AKG K240 Sextett--Grado'd AKG?
Oct 7, 2010 at 8:03 PM Post #466 of 1,737
You should be able to find someone, good luck.  
 
As for the posts above yours by palindrom, don't bother with velour pads for the Sextetts, it sound really bad.  Unless you have plans to modify the velours somehow.  I imagine the right ventilation holes or other mods could get them sounding good, but otherwise it's really not worth it. 
 
Oct 16, 2010 at 12:42 AM Post #467 of 1,737

Just finished restoring and recabling a pair, silver coated copper in cotton sleeveing, 4 conductors in case someone wanted to make them balanced in the future. Also replaced the inner wiring of the right side. new foams, disk, grillcloth, elastics. I think I am going to go unamped though, I travel too often. So these are for sale along with my shanling ph 300
 
Oct 16, 2010 at 10:24 AM Post #469 of 1,737
cotton sleeveing courtesy of Head-fi user Steve Eddy. They look a little more creamy in real life, green tint is caused by a led bulb I'm trying out, these were straight out of the camera, didn't want to spend time manipulating.
 
Oct 18, 2010 at 6:52 PM Post #470 of 1,737
Quote:
You should be able to find someone, good luck.  
 
As for the posts above yours by palindrom, don't bother with velour pads for the Sextetts, it sound really bad.  Unless you have plans to modify the velours somehow.  I imagine the right ventilation holes or other mods could get them sounding good, but otherwise it's really not worth it. 


Well, it worked for me
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Maybe I'll show what kept me busy for last 3 hours. Starting point:
 

 
Of course elastic bands were long dead. Cardan was loose (foam decomposed) and squeaky. The smell was awful. I really hate cigarette smoke.
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Maybe it doesn't look so obvious, but earpads were flat. Headband got strange shape, probably because of hanging HP on something
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So I contacted AKG dealer in my country and...
 

 
got velour earpads, original rubber bands, 4xfoam and mini-XLR. Maybe in future I'll consider a little upgrade, but for now I'm staying with vintage Sextetts.
If adm allow, I'll show some HP pornography
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Dismantling...
 

 
I've cleaned every single part using brushes, clothes and alcohol. Plastic parts went swimming in detergent.
 

 
I managed to take off only one grille. Plastic was broken there.
 

 
All elements in excellent condition. Beautiful!
 
What was done:
- Deep cleaning
- New elastics
- New foam
- New earpads
- Grilles bonded in few points with elastic polymer glue
- Cardan cleaned on joints and lubricated with small amount of dense silicon+Teflon grease
- Aluminum elements polished and glued with polymer glue
- Head strap ironed (carefully through cloth 
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)
 
I didn't recable them. Original cable is good enough for me.
 
This is how they look now:
 

 

 
As new. Try to find headphones of that quality today
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It's a shame I can't post sound sample
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PS
sorry for long-ish post.
 
Oct 18, 2010 at 9:31 PM Post #472 of 1,737
holy moly!  Those are gorgeous!  NIce pictures too.  I would definitely recommend at least trying them with brand new pleather pads.  I know, they're not as comfortable, but they weren't voiced for velour, and they sound really muffled with velour IMO.  Might be worth trying, since your last pleathers were flat and so wouldn't have sounded good. 
 
Oct 19, 2010 at 1:51 AM Post #473 of 1,737
 
Quote:
oh, I shouldve done that to my headband as well, good idea.


I don't know what was exact temperature, but below 100°C. Moisten, folded cloth and patience
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Quote:
holy moly!  Those are gorgeous!  NIce pictures too.  I would definitely recommend at least trying them with brand new pleather pads.  I know, they're not as comfortable, but they weren't voiced for velour, and they sound really muffled with velour IMO.  Might be worth trying, since your last pleathers were flat and so wouldn't have sounded good. 


Thank you
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Actually I could buy pleathers for try as they're relatively cheap. Thanks for the hint!
 
And now it's time to build custom SS amp and DAC for them I designed few months ago. Can't wait to hear their full potential as sound quality really freaks me out on my oldschool amplituner (which have DIN headphone socket BTW)
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(source: http://www.radmory.za.pl/5102te.html)
 
Oct 20, 2010 at 10:49 AM Post #475 of 1,737
 
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I just purchased the above headphones from AudioNoob.  They come in tomorrow and I cannot wait!!! I've been slobbering all over this thread since I ordered them, but the anticipation is killing me.  I'm going to be running them out of a Darkvoice 337 so I should have plenty of power.  Is there any way I can hook them right up to my speaker amp?  It's an altec 2020 pentode amp with vintage western electric transformers, only puts out ten watts but the "torque" the thing produces is huge.  Feel that like the Almarro (from the first page of the thread) this would be the perfect match for the headphones.  
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Oct 20, 2010 at 2:28 PM Post #476 of 1,737
(posted in wrong thread by mistake)
 
Oct 25, 2010 at 5:02 AM Post #477 of 1,737
I don't have experience with that specific amp, but I'm designing solid state amp to drive AKG's. Knowing the impedance and desired maximal power you get minimal needed voltage.
Fore instance, I assumed 200 mW to generate acoustic pressure within pain level.
u²=PZ --> .2W · 600Ω ≈ 11V
So you need at least 22V peak-to-peak or symmetrical 11V. I used 15V to have enough spare power (lower THD).
Having high impedance headphones is nice because you don't care about current noise and in some range also voltage noise. If your amp doesn't mind high impedance and thus high amplitude, it will fly.
 
Oct 26, 2010 at 1:17 AM Post #479 of 1,737
Have you ever tried it?  When i've taken the Sextetts to meets, they wind up being one of my favorites and I'm blown away by them, but then when I bring them home their weaknesses always become more apparent.  So it's either the background noise at the meets, or the power and quality sources they get there.  Or both I guess
 
Oct 26, 2010 at 2:42 AM Post #480 of 1,737
It may be a combination of power and source. I find that they do scale very well with both. I've tried them on some very expensive amps, and each time they improved. In fact I considered selling my balanced bijou once, but after listening to pair of sextetts balanced, I decided at least for no other reason than driving sextetts that I would keep it.
 

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