Now I feel I've heard enough of the darTZeel NHB-18NS to comment on its sound and the difference between it and the ARC Ref 5 SE. First, the Dart costs new more than twice the ARC so the ARC is an incredible bargain. Both are expensive, but the ARC, like a Porsche, is a bargain in its class. However if you're willing to ante up, or can find a very nice Greek who is ready to sell after 6 years ownership, go for the Dart since the ARC is not in its league. I doubt that any preamp is.
Why? First realism which is what this is about, to make any music reproduction sound real, and the Dart does this. I will lay aside the usual clichés like transparent, wide soundstage, holographic sound - it has all those things in spades - and concentrate on what stands out to my ear as different from the ARC.
The Dart digs down deeper into the music while the ARC, good as it is, skims the surface in comparison. The Dart reveals the meat of the music, mid-range down to bass, where it shines. The tone is darker than the ARC although the highs sparkle and shimmer in the piano, for instance. The mid-range of the piano has a snarl and the highs shimmer, all the complex harmonics revealed. This is a supreme test of any reproduction. Couple the piano with a kick drum and more is revealed as the thump of the drum is just there and reflects off the floor at the very bottom, with the help of my Triton Ones with built in subwoofers. The result on a piano trio, e.g. Jacques Lousier playing Satie, is stunning.
Also the music reproduced has weight like real music. The ARC is good at this, but the difference is obvious on first listening. Real music can be intrusive and impolite, and the Dart gets this. Digital artifacts disappear (with the help of my EMM Labs) so that there is no fear that a violin is going to sound like being bowed by a razor blade. On digital the Dart is close to analogue, even better on my system. The timbre of instruments is therefore correct as stands out in small-group jazz. Play Jimmy Rowles and Ray Brown and the duo is in the room. Must see if I can conjure up Diana Krall. On Beecham conducts Schubert symphonies, the midrange of the orchestra made no secret of its presence, not a bit of edge or shrillness, very coherent on an old recording. I am looking forward to hearing Oue conduct Rachmaninoff's Symphonic Dances, on RR, one of the great classical CDs.
Regarding the phono I am not all the way there but getting there. I heard tone color in Paul Simon's Graceland, never heard before, like the startling drum whack at the beginning. I probably will stay with the Dart phono section as I'm enjoying Coleman Hawkins as I write.
Hope this helps and thanks to all for the wise counsel. The three orange lights make me smile and this is before any possible upgrade. Right now I'm not messing with fate.
Viva darTZeel!