Quote:
Originally Posted by derekbmn 
What the...  
That can't be a good thing.
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It isn't!

Quote:
Originally Posted by wualta 
Hee hee. When I say that about Acoustat's MK-121, people eye me skeptically. For those who want to see for themselves, the Quad ESL's schematic can be found here.
That's quite an endorsement. I hope Charivari is reading this. To what do you attribute this prowess?
Sounds plausible. Where'd you find out about this?
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I know that Quad time aligned the panels and thats why the treble panel is set back a bit.
The reason why they sound this good is simple, the drivers are properly mounted and then they are fixed to a large milled piece of aluminum so they do not resonate much. I modded my Suprex in a similar manner and it completely transformed when from a horrible headphone to a pretty good one. With ESL's the housing has to be very neutral and non resonant so they can project all of the sound they make. Quad is still working on this but Sound Lab and Stax have done well on this issue with the U-1's and the SR-007 respectively.
I've read about this mylar phenomenon from a number of sources and it makes complete sense to my. Mylar is a very strange material to work with and there are always wrinkles, no matter what you do. They might be small but the driver has to clear as much of them by running in for a few hours. People might not be hearing this on production samples because the drivers are measured at the factory so they must run them for a while.
Quote:
Originally Posted by 88Sound 
First of all, thank you very much for all that info. The Tele's I'm running are the real one's, no dimple, double getter, made at the ULM plant in W. Germany. I just purchased a matched quad of Mullard dual getter XF2's, 2 branded as Rogers, and 2 branded as Philips. After I get them and burn them in for a while I'll post impressions of the differences between the XF2's and the Tele's.
Sounds like you may be planning a major overhaul of that Blue Hawaii! I wish you the best of luck. I'm not quite that brave but will be very curious about your results!
Thanks again!
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I hope you'll be pleased with the XF2's. There are no substitutes for me because every thing else sounds wrong.
I want to upgrade the Blue Hawaii but there is really no way to move forward. The ES-1 is IMO the ugliest amp ever made and I'd much rather upgrade the Blue Hawaii as much as possible instead of forking out more then 10k for a custom ES-1.
Quote:
Originally Posted by edstrelow 
This is rather like my opinion of the Sigma pro and for that matter the low bias Sigma and the Sigma rebuilt with 404 components. The 404 rebuild makes a real improvement over the basic pro, in treble and detail. Both are more dynamic than the low bias, but sometimes I like the increased ambience that you get with low bias.
While I have been wrapped in the Sigma/404 for the last several months, the last week or so I have been going back to the basic Lambda 404 run off the Stax 717 amp. An application of Silclear on all contacts (ic's,power plugs,pins) gives the 404's much more oomph and seems to reduce the 404's deficiencies, i.e. treble etch and weak midbass. The sound is much more exciting and even recordings which had been unlistenable on the 404's are sounding pretty good.
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Good to see that you are getting good results with the Silclear. You shoud thy to upgrade the connectors to WBT Nextgen. It is a
huge difference.