Purchased a new Yamaha a-s2100 while they are still possible to find, now that the replacement a-s2200 is available. Purchased at Safe and Sound. Great folks to deal with, shipping is immediate, double boxed. The price was decent, considering the new one is retailing for 4k. This unit was installed within a home theater system through the "main input" (which can be switched from the remote). I was not happy with my Onkyo tx-nr3007 powering the big Polk LsiM 707 fronts for stereo listening. After quite a bit of research, I decided on an integrated. I also wanted a quality headphone section built in, did not care too much about streaming or a built in dac, although if the Hegel 190 was affordable for me, I might have jumped at one of those. It would have been approx. double the cost. So, Friday was unboxing and power up check, yesterday was headphone listening with Sennheiser HD650, and today I calibrated it into my HT and did some stereo listening: The headphone section is discrete and to my ears sounds great. Easily powers the Senns, opens them up nicely as well. I hear no exaggerated frequencies, no sibilance, and the music just flows and is very engaging. For my needs, perfect. So far, with two channel, this amp is a very good match with my Polks. It provides nice control of the low end, which was a bit boomy with the avr. The mids and highs are lovely. Once again, seems to put forth what is on the recording without adding anything. But, the sound is "inviting" in a way that the avr definitely was not. I don't go in for too many audiophile adjectives, but compared to the avr, it is simply better in every conceivable way. The Polks need current and this integrated has a great power supply. This amp with the Polks, provides all the finesse and detail I like, without any sizzle or thinness up top. The mids are terrific, voices have body, and can sound real. Dynamics are preserved if they are present, and the stop-start startle that I enjoy is there. I have only listened to CD/SACD so far. Running a Pioneer dvd-79avi via analogue into the 2100 . This Pioneer unit has a very nice power supply/analogue section and the dac is adequate, even though this is many years old. SACD remains as dsd as far as I know. I cannot imagine anyone that loves music being overly critical of this amp. I think the value at the current selling price is high. It is beautifully built, nice to look at and to use, should pair well with most speakers, renders music in a way that promotes a desire to sit and listen. That was missing with the avr. The headphone stage is really good if one enjoys that once in a while. I hear the phono stage is decent. When I get some new racks, I may have to dig out my old Denon 52F and then test it out. I am happy to report back as I get some more time in with this Yamaha. To any that are interested, Safe and Sound in Massachusetts had a couple in stock. I was told by another store in Maryland that Yamaha has none left. If anyone is considering this general model line, might be the last chance to grab a new one from the previous model year. Happy I did.