PaulDA
Senior HTF Member
I can only speak for myself, of course, but on my current setup, the difference between SACD and CD has been like the difference between a well recorded cassette tape, in the first few playbacks (before physical erosion and magnetic build up set in) and the original source material (well maintained LP or a CD). It isn't usually dramatic (though it has been, on occasion) but I notice it and I find it a worthwhile improvement. I can only expect the difference to be more noticeable when my main system is set up. As for multichannel, I haven't had the chance to try that at home yet, so I can't say. I will say that I consider myself a critical listener, or at least, a serious listener. By that, I mean I sit down and actively listen to music. Not all the time, of course, but frequently. If music was just something in the background while I did something else, I wouldn't bother with hi-res two channel formats. For multichannel, I will have to reserve judgement.
A couple of examples of how I find the sound better with SACD over CD in my current setup:
On Alison Krauss and Union Station Live, I find that I can more easily pick out different overlapping instruments whereas on the CD layer I find the guitar, banjo and dobro tend to smear a little.
Similar experience with Diana Krall's The Girl in the Other Room. A larger sense of space and more articulate detail than on the CD layer.
Greater detail, followed by a larger sense of space, have been the two elements I've noticed in general in SACD vs CD comparisons so far. As I said, not dramatic in most cases, but desireable nonetheless.
Hope this helps.