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| [#521] Benchmark DAC1 Fans Club 1平衡轉RCA頭 2 set the jummper according to the photos  |
batmanamesIA 正式會員61.xxx.xxx.111 |
2012-10-16 15:42 | |
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| [#522] Benchmark DAC1 Fans Club my Benchmark dac1 is very hot like tube amp,should I remove the cover long time ? Thx! |
krell250 正式會員 219.xxx.xxx.65 |
2012-10-16 17:26 |
| [#523] Benchmark DAC1 Fans Club Thats normal, dont remove the cover, The case are used as heatsink (all the regultors like 7805 attached with the cover |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-16 17:39 |
| [#524] Benchmark DAC1 Fans Club please use xlr to rca converter as your rca source |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-16 17:40 |
| [#525] Benchmark DAC1 Fans Club thx!!!!!use xlr to rca ,any big difference?? cd player/tuner to dac1,dac1 to amp,all add xlr to rca converter? 最後修改時間: 2012-10-16 20:16:55 |
krell250 正式會員 218.xxx.xxx.151 |
2012-10-16 20:08 |
| [#526] Benchmark DAC1 Fans Club Yes, sound siginificant different with xlr to rca converter (remember set it to 0dB, not -10dB |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-16 21:29 |
| [#527] Benchmark DAC1 Fans Club Benchmark DAC2 VS Benchmark DAC1 HDR http://theaudiocritic.com/plog/ "Benchmark DAC2 HGC peteraczel | 20 August, 2013 15:49 PCM and DSD D/A Converter with Line-Level Preamp and More Benchmark DAC2 HGC Benchmark Media Systems, Inc., 203 East Hampton Place, Suite 2, Syracuse, NY 13206-1633. Voice: (800) 262-4675 and (315) 437-6300. Fax: (315) 437-8119. E-mail: sales@benchmarkmedia.com. Web: www.benchmarkmedia.com. DAC2 HGC stereo preamplifier with PCM and DSD D/A converter, headphone amp, and asynchronous USB, $1995.00. Tested sample on loan from manufacturer. [For better pictures than I can reproduce here, please go to the website indicated above.] The super D-to-A converter with line-level preamp capabilities is a relatively recent format, although scattered examples of it have been around for a number of years, such as the Benchmark DAC1 HDR (reviewed here in July 2009). Lately a number of high-end boutique companies have seen an opening and announced some insanely overdesigned models at astronomical prices. I haven’t had my hands on any of these (and never will), but it baffles me what they can do that the new Benchmark DAC2 HGC, at a fraction of their price, can’t. The latter has such a complete set of features and capabilities, and such amazing specifications, that I can’t see how any outrageously costly unit could trump it. The Design What is required to design a super DAC/preamp in the second decade of the 21st century is no mystery. You start with the best DAC chip that money can buy, the world champion ESS Sabre³² Reference 32-bit 8-channel audio DAC, and use all 8 channels for stereo, 4 per side. In that deployment, the digital noise reduction spec is 133 dB and the total harmonic distortion (THD) is –120 dB (0.0001%). You can’t do any better; that’s what Benchmark has in the DAC2 HGC, and that’s what the megabuck high-enders have in their models, also. As for the analog section, you go with the Texas Instruments (formerly National Semiconductors) LME49860 operational amplifier, which has a specified voltage noise density of 2.7nV/√Hz and a THD of 0.00003% (–130.5 dB). Low enough for you? Once you build your device around electronic components with numbers like that and keep the construction quality high, as Benchmark does, there isn’t much headroom for improvement, nor much reason for a higher price than $1,995.00. And that’s just for starters; the DAC2 HGC goes well beyond the DAC1 HDR (which is still an “A-team” contender) with a large number of new features, such as native DSD conversion and a hybrid gain control (HGC). The latter is capable of active analog, 32-bit digital, and passive analog attenuation, thus ending all debates about tradeoffs. I am not willing to list and explain all these new technicalities because you can go to http://www.benchmarkmedia.com/dac/dac2-hgc and read all about them in full detail. (Have you noticed that about 50% of the usual equipment review consists of a restatement of the manufacturer’s information? In the age of the Web?) You can even download the 68-page instruction manual from http://www.benchmarkmedia.com/sites/default/files/documents/DAC2%20HGC%20Manual%20-%20REV%20D.pdf and pretend you already own the DAC2 HGC. Since I have no doubt about the state-of-the-art status of the unit’s electronic signal paths, I’ll only discuss matters that Benchmark does not. For example: Despite 16 LED status indicators on the unit’s front panel, you can’t tell whether the DAC2 HGC is in standby mode or totally shut off. Yes, when you first put it in standby mode, the red Dim/Mute LED keeps flashing for a while, as does the blue LED of the muted input, but they stop after a short while, and the panel then looks the same as in power-off mode—no lights at all. This is a bit annoying when you want to listen to something and don’t remember whether the unit should be unmuted or powered up. It’s best to leave it in standby mode at all times when not in use, especially since powering it off sends a 0.15-volt dc pulse through the audio chain, which can result in a serious pop from the loudspeakers if the power amplifier is still on. These minor annoyances don’t in any way constitute a deal breaker for the prospective purchaser but merely illustrate the learning curve necessitated by the unit’s control functions. The latter are not intuitive; the remote control’s buttons are not quite the same as those on the front panel, and there are quite a few press-twice and press-two-together protocols to activate certain functions. I am sure there are geeks who will relish these secret handshakes, but I would have preferred a brilliantly engineered state-of-the-art device to have |
batmanamesIA 正式會員 64.xxx.xxx.165 |
2013-12-08 11:23 |
| [#528] Benchmark DAC1 Fans Club 出年會過台灣，諗住帶埋呢部DAC過去，睇MANUAL， 睇MANUAL係唔係可換過FUSE就得？ FUSE有分220V同110V？ Fuse Holder The fuse holder is built into a drawer next to the IEC power connector. The drawer requires two 5 x 20 mm 250 V Slo-Blo® Type fuses. The drawer includes a voltage selection switch with two settings: 110 and 220. The fuse rating for all voltage settings is 0.50 Amps. The AC input has a very wide input voltage range and can operate over a frequency range of 50 to 60 Hz. At 110, the DAC1 PRE will operate normally over a range of 90 to 140 VAC. At 220, the DAC1 PRE will operate normally over a range of 175 to 285 VAC. Caution: Always install the correct fuses. Always insure that the voltage setting is correct for your locality. |
YuChai 正式會員 223.xxx.xxx.10 |
2020-12-13 16:38 |
