I have the STR Stack and have been really happy with it. The ARC stuff is very cool and can make a difference, but it's not going to help your 80hz problem. That's a placement or room treatment issue and I know that's a tough one for you. So ARC will make things sound better but not exactly what you're dealing with.
Room Correction Required
I have to part with my Supernait 3. I have enjoyed it as much as possible in a room where I have a 7bB at 80hz hole at my listening position. It starts at about 125hz, bottoms out at 80hz, comes back up around 60hz before dropping into a black hole at 50hz. On top of that I have a serious peak (12dB) at 40-30hz. It makes for an odd musical experience. Obviously this is not the fault of the Naim. My previous unit did the same thing but I was wishing that the Naim would power through it. I also replaced my speakers in the same vain hope. Wishing vs. science..... oops. When I get out of the null zone the tonality is great but I can't be seated that far out of the space without looking really dumb or antisocial. Also the sound stage is wrecked when I get out there.
I have lived in this home for a year and a half. The issue was worse before I pivoted the room arrangement 90 degrees. My partner is an artist and designer, so I have blown all my rearranging capitol for the next 10 years (her words not mine). We looked at adding room treatments and perused the currently available options which look like church or hospital decor; SO NOT HAPPENING (her words again but I have to agree- yuck).
As a result, I need an integrated with room correction. Yes, I'm sticking with an integrated because I want a minimal gear set.
-TT via Gold Note PH-10/PSU10, outputs either balanced or single end.
-Prefer built in streaming to lose another couple boxes but it's not a deal killer. Current DAC outputs balanced or single end.
-Powering MA Silver 500 7G, not looking to change these.
-Single Revel B112v2 Subwoofer (not currently in use as the 500's are already peaking in the same range)
-TV, currently input optical to the DAC.
The top contenders are:
Anthem STR (no streaming)
NAD M33
Lyngdorf TDAI 1120 (the 3400 is not budget friendly).
Yamaha RN-2000a
So if anyone has experience with these units I'd like to hear about it. Also, I know it's going to happen and god bless you all; someone is going to tell to reposition my speakers (been done), stuff the ports (been done) get room treatments (ummmmmm nope?) and buy Luxman, Sudgen or something else because of __________ (fill in the blank). That's fine and I appreciate the advise but I don't see any of that happening in this room anytime soon under the current design driven regimen I live under.
Thank you all for taking a look!