Thanks Jazzfan and Jlejle for the brilliant observation on released limitations of using the Realiser with this PRIR, very true indeed and observed the same thing (although you'd be surprised with the amp pairing the output that can be created with the system, but the issue is the room starts to get in the way, whereas in the headphones it remains linear to the measurements at the lower volume).
So the room has a real impact on these things. the versions of quads that I have fire both front and back, which is why I have eggshell foam and sound panels behind them, but each speaker does have a different effect in the room given a couple particulars. Left of the listening location has a pillar (and windows which are reflective), on the right is a hallway opening, and I'm sitting in the middle of the room. Bass of course changes dramatically as I move around the room, and the HF's do too. You'll get a kick out of the difference when I put a PRIR when sitting back only 1 foot and lowering my head by one foot. When listening, I actively position my head and chair until it's optimal. I need to do the same thing just before measurements based upon music to catch the same sweet spot. The out of phase comment is interesting. It's definitely connected accurately, but of course can't rule out an internal wiring phase issue (whether at time of manufacture or at the point of restoration). I will admit the dispersion of the sound does suggest a phase issue worth looking into. I'll experiment be changing the +/- at the speaker and see how it sounds. Another experiment I may try is to add the 2nd pair of Quads I have in a T-shape behind the current pair. While mentally this seems like a strange approach, I've heard from multiple Quad nuts that this can produce significantly extended bass and HF, although I don't know if my room will support it. Fun experiment though.
Thanks again for the suggestions and will give the 5/7 channel a go as well.
Wow, what a sound comes with QUAD speakers!!! Better than all what I've heard before with Realiser!
Brightness, localisation, transparency are unbelievable!
I looked quickly into my measuring system: PRIR is out of phase (complete), but it is not a problem, it's electrostatic, I think.
Right speaker have a little different . frequency spectrum, a noticeable frequency fall-off between 14-17 kHz. A bass accentuation at L62/R55 Hz +10dB should be room resonance effect, have a look at this. S/N L81/R32dB is very good at this recording level.
The auditions I've made with master recordings in 96kHz with jazz/classical bass, cello, percussions and drums at very high levels (jazzfan you are so right!!!) are breathtaking (no way with electrostatic normally)!!!
Please, make a 5 and 7 channel setup, if possible. Thanks.