Recommended Speaker List for Atma-Sphere OTL Amplifiers.

Vandersteen 5 series, Quatro series, Treo's with Sub 3s  have an easy impedance for most any tube or OTL design.
The unique 100  HZ high pass unloads the heavy lifting for the main amp and allows the speakers internal solid state amp to take care of the bass frequencies, in room compensation adjustments takes out your room / placement issues dramatically improving transparency and clarity of the whole system.
JohnnyR
 Vandersteen dealer

..and to pile on a bit, the Vandersteen way preserves the transfer function of the main amplifier, which is part of the point of this thread....

How does Tannoy & atmasphere match up? Especially in the bass department......

Very well is the short answer.

I have used the MA-1s amp with the Vandersteen Treos without subs and they sound great!

Dragon, it all depends on how and what you like to listen to. If you are a rocker and like to play loud than an efficient horn system like those mentioned above would be the way to go. But if you tend to listen to more acoustic instruments, jazz and classical at moderate levels then the mid range purity of a full range ESL would be best. Something like the Sound Labs 545. I am not crazy about ESL-57s because they are just too fragile and in all reality the Sound Labs is a much better all round speaker. It is much better in the mid bass and it's high frequency dispersion is much better as well as being tough as nails. Ralph also insists they match up with his amplifiers beautifully. The 545s are also a lot smaller than the big boys. I believe they are narrower and taller than the ESL-57s and would take up less floor space. They are less sensitive than a horn system and will not go as loud but still 8 watts will get you to 95 dB, a comfortably loud volume and theoretically you could hit 102 db with a 60 Watt amp, louder than most of us listen.