mekanoplastik
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DAC-AH impressions.
DISCLAIMER: please take this review as my personal oppinion. I am not a pro reviewer, i do not own megabuck equipment and i don't care about monthly flavors...i will say what i think and just hope i help others to make decisions.
I got interested in this dac mainly because its price ($135 US), for its use of quality components -dacs, receiver, regulated supplys, caps, resistors...- and the atractive concept of a NON-OS with 8 paralleled dacs.
NON-OS seems to be the big thing going on in the DIY world, they are simple and cheap but they still get very good reviews compared to more complex dacs. Simplicity of construction was a main factor in this purchase, as i like attacking almost every piece of equipment i own with a soldering iron. It is just a matter of time...i already have a upgrade plan laid out and ready for this dac. (full schematics were included in the purchase)
I purchased this dac from DIYCLUB a Hong Kong based store for audio components, pcb's, and some already built equipment based in their own designs -like this dac-
Ordering was pretty straight forward, communication was excellent, receiving answers and confirmation e-mail within few hours. The dac got shipped within 2 days and i got a tracking number.
Since it was shipped via surface -at my request- it took almost 2 moths
...my bad...i should have ordered air...oh well...i will order air next time. (air is about 2 weeks)
Packaging: ugly, and simply put....bad. Packaging is very important, why the OIY*&^)( would they save some cents in a mall case and crappy stuffing? Anyway....because the packaging was so tight the selector switch at the back of the unit (optical/coax) arrived broken which upset me very much...but it was just a switch...and i didn't let a switch -which i can easily replaced- ruin my day.
Stetics: smaller than i thought, flat black color, golden allen screws and a simple power switch ...nice..as i said, i like simplicity. The led is blue, but not “anoying blue flashlight” kind... i like the overall looks...very industrial.
Opening the hood...: cool red pcd, clean layout, components seem to be the advertised -oscons, elna audio caps, nichicon golds, sanyo (?), films, and philips at the output, tda1543 dacs, cs8414 receiver, lmXXXX regulators, nice resistors a nice custom r-core transfo and OPA602 opamps....very good overall impression.
After further inspection with a magnifier and a flashlight i found some funny looking solder joints, as if they were suffering from “Friday 4:30 pm sindrome”
and some resistors had the lacquer cracked. They are 100% functional but not a nice sight.
Cables are cleanly routed and packed, and the pcb is clean. There is one spot were the pcb is lifted, in a resistor lead, but the point is routed in the bottom part of the board and the top goes to nowhere. While this is another upsetting point, i try to forget about it thinking the bottom part is were the connection is and it doesn't really matter if the top ring is lifted. (It really does not matter....but i do not like it).
So far: good communication, bad packaging, good components and lousy construction.
Sound:
i am using: NEC-602 transport -> DAC-AH -> HP-100a with sovtek tubes -> JVC HA-DX3 headphones, with really crapy interconnects and a terrible digital interconnect ( what a funky setup !!
)
i connected everything and fired it up with no music playing for the amp to warm up. I heard noise with the volume all the way up, this noise was coming from the dac – i know how the amp sounds -. I moved the cables a bit and it got better...so i really need to get some nicer cables. There was also some hiss when i pressed pause - i think it came from the NEC ps -. I am confident i can minimize all of this issues by using good interconnects and just tuning up the system. (remember, this is the first time all this components are together...and the dac needs to burn in). I also think a big part of this noise is caused by the fact that my house does not have ground connection at the power outlets – normal for an almost 100 y/o house-
Music: nice...very nice actually. Compared to the analog out of the 602, my turbo portable, my laptop and a panasonic dvd...the dac-ah is clearly better than any of them...by a big margin. The main characteristic i can hear coming from this dac is a solid and full sound, no weak points. It is pretty smooth but still has the punch to make you blink, it has good bass (not one of my headphones strong points). What pleased me the most, was listening jazz (the JVC are pretty good at it). For the first time i could really tell were the musicians were placed..the instruments are placed in different layers...not coming from just a unique sound source and i can tell how each has its own place..cool!
I have just listened 10cd's or so...and i am still learning how this dac performs...but so far i am really happy. All of this positive facts made me forget about the switch, the lousy solder joints and the need of new interconnects.
Keeping in mind what i paid for the source setup, $135 for the dac and $15 for the transport, i am positive there is nothing in this price range that comes even close.
As you can see, my whole setup is about $350~400...
I wrote the diyclub guys and told them about the solder joints and the switch, they simply said i can send the pcb and i will get a new one...while i will not send the board -as i would have to dessasemble all the components- is good to see they replied and were wiling to work something out.
Interesting pages ..
http://www005.upp.so-net.ne.jp/mick-guitars/pc/dac-ah/
http://www.diyclub.biz/
Higher resolution pics or custom pics upon request.
edit:// added pics and corrected some grammar
edit:// corrected a technical description mistake
DISCLAIMER: please take this review as my personal oppinion. I am not a pro reviewer, i do not own megabuck equipment and i don't care about monthly flavors...i will say what i think and just hope i help others to make decisions.
I got interested in this dac mainly because its price ($135 US), for its use of quality components -dacs, receiver, regulated supplys, caps, resistors...- and the atractive concept of a NON-OS with 8 paralleled dacs.
NON-OS seems to be the big thing going on in the DIY world, they are simple and cheap but they still get very good reviews compared to more complex dacs. Simplicity of construction was a main factor in this purchase, as i like attacking almost every piece of equipment i own with a soldering iron. It is just a matter of time...i already have a upgrade plan laid out and ready for this dac. (full schematics were included in the purchase)
I purchased this dac from DIYCLUB a Hong Kong based store for audio components, pcb's, and some already built equipment based in their own designs -like this dac-
Ordering was pretty straight forward, communication was excellent, receiving answers and confirmation e-mail within few hours. The dac got shipped within 2 days and i got a tracking number.
Since it was shipped via surface -at my request- it took almost 2 moths
Packaging: ugly, and simply put....bad. Packaging is very important, why the OIY*&^)( would they save some cents in a mall case and crappy stuffing? Anyway....because the packaging was so tight the selector switch at the back of the unit (optical/coax) arrived broken which upset me very much...but it was just a switch...and i didn't let a switch -which i can easily replaced- ruin my day.
Stetics: smaller than i thought, flat black color, golden allen screws and a simple power switch ...nice..as i said, i like simplicity. The led is blue, but not “anoying blue flashlight” kind... i like the overall looks...very industrial.
Opening the hood...: cool red pcd, clean layout, components seem to be the advertised -oscons, elna audio caps, nichicon golds, sanyo (?), films, and philips at the output, tda1543 dacs, cs8414 receiver, lmXXXX regulators, nice resistors a nice custom r-core transfo and OPA602 opamps....very good overall impression.
After further inspection with a magnifier and a flashlight i found some funny looking solder joints, as if they were suffering from “Friday 4:30 pm sindrome”
Cables are cleanly routed and packed, and the pcb is clean. There is one spot were the pcb is lifted, in a resistor lead, but the point is routed in the bottom part of the board and the top goes to nowhere. While this is another upsetting point, i try to forget about it thinking the bottom part is were the connection is and it doesn't really matter if the top ring is lifted. (It really does not matter....but i do not like it).
So far: good communication, bad packaging, good components and lousy construction.
Sound:
i am using: NEC-602 transport -> DAC-AH -> HP-100a with sovtek tubes -> JVC HA-DX3 headphones, with really crapy interconnects and a terrible digital interconnect ( what a funky setup !!
i connected everything and fired it up with no music playing for the amp to warm up. I heard noise with the volume all the way up, this noise was coming from the dac – i know how the amp sounds -. I moved the cables a bit and it got better...so i really need to get some nicer cables. There was also some hiss when i pressed pause - i think it came from the NEC ps -. I am confident i can minimize all of this issues by using good interconnects and just tuning up the system. (remember, this is the first time all this components are together...and the dac needs to burn in). I also think a big part of this noise is caused by the fact that my house does not have ground connection at the power outlets – normal for an almost 100 y/o house-
Music: nice...very nice actually. Compared to the analog out of the 602, my turbo portable, my laptop and a panasonic dvd...the dac-ah is clearly better than any of them...by a big margin. The main characteristic i can hear coming from this dac is a solid and full sound, no weak points. It is pretty smooth but still has the punch to make you blink, it has good bass (not one of my headphones strong points). What pleased me the most, was listening jazz (the JVC are pretty good at it). For the first time i could really tell were the musicians were placed..the instruments are placed in different layers...not coming from just a unique sound source and i can tell how each has its own place..cool!
I have just listened 10cd's or so...and i am still learning how this dac performs...but so far i am really happy. All of this positive facts made me forget about the switch, the lousy solder joints and the need of new interconnects.
Keeping in mind what i paid for the source setup, $135 for the dac and $15 for the transport, i am positive there is nothing in this price range that comes even close.
As you can see, my whole setup is about $350~400...
I wrote the diyclub guys and told them about the solder joints and the switch, they simply said i can send the pcb and i will get a new one...while i will not send the board -as i would have to dessasemble all the components- is good to see they replied and were wiling to work something out.
Interesting pages ..
http://www005.upp.so-net.ne.jp/mick-guitars/pc/dac-ah/
http://www.diyclub.biz/
Higher resolution pics or custom pics upon request.
edit:// added pics and corrected some grammar
edit:// corrected a technical description mistake