ESS speakers synergise with valves?


I recently bought a pair of old ESS PS5C speakers.These use a small Heil Ribbon,a ten inch mid woofer and a rear mounted ten inch passive radiator.
I started out using some of my SS amps amps with these and whilst I could hear that they were doing some things really well,felt that a hollow and slightly coarse midrange detracted from their overall sound.They had a typical 'west coast" sound,although infinitely better sounding than their JBL contemporaries.
To combat this I doped the woofer with liquid silicone.This is often a subtle but very effective way of reducing paper cone colourations.
The next day I changed amps to 23 watt EL34 Trimax monoblocks,never really expecting them to drive them properly.But was I ever wrong!
The sound from this combination is simply amazing.These are now incredibly neutral sounding speakers,with fantastic bass,clarity and imaging.
Anybody who has been using valve amps for a while comes to know that they very rarely achieve their potential with mainstream speakers.So when we discover one that is the exception to the rule we need to announce it.These ESS may not to be to everyones liking-they are quite analytical,but on balance I think they are still a real find for tube lovers.With a 300b SET amp they could really be something.
Just to confirm the ease of driving I have also run them with a Tripath 10 watt class T amp.Not as good as the valves but still drives them quite loud before clipping and sounds better than SS.

Has anyone else discovered these?
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I have an old pair of ESS speakers that I have had since 1971 I re did the surround on the woofer a few years ago and they are still playing every day. These speakers really sound good whith a Bottlehead foreplay tube pre amp and a solid state amp.
Yes I too, Have a pair of ESS AMT (Model 5) and just this last week pulled them out of the garage to find that all surrounds on the 10" woofers and 10" passive radiators were non-existent....so I bought two new OME 10" woofers with 125 RMS handling and bought two new OME passive radiators and of course I had to rubber cement them to the existing octagon shaped aluminum frame and them remount them in the back of the cabinets... ESS put alot of science into their sound from what I can hear...loud, quiet...either way they are crystal clear and very responsive no matter how much power they are running on...20, 30 or even 90 watts...these have got to have the biggest boom for the smallest power consumption over all and usually that is the goal when a passive radiator is present in the cabinet(setup)......Now some trivia questions that I would like answers to: What year did the ESS Performance Series (Model 5) come out? How much money did a pair of these speakers cost when they first hit the shelves? Was ESS top-of-the-line for its time? Why did ESS shut down (go out of business)-(in Southern California?) Thank for for you interest in ESS VINTAGE AUDIO as much as I am -- Dave
I have 35+ year old PS-8A's which I've been meaning to revitalize again. The woofers are shot but the passive radiators had been replaced awhile back. The Heil air motion transformers look OK but we'll see (why shouldn't they be?) I have a Fischer 500c receiver that I'd like to run into them that I'm thinking would probably be an interesting match. The original Technics 45 watt per channel receiver which I bought new in 1972 and used with them is still in use everyday at my mother's [no servicing ever done to it]. Can anyone tell me specifically where I can get these woofers replaced ? I know there was a place where you can send the baskets and they rebuild the rest of it again, but I lost that site. Any ideas? These were definitely ahead of their time speakers "Sound as clear as light" was a fitting moniker. Regards
ATTN: LISSNR - - Yes!! As you read above, I just rebuilt my ESS Tempest LS-5's with two new 10" woofers and two new 10" passive radiators... I was chatting with Eric from Orange County Speaker (and repair) Inc. and I asked him what woofer would best replace and be most compatible with the existing ESS enclosure and passive radiator system...he gave me a link within the Orange County Speaker website and he said they carry, without a doubt, the best match woofer that complies with the Vintage ESS woofer. These have a paper cone, foam surround, 8 ohm, 2 inch voice coil, 175 watts RMS and a frequency response of 23hz - 3.5khz...and from what I can tell they even look like the original ESS Tempest Woofers...the brand name of these are Eminence for a well worth cost of $69.95 each. The website for Orange County Speaker is: www.speakerrepair.com and the keyword is 10 inch Eminence 1040SF Woofer... Ok, there's that info, now onto woofer surround (foam) repair kits and replacement passive radiators...Orange County Speaker also sells those as well. Hope this helps Lissnr... Let me know! And yes, mine now also, finally have--"Sound As Clear As Light" -dave
Thanks Dave, I've now put that site on my favorites list and I'll be picking up those woofers soon. I may have to call to speak with them about the passive radiators though. Thanks for the insight!