50
16mm MDF : $40
Black paint: $75
Stainless steel screws: $20
Rubber window seals: $20
Silicone: $10
3mm black Plexi: $150

Electronics

8 pcs 12V/240V toroids: $350
4 pcs ignition trafos: $50
2 x EHT : $100

Other

Ac filter, plug, aluminum sheet : $150

Total: $1495

Toroids, electronics and some of the other stuff I already had on my shelves, so they did not cost me.

Roger
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Old 27th April 2011, 03:02 PM   #110
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็Hi Roger,

The imbalance happens to me once. It turns out to be that my panels are very leaky and I have to redo everything.

How did you manage to burnt your diodes and still have voltage on the output?

Wachara C.
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