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RE: Analog only

That tilt control sounds like a great idea. The ear is tolerant of that sort of gradual change. What it doesn't seem to like is mismatched attempts at precision EQ, e.g., with a 10 band equalizer or a parametric. Some of this may have to do with the sonic characteristics of the circuit, and some may have to do with curves that aren't minimum phase. But trying to fix peaks and dips with a 10 band always seems to degrade the sound, you need at least a 1/3 octave EQ and even then it's chancy. You can EQ the room to within +/- 1 dB, but it doesn't sound natural. More sophisticated digital equalizers like DEQX, on the other hand, can work wonders and I'm looking forward to playing with Thuneau Allocator.

I'd say that the EQ in the DCX2496 can indeed work wonders in the bass. It just isn't possible to get a smooth bass response in a small room without some very serious room treatment, most good speakers are fairly reasonable in the mids and highs but below 200 Hz you're always going to be stuck with very audible peaks and dips. I don't know if they can run enough filters in the DCX to properly equalize the treble, people tend not to use it there because it doesn't sound as good in the highs as it does in the lows.

There's also an interesting little bass-only equalizer that someone makes for about $350, I think it has automatic EQ. Don't remember what it's called but it was reviewed in a recent Stereophile. You could get one of those and dispense with the measurement mic, although you'd lose the ability to tailor the mids and highs later on, except by ear. Also, a frequency display is invaluable for matching subwoofer levels, you can try to do it with tones or music but it's a fairly frustrating business, among other things, the Fletcher-Munson effect means that the ear's sensitivity to bass is strongly dependent on how loud the music is.

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