I am going to run against the current here and lend a voice in favor of the EQ. I have several in my system. The key (provided the EQ does not add too much noise or distortion) is to limit your adjustments to very subtle attenuations. FWIW, a very well known speaker designer once remarked to me that he thought nothing was wrong with having and using tone controls. An EQ is little more than a sophisticated set of tone controls (if designed well). I also suggest a configuration that allows the removal of the EQ from the signal chain at the press of a button (e.g., connect it through a tape loop). FWIW, your EQ adjustments do not imply (at least to me) typical room acoustic issues.
That said, I think your most important task is to determine just which part of your rig is now the weak link. Borrow another pair of speakers, an amp, preamp or source component and see what happens.
While a subwoofer (with a hi-pass/lo-pass filter) will relieve the ADSes of the need to reproduce deep bass, a poorly designed crossover might cause more problems than it solves. I use a pair of Vandersteen 2Wq subs. While they require your mains to have useable response down to 40Hz, they use an unusual crossover scheme that promotes a clean, seemless blend with the mains. You can read more at www.vandersteen.com.
I have no personal experience with Adcom power amps, but everything I've read about them over the years suggests to me that they are very powerful, but not the last word in refinement. The Adcom preamps seem to be much better regarded. If you want to stick with solid state amps, consider amps by Arcam, Odyssey Audio, McIntosh, Classe, Monarchy Audio and others.
Based on your requirements, I can't recommend a speaker (I don't think I've ever heard your ADS speakers), but you'll need one that can output high SPLs, which means you should consider horn-loaded designs and probably avoid most ribbon-based and planar designs.
That said, I think your most important task is to determine just which part of your rig is now the weak link. Borrow another pair of speakers, an amp, preamp or source component and see what happens.
While a subwoofer (with a hi-pass/lo-pass filter) will relieve the ADSes of the need to reproduce deep bass, a poorly designed crossover might cause more problems than it solves. I use a pair of Vandersteen 2Wq subs. While they require your mains to have useable response down to 40Hz, they use an unusual crossover scheme that promotes a clean, seemless blend with the mains. You can read more at www.vandersteen.com.
I have no personal experience with Adcom power amps, but everything I've read about them over the years suggests to me that they are very powerful, but not the last word in refinement. The Adcom preamps seem to be much better regarded. If you want to stick with solid state amps, consider amps by Arcam, Odyssey Audio, McIntosh, Classe, Monarchy Audio and others.
Based on your requirements, I can't recommend a speaker (I don't think I've ever heard your ADS speakers), but you'll need one that can output high SPLs, which means you should consider horn-loaded designs and probably avoid most ribbon-based and planar designs.
