Originally Posted by gurus
The output of bass in the BEV's was anemic at the best as the SPL level just did not do it. But it was the cleanest (transparent) sounding ESL out there.
I heard them at a store that later had DW develop a speaker line for them and the dealer then dropped the Beveridge line.
You certainly could put it that way. 2SW, which was and still is the best Bev ever to reach anything approaching widespread use, was limited in bass and did have its issues with subwoofer.
DW ( Dayton Wright ) was/is a very capable firm, unfortunately never heard any of their products.
Fast forward to present day - Bev One should be capable of reasonable SPLs in bass - with unheard of precision. And if you really require bass non plus ultra, there is always Eminent Technology rotary sub woofer - which no other technology can match. Together, they should make up the ultimate speaker system. If properly mounted/positioned/adjusted. Not likely to happen for me in this lifetime, I am afraid. Compared to the sum of money required to assemble such a system, ANY headphone is a very inexpensive way out. And if you do not have dedicated listening room, far more rational decision - what good is a speaker that is let down by the room it is positioned in ?
Bev has for an ESL very unusual placement requirements, that usually go in its favour. They are positioned against the wall, preferably the longer one of the room - not away from anything as usually required by dipole radiators, which is 99% of all ESLs. Can play also in small(ish) rooms - with the exception of Quad 63, any large(r) ESL requires BIG room (>50 m square) in order to start to sing. It was amusing but not funny to hear Acoustat Monitor ( larger version of the original Acoustat X with one additional panel and same high voltage tube amp ) first in BIG room ( georgeus ) and then in
normal sized smaller room - funeral. Due to lack of such big room, I dropped ESLs (and other full range dipoles) as potential candidates, but Bev is another story. Who knows, perhaps one day...
Since this is a Stax thread - I only saw Stax ESLs at fair, never got to hear them. They were unpopular due to even for ESL very low efficiency and hence requirement for high quality high powered amps = read very expensive, even in ESL arena.. But those who did hear this combo all said they were/are up with the best - if your listening levels are moderate.
Stax was unique in approach to polarizing voltage or bias - BB suffix meant this was done by batteries ( like several kilovolts for speakers, requiring say 1500 pcs of 3 V cell batteries per speaker ... ) and not usual voltage multiplier circuit that has high ripple and can only be used because of large RC constant ESLs are usually built with. If anyone has first hand experience about sonics of normal powered and battery powered bias of otherwise same Stax model, be it speaker or headphone, please comment.