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I don't know if anybody is interested in the NFB-7 anymore, but I received it yesterday. So far it sounds good, but I am not yet able to play 192K files. Waiting for a fix.
We are waiting for a complete review. Do you agree with the description in the Pacific Valve website ? They think it is a little on the warm side, which is not the idea that most people have of the Sabre Dacs.
Thanks.
I wanted to be sure the NFB-7 had stabilized. It has about 3 weeks of continuous playing time. It seems to be broken in. First, for convenience, I am quoting, somewhat out of order, the write up at Pacific Valve:
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The Audio gd NFB 7
Ok Folks, here it is.... My own personal favorites!
In my opinion, Audio gd's best DAC so far, is a joy to listen to. It is to a point, where listening to the NFB 7 has become down right addicting. Like the Doge 6, I have to listen to all my CDs over again to find out what I have been missing. The detail is magical in that it retrieves it, yet places it in the proper perspective so it does not sound fatiguing. For its price, its a best buy. I have only heard this, BTW, with EAC ripped FLAC files through a CyberServer.
Headlines
* is the latest flagship Audio gd DAC using the Sabre 32 bit / 192K chips
* Appears on Vic's Picks
* Shows an accelerated buying statistic: the average inventory time for the NFB 7 is 5 days.
* 100% of all water cooler members recommend the NFB-7
* 3 out of 5 water cooler members have purchased the NFB-7
Scoreboard
Bass: Deep, rich musical bass with good kick and slam Mids:. Warm and revealing without being etch or glitzy. Pushes midrange out into the room Highs:
Extended and sweet - high end outstanding. Dynamics: Considerable impact and slam Air around instruments: Excels at placing air and spooky life like quality around instruments. Body and Weight: Considerable heft on male vocals, lower mids horns and massed violins. Warm/Cold: Warms up the music, but never sounds syrupy or overly sweet. Imaging / Sound Stage: Outstanding. Places instruments in their right perspective and gives them body and weight. Resolution / Detail: Above average. Value: One of Audio gd's finest and refined DACs
The Audio-gd NFB-7 is the latest and highest-spec of the NFB series which is a family of non-feedback truly-balanced audio DACs, employing the new and powerful sabre32 ES9018 DAC chip which supports up to and impressive 32Bit/192KHz. The NFB-7 DAC has extremely high fidelity and is based on ACSS non-feedback technology. The NFB-7 uses non-feedback power supply to retain audio purity and natural sound.
Compared to other ES9018 designs, the NFB-7 applies non-feedback ACSS output stage with discrete amplifiers, causing minimal coloration, very low distortion and high linearity of sound. The NFB-7 has excellent analog output stages. For example, the output buffers are Non-feedback with low impedance by applying a two-stage parallel connection for detailed and neutral sound.
The NFB series is designed around optimized power supply to achieve high fidelity audio signals. The NFB-7 uses a total of 16 PSU groups to purify the power supply. 15 groups of high-quality class “A” PSU in a parallel connection enable dedicated double-stage DC supply circuits across the NFB-7 to offer a clear DC power signal through the DAC. The double-stage PSU design allows for extremely low jitter, while the control circuit is powered by a separate regulator to achieve a silent unit operation.
With high-performance components and construction, the NFB-7 uses three R-core transformers (135W total); one 35W R-core supplying power for digital parts, and two 50W R-cores supplying power for analogue output. More than 45,000uf audio-grade NOVER electrolyte capacitors are used in the NFB-7 to ensure ample and smooth power feed. The NFB-7’s internal layout completely separates components such as power transformer and rectifiers to carefully shield from radiating interferences that can cause distortion, yet employs a unified design to enable a wider and deeper sound reproduction.
The NFB-7 is an 8-channel truly balanced DAC which supports Coaxial, Optical and BNC input; 4 ACSS modules with balanced input and output, balanced XLR and single-ended RCA output. Cased in a heavy all-Aluminum chassis, the unit is built to be durable.
water cooler
The Audio gd NFB 7 was evaluated using: Ming Da MC 2A3 preamp, YS Audio Balanced A2SE
preamp, Audio gd ST-7, Audio gd 3 Preamp, Bada Purer Integrated amp, Ming Da MC 3008
Monos, Ming Da MD 845A, CyberServer, Zu Speakers, Magnepan MG 1.6, Infinity Primus, Horn Shoppe Horns with sub, Proac Response 2, B&W Matrix 801.
A couple of trigrams here: The Reference One, The Reference seven, The NFB-7. All of them close,yet so far a part.
Let me make one thing clear though, before we proceed. The NFB -7 is not a better NFB 1. The
NFB 1 and the NFB 7 appear to be made by different makers (even though, they are not) The NFB -1 is analytical and wide open, to the point that if your speakers have a closed in midrange or if you really want to open it up, then the NFB 1 is for you.
With that out the of the way, the REF1, REF 7 and NFB 7 can be look like 3 different versions of
steak sauce. They are all the same in that they are steak sauce, yet each sounds (taste) different?
Get it?
A good way to approach this is to compare all three. While we realize the REF 1 is discontinued, a
comparison is worthwhile, if not academic. So, to help you with your selection, we composed the
following rankings of all three. So off to the races we go: win, place or show:
Resolution:
REF 1
REF 7
NFB 7
Musical Sound:
NFB 7
REF 7
REF 1
Warmth:
NFB 7
REF 7
REF 1
Imaging:
REF 7
NFB 7
REF 1
Midrange Focus:
REF 7
NFB 7
REF 1
Bass Slam:
NFB 7
REF 1
REF 7
High End:
REF 1
REF 7
NFB 7
Not to confuse you, but if your horse shows or places, do not, under any circumstances consider it second rate. We can sum it up: the REF 7 was a warmer REF 1, and the NFB 7 is a more musical version of the REF 7. IF you prefer a DAC that is more neutral then get the REF 7. IF you fall in love with female vocals, like the mid bass of a male voice, or like your horns a little more tamed, then get the NFB 7. Either way, you will not go wrong and will not be sorry. The NFB 7 is highly recommended.
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I can say that for the most part I agree with these above comments from Pacific Valve except I found that since the midrange is slightly forward, its sound stage was slightly forward as well. Like sitting in row 8 in a concert hall. Still the sound stage depth was outstanding. Secondly, this is the only Audio-gd product I have heard so I cannot comment personally on how it compares to others. Also I could not get it to play 192k files, but it did play 176.4 files.
My system:
No headphones. PC server - Neko D-100 outboard Dac, Lynx L22 card (mostly for recording at this point) ;Technics Sp10 w/ Grado Reference; Sony NV9100ES SACD; McIntosh C712 and MC402; DIY kit speakers: D'Apolito designed Modified Super Aria: 1 Seas Milenium Tweeter, 2 Accuton ceramic mids, 2 Cabasse 8"woofers. No power conditioning but a Furman filter; Sonnett II gold alloy interconnects; XINDAK FS-1 speaker cables
Comparison to the Neko D100.
I would say that if I simply walked into a room, I would have no idea which was playing, the NFB-7 or the Neko. It took diligent A/B comparisons to hear the difference between the two. Briefly the NFB-7 had better micro dynamics at low volume. At normal listening volume the difference disappeared. Neither are too warm. They are just right. They are musical in the sense they sound real.
I have a bias for a natural acoustic. I subscribe to the NY Philharmonic and have for years. Given my bias, I do not think the NFB-7 is quite as good as the Neko. The Neko is clearer in the midrange, seems to have a lower noise floor,and never blurs or distorts in the lower-upper frequencies. Female vocals and violins seemed ever so slightly high-lighted by the NFB-7. With the Neko you can hear the air in the hall as if it were real. The NFB-7's mid-range is not as delicate and natural.
Again these conclusions are definite but not obvious on casual listening. Also, the McIntosh amp I am using has an excellent S/N ratio. I feel that with a lesser amp the two dacs might sound identical.
Bottom line, for me, the Neko D100 wins by a nose. If you like female vocals and violins slightly prominent you might prefer the NFB-7. Ditto if you listen at low volumes with no loudness compensation.
My ultimate goal is to equal good vinyl. Both come close but no cigar.