Originally Posted by noah katz
Were you also unable to get a smooth freq response?
If you were, could you elaborate on what didn't sound right?
The short answer is, "yes, but."
The "but" being that at the time I didn't understand how pointless single-point measurements of the bass were. So I was able to get a pretty graph on the SMS-1 with the mic at about the middle of my head at the primary listening position. I suspect the real response was quite a bit different, though. I did not know enough at the time, nor did I have the right gear, to take a spatially-averaged measurement. I suspect that had I moved the microphone a little, response would've been drastically different.
As for the sonic flaws, the big one I noted was simply that the system sounded disjointed. The bass was there, but it seemed only loosely related to the sounds above it. Keep in mind that I hadn't yet abandoned flawed notions that subs should only be run from 80Hz down, and so on. So one could easily argue that I have a half-cocked notion based on inadequate knowledge and optimization.
I'm not saying it's impossible to effect a solid integration with mains having a 4th order rolloff down low and unloading below resonance. Just that I've not been able to do it. Nor, since I learned more about measurements, have I really tried. Haven't had a need, and efficient sealed mains with relatively high anechoic rolloffs run wideband coupled with multisubs up to 150Hz or thereabouts give me all of the quality and quantity of bass I desire. Though I suppose my vented Aura NS15 + 2x sealed Aura NS12-794 + sealed high-mounted Aura NS10-794 bass setup + 12" Duals run wideband would be considered way too low in volume displacement for many here. After all, there's not a single 18, let alone 4+ of them!
Originally Posted by jeno
I haven't seen other manufacturers worry as much about phase issues as Danley. If steep rolloff below fc may cause a problem, I am certain they've got a way to fix it. Take a look at the larger Synergy horns, the SH64 and SH96. I think they have only single entry ports for the woofers and are having close to a nice 2nd order rolloff.
The bigger ones have 4th order bandpass cabinets for the lower drivers? Interesting. That leads me to suspect that the 6th order BP's in the SM60F/SM69F are a compromise to get the size/weight and price more reasonable. And probably one that works very well for their intended markets. Which, remember, are overwhelmingly not us. But for many of us, an SM69M kit would be a helluva building block, hint hint.