Blumlein laid out a lot of the fundamentals of stereo recording decades ago. He seems pretty spot-on; the closer one adheres to the basic principles, it seems, the better the sound.
I guess I still have to be convinced about the QOL.
With regards to the X-DREI, some equipment will benefit and others will not. I suspect this will have a more dramatic effect on solid state amplifiers, as RF switching is a bane of such amps, and something that could limit that might be really helpful if the amp has that sort of bandwidth to begin with. Tubes don't have switching issues so I suspect the X-DREI will have less effect on them, but its just a guess, the proof would be to give it a listen.
I guess I still have to be convinced about the QOL.
With regards to the X-DREI, some equipment will benefit and others will not. I suspect this will have a more dramatic effect on solid state amplifiers, as RF switching is a bane of such amps, and something that could limit that might be really helpful if the amp has that sort of bandwidth to begin with. Tubes don't have switching issues so I suspect the X-DREI will have less effect on them, but its just a guess, the proof would be to give it a listen.