Greg, my Summits are crossed to the subwoofer @ 77Hz i.e. they're acting like P's hypothetical 2-way monitors, even if they're 2-way floor-standing. What "size" issue do I have?
Keep it clean, now! ;-)
First of all let me say I've always been a fan of satellite systems. M&K manufactured excellent examples of such a system. It deals with so many problems like cabinet resonance, room space, WAF and price. A now defunct dealer I know was an almost exclusive dealer of Pro ac speakers and the Janis sub system. I am sure you all remember the pro ac Tablette. There was also a super system with the Decca ribbon tweeter, the Quad 57 for midrange, and the Hartley subs. So there is nothing new here.
I don't think electrostatics make a good example here. A dynamic mini-monitor has a fairly small box and can go down to around 60 hz. Although many manufactures cheat and use an artificial rise at 60hz to create the impression of more bass.
I'm not qualified to to do a complicated speaker design discussion.
However the the laws of physics dictate that size matters. I am a huge Martin Logan fan.
One of the reasons I have not switched from CLS to to one of there excellent hybrids is because I believe the panels are to small. (Uh Oh! i'm in trouble now.) Yeah I know all about the about micro perforations. All I've seen on that is marketing copy. If anybody has a white paper on the issue I'd like to see it. Many agree with with me that the woofer takes over to early and creates a discontinuity. This argument has been around since the introduction of the Sequel.
On the issue of size, take two examples from the Martin Logan lineup. You can access complete specs at
www.martinlogan.com. I don't consider these subs I consider them woofers. In my day a true sub was flat from 20-30 hz. Neither of these are. A true sub would not go higher than 100hz.
Back to the point. We can see that the Summit X even with its' much larger than the Source panel, crosses over at 270hz. The Source crosses over at 470hz. The reason they crossover so high is because those small panels can't do bass. My CLS and the CLX go down to 56hz. We can easily see that CLS pane lis significantly larger than the Summit X and The Source. The CLX is larger still. While they CLX and CLS have similar frequency response the larger CLX panel results in a much greater dynamic range.
If we transfer over to Soundlab we can see an either greater utilization of size as you move up the model lineup.
P.S. I should point out that the WATT started out as an average speaker. I guarantee if anybody had made it besides Dave Wilson, it would have languished in obscurity.