Originally Posted by blackspider
the 683 s2 is very power hungry & will need a bigger amp then the Rotel RB1552 mk2.
I will surely will be under driving them for HT duties with the Nad T758 v3.
It seems you have a big room and like it loud enough to sustain reference levels then. Lucky me I have equally power hungry KEF R500/R200c/R100/R50 set of speakers and in my 13.5' x 19' x 7.5' room (half open to a 10' x 13' dining area) and the T758v3 can handle it without a problem. I run it under the reference levels though, generally -25dB or so.
KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.