Acoustic Suspension sound in 2020?

Dear @aainpb : Not from the 70's but I own and am the original owner of a marvelous ADS L2030 ( heavy tweaked by me, you can read here:  https://systems.audiogon.com/systems/3080 ).

Those are acoustic suspension  and exist other two models: the L1230 and the L1530. This one along the 2030 were used as speaker monitors by Telarc recordings.

Even today my speakers are a true challenge for almost any speaker. Those ( especially. ) main silk made midrange and tweeter drivers are just extraordinary by any today standards.

https://gear.discogs.com/gear/68646-ads-l2030

this is a restored pair not tweaked ones:

https://audiokarma.org/forums/index.php?threads/ads-l2030-restoration.801968/

http://sportsbil.com/ads/l-2030-brochure.pdf


Why today exist only a few acoustic suspension speakers design? I really don't know.

Btw, M.Kelly was the ADS L2030 designer whom years latter founded Aerial Acoustic speakers and his today designs are not acoustic suspension but ported one:  ? ¡ ? ¡ ?

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

Vandersteen 2s and 1s are sealed-box enclosures, no? If no ports, therefore acoustic suspension, unless I misunderstand the definition. There is also an interview with RV in which he cites his inspiration from the sound of the acoustic-suspension designs of Acoustic Research, etc., -- the "New England sound" I think he called it -- when he designed the Model 2.

The 1 has a transmission line vent and the Model 2 has what essentially functions as a passive radiator, and passive radiators act similarly to ports. Both speakers lack temporal snap in the bass which is the hallmark of a good AS design. 

Helomech, the acoustic coupler in the 2 and 3 is an active driver. Wondering if you know any technical details re how it essentially functions as a PR.

Would never, ever think that the bass in the 3 lacks snap, but of course that’s subjective and perhaps amp related.

Helomech, the acoustic coupler in the 2 and 3 is an active driver. Wondering if you know any technical details re how it essentially functions as a PR.

Would never, ever think that the bass in the 3 lacks snap, but of course that’s subjective and perhaps amp related

Look at the measurements of the 2Ce Sigs in Stereophile, it does indeed behave more like a PR.  

The whole series is somewhat lacking dynamics and bass texture. Not amp related as I've used the same amps on many other speakers of similar load difficulty. They dig plenty deep in the bass, with plenty of output, but it's not the tightly-controlled bass of true AS. 

Thanks. The impedance charts i suppose imply a hybrid. Not 100%  clear but I appreciate the info.