Ggavetti,
I have Duke's Planetarium Beta system. The SWARM subs are superb, and I believe they would be a great match for your 57s. Pitch definition is really quite extraordinary. The sub units themselves are quite small, with an 11" X 11" footprint (each). And just so you're aware, the last speakers I owned were SoundLab A-1PX and have owned ESL-63s previously.
Mrtennis,
I also thought that I never would be happy with anything other than a panel sub. The SWARM changed my mind.
I have Duke's Planetarium Beta system. The SWARM subs are superb, and I believe they would be a great match for your 57s. Pitch definition is really quite extraordinary. The sub units themselves are quite small, with an 11" X 11" footprint (each). And just so you're aware, the last speakers I owned were SoundLab A-1PX and have owned ESL-63s previously.
Mrtennis,
I also thought that I never would be happy with anything other than a panel sub. The SWARM changed my mind.