As a long time fan of music that's poorly recorded (Todd Rundgren, anyone?), I've faced this question, too, and I think that this animal exists.
I'd look for a gentle mid bass elevation and slowly, smoothly falling FR thru to the highest frequencies. As noted above, it's hard to predict exactly which speaker might do that in your particular room, but IME it's a fair bet that Verity's Parsifal series will do a pretty good job of it. It's also remarkably resolving thru the mid-band. Unless the gentle 40hz -60hz (ish) bump gets goosed by the room, the P/E will generally sound very good with mediocre source material and wonderful when a good recording allows.
Strictly speaking, it's not the last word in neutrality, but it might be just what you're looking for.
Good Luck,
Marty
I'd look for a gentle mid bass elevation and slowly, smoothly falling FR thru to the highest frequencies. As noted above, it's hard to predict exactly which speaker might do that in your particular room, but IME it's a fair bet that Verity's Parsifal series will do a pretty good job of it. It's also remarkably resolving thru the mid-band. Unless the gentle 40hz -60hz (ish) bump gets goosed by the room, the P/E will generally sound very good with mediocre source material and wonderful when a good recording allows.
Strictly speaking, it's not the last word in neutrality, but it might be just what you're looking for.
Good Luck,
Marty