2. amps-preamps
  3. 1091113841

Review of Dartzeel NHB-108 Amplifier

Dartzeel is a relatively new entry to the high-end game. Despite being reviewed by John Marks in a recent issue of Stereophile, the company's only current product offering, the NHB-108 stereo amplifier, hasn't gotten a lot of press on these shores. Hopefully this "review" will do its part in rectifying that.
As many of you probably already know, Switzerland-based Dartzeel is the brainchild of one Herve Deletraz. Herve is a wonderful guy who's dedicated to the very best customer service. As essentially a one-man operation, I'm sure his time is limited, but he's always responded to my e-mails in an extremely courteous, timely manner.

On to the amp. I'm not one for technical details, so I'll leave them to those of you who want to visit Dartzeel's website. Basically, the 108 is a "purist" stereo amp rated at a relatively modest 100 wpc. Its smallish dimensions belie its weight, which measures around 65-70 pounds.

Internally, the amp is incredibly well laid out (if tightly packed), with an attention to detail that one should expect--but doesn't always receive--from components in this price range.

Outside, it's purely love-hate. (Refer to the website for pictures). Either you get it or you don't. Personally, I've grown used to its appearance over time, but it's taken a while to become acclimated. If WAF factor is any sort of issue, practice up on your compliments. Then again, I may be overstating the case. While it's not Liv Tyler, it's not Janet Reno, either. Time reveals its inner beauty.

Performance-wise it's a much more straightforward issue. In my experience the 108 is the most balanced, natural-sounding amp I've ever heard. It has a way with timbre that's downright spooky--up there with the very best tube units one cares to mention. The sound is just "right"--every note is reproduced with a tonal correctness and warmth that is as close to the real thing as I've heard in an amp. Because of it's sheer naturalness, it can take a while to overcome the initial impression that it is somehow soft or rolled off. That is most emphatically not the case! Dynamics are crisp and fast, and the frequency extremes are right where they need to be--not overstated or highlighted at all, just perfectly natural and realistic.

The only potential weakness of the 108 is its power rating. It flows a nice amount of juice for 100 watts, but one could theoretically run into problems with particuarly current-hungry or inefficient speakers. Part of the amp's midrange purity, I believe, is attributable to the use of the bare minimum of bipolars in the output stage. That, of course, comes at the price of power, but in this case the tradeoff is more than worth it. Just take some care in speaker matching--as you should, anyway--and you'll be rewarded with a sound that balances the very best of solid state with a midrange that will make some question whether they even need to fuss with tubes.

Despite its novel physical appearance, the need for careful speaker matching, and the fact that the US dollar has been taking a Tyson-like beating lately, the Dartzeel is a serious contender in the super-amp category. Yes, there are amps out there that do this or that "better" than the 108, but I've yet to hear one that strikes a better balance between the various areas of performance. It's a stunning piece of engineering and a landmark amplifier.

--------------------------------------------------------------------------------

Product Weakness: Appearance is strictly take-it-or-leave-it. Power rating requires some attention to speaker load. Cost.
Product Strengths: Naturalness, midrange magic of the highest order, speed, dynamics

--------------------------------------------------------------------------------
Associated Equipment for this Review:
Amplifier: Dartzeel NHB-108
Preamplifier (or None if Integrated): EMM Labs DCC2
Sources (CDP/Turntable): EMM Labs CDSD
Speakers: Von Schweikert VR-4 Jr.
Cables/Interconnects: Jena Labs Pathfinder
Music Used (Genre/Selections): Rock, blues, country, some classical
Room Size (LxWxH): 24 x 20 x 7
Room Comments/Treatments: Echo Buster, ASC
Time Period/Length of Audition: 3 months
Other (Power Conditioner etc.): Shunyata Hydra-8
Type of Audition/Review: Product Owner
hooper
jtinn
1,124 posts
 
Cinematic_Systems: Mike's room does not "suck out" frequencies below 30Hz. His room has too much volume for the speakers to properly pressurize at those frequencies.

I have tried CAT JL-1 LE's on the Kharma Midi's as well as other high current, high power tube and solid-state amplifiers. In all cases the Midi-Exquisites, while doing a good job micro-dynamically do not excel in the area of macro-dynamics. They are a speaker designed for a small to medium-small room, and are not meant to play the way you describe. There is no speaker in the Kharma line that can compare in that area to the Von Schweikert speakers. This is the main reason I have switched to the VSA line. They do everything well.

I also believe you might be exaggerating when you say you were playing the Midi's "with absolute clarity and impressive drive at 110dB". The type of music you speak of, by nature, is dynamically compressed and the temptation is to keep playing it louder until you feel like there is more dynamics which, of course, there is not.

Since I have heard most of the ATC's as well as Meridian equipment, I would say that either you have a pretty bad ear or you sell those products, which you have not disclosed. The system you speak of has none of the transparency, soundstaging, clarity or tonality that the Kharma speakers are famous for. The ATC's do indeed better the Kharma's in macro-dynamics. Since you have never heard the Von Schweikert VR9SE's, you are not in a position to judge.

You anwered your own question. Those who have owned the Kharma/Tenor combination and now own the Von Schweikert/darTZeel combo, through their "subjectivity" and "personal taste", came to the conclusion that the latter bettered their previous system. It has nothing to do with how good the Kharma/Tenor combination is "in the first place". It is certainly one of the finest combinations I have ever heard and outside of the VSA/darTZeel combo, I have not heard better. This is also not to say that the combination of the VSA and Tenor amplifiers or the Kharma and darTZeel amplifier is not outstanding.
gladstone
296 posts
 
It seems to me it comes down to personal preference. I never succumbed to the Kharmas because, for me, they lacked the "jump" factor. The von Schweikert, Jrs., which I heard next to the Kharma midis in NY, had it. I was impressed. But: it's certainly possible that the Kharmas are more refined; that may be the tradeoff, though not having heard the upper-echelon von Schweikerts, I don't know whether that's the case or not.
cinematic_systems
282 posts
 
Well then I guess we have a disparity of experiences;

Hooper a composite of equipment owners opinion makes anything you say as valid and important as anyone's and requires no qualification except that's how you felt, and the more we know about your decisions and room and equipment the more we can relate what you say to our own preferences. If you feel we had a semantic disconnect then Its important to clarify and get a composite of others experiences. Your opinion matters as does ML's etc. We now are getting a better picture.

The Kharma's do not have the jump factor because they do not distort the leading edge and it is insult and fabrication to say that a Midi exquisite cannot handle a lowly 110dB , Gladstone had his jazz going at 104-105dB average at 15 feet...that's 5M...113.8dB @ 1M! and if you didn't measure it you wouldn't have known it was that loud. Adding a subwoofer to the Midi Exquisites will allow them to play even louder and give them the same dynamic capability as the VR9's. The only difference between the VR9's and the Kharma's is the subwoofer, which greatly increases the VSR's output capability as it would the Kharma.
rumney510
39 posts
 
Jtinn,
How would the VSA VR9/lamm ML2.1 combination stack up againtst the VSA/darTZeel ?
andy
howie
230 posts
 
I guess I'm someone who prefers to lean towards politically correctness. So when I see a strong statement that is so obviously subjective, I prefer to have it clarified. Obviously, there is nothing wrong with personal opinion.

But whenever I read something negative about an equipment's sound, I wonder what someone is judging things by. I do listen mostly to small group jazz ensembles in my medium sized room. So for something like a piano trio or jazz quartet, even though each instrument is pretty dynamic, even at realistic volumes, visceral dynamics and ultimate loudness almost never come into play. When musicians are listening to each other and playing well with each other, you'll be grooving and the impact of the music will naturally be there. Then there are music that are meant to be beautiful. You don't want anything to jump out at you or the beauty is ruined. A lot of music systems sound quite musical to me, only that they do things differently.

But even though I've never heard them, it's not hard to see why the VR9s are better at ultimate macrodynamics than the Kharma Midi-Exquisities. They sound to me like different speakers. So many tough choices in audio.
More to discover