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| [#1] Benchmark DAC2 Fans Club .  |
batmanamesIA 正式會員61.xxx.xxx.111 |
2012-10-12 07:36 | |
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| [#2] Benchmark DAC2 Fans Club Benchmark DAC2 HGC A New Reference Benchmark's DAC1 family of D/A converters have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1. The DAC1 has been the best-selling 2-channel reference-quality converter and is in daily use at many of the finest recording studios and mastering rooms. DAC1 converters are also enjoyed by thousands of audiophiles. But, Benchmark has just raised the bar ... the DAC2 HGC now defines a new reference. Performance The DAC2 HGC outperforms the DAC1 in every respect. It has lower noise, lower distortion, improved accuracy, outstanding musical detail, precise stereo imaging, an advanced digital filter design, and a new high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock2™ jitter attenuation system. Internal digital processing and conversion is 32-bits, and includes 3.5 dB of headroom above 0 dBFS. Four balanced 32-bit D/A converter are summed together for each balanced output. The performance of the DAC2 HGC exceeds the measurement limits of today's state-of-the art test equipment. Discover the analog sound of the DAC2 HGC. New Features DAC1 customers requested many new features which have been integrated into the new DAC2 HGC: Sample Rate Display Word Length Display More Digital Inputs (5 total) More Analog Inputs (2 total) More Analog Outputs (3 total) Digital Pass Through Native DSD Conversion Polarity Switch Asynchronous USB 2.0 Driverless Asynchronous USB 1.1 Home Theater Bypass Bi-Directional 12 Volt Trigger Power Switch Low Power Consumption New Benchmark Technologies Benchmark introduces some exciting new technologies in the DAC2 HGC: Hybrid Gain Control High-Headroom DSP UltraLock2™ Jitter Attenuation System Quad 32-bit balanced D/A Conversion System Multi-Mode Asynchronous USB Audio System Distributed Power Regulation Hybrid Gain Control "HGC" is Benchmark's unique Hybrid Gain Control system. The DAC2 HGC combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All inputs are controlled by the rotary volume control. This volume control moves in response to commands from the remote control. Analog inputs are never converted to digital, and digital inputs never pass through an analog potentiometer. Digital inputs are precisely controlled in the 32-bit DSP system. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion. Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range of the converter. The attenuators optimize the gain staging between the DAC2 HGC and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The" HGC " system will make full use of your power amplifier's dynamic range. Experience new details in your favorite recordings. Native DSD Conversion All digital inputs on the DAC2 HGC support native DSD conversion. DoP 1.0 is automatically detected on all digital inputs, and the system seamlessly switches to native DSD conversion. DoP 1.0 is supported by many media players, and DSD downloads are now available from several sources. UltraLock2™ Jitter Attenuation System UltraLock2™ is an improved version of the UltraLock™ system used in the DAC1 and ADC1 product families. DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock2™ system eliminates all audible jitter artifacts. High Headroom DSP - with 3.5 dB "Excess" Digital Headroom All of the digital processing in the DAC2 HGC is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC2 HGC avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement. Multi-Mode Asynchronous USB System Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter. The DAC2 HGC has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC2 HGC. The contents of the buffer are then asynchronously transferred to the D/A conversion sub-system. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems. An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC2 HGC becomes an available audio device. The USB subsystem remains active when the DAC2 HGC is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on. Quad 32-bit Balanced Conversion System Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC2 HGC is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage. Diagnostic Tools - Sample-Rate and Word-Length Indicators Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC2 HGC confirm the proper operation of your media player. Polarity Switch You may encounter recordings with inverted polarity. The DAC2 HGC includes a polarity switch to correct the problem. Home Theater Bypass The DAC2 HGC can be integrated into a home theater system. Typically the DAC 2 HGC drives the left and right power amplifiers, and an analog feed from the home theater system is connected to either of the analog inputs on the DAC2 HGC. A programmable Home Theater Bypass function sets the pass-through gain to unity when the surround system is active. The DAC2 HGC includes an indicator light that is illuminated when bypass is active. Digital Pass Through The second coaxial input can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.0). Dolby digital and DTS formats can be passed through to a surround processor. Bi-Directional 12 Volt Trigger Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 HGC can be used as an input or output or both, and is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC2 will also respond to a 12 volt trigger and follow the actions of another audio component. Power Switch The power switch can place the DAC2 HGC in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down. Low Power Consumption The DAC2 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical. Distributed Power Regulation To achieve the lowest possible noise, the DAC2 HGC uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator. |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-12 11:42 |
| [#3] Benchmark DAC2 Fans Club How much $$$$$$$$ ? $1995.00 USD Not that expensive compared with it's Pre & HDR. If they can provide a trade in offer, that will be good. 最後修改時間: 2012-10-12 13:37:49 |
jimmyihv 正式會員 118.xxx.xxx.15 |
2012-10-12 13:34 |
| [#4] Benchmark DAC2 Fans Club highly likely Sabre ESS9018 chipset  |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-12 14:17 |
| [#5] Benchmark DAC2 Fans Club http://everythingaudionetwork.blogspot.hk/2012/10/breaking-news-audiophile-dac-preview.html |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-13 16:01 |
| [#6] Benchmark DAC2 Fans Club "During my initial listening sessions, the DAC2 HGC revealed a smoother, more layered presentation than the DAC1 and other converters I had on hand for the review. And the DSD playback, via a Macbook Pro and the Audirvana software, worked really well. The DOP.1 DSD file protocol allows DSD files to be output, via the encoding/playback software, over a USB-fed PCM 24/176 signal, then decoded by the compatible converter. Pretty slick and it works" http://everythingaudionetwork.blogspot.hk/2012/10/breaking-news-audiophile-dac-preview.html |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-14 04:40 |
| [#7] Benchmark DAC2 Fans Club Seem to be well designed & well built. It will be a direct enemy of Mytek! |
CKKeung 正式會員 116.xxx.xxx.87 |
2012-10-14 11:40 |
| [#8] Benchmark DAC2 Fans Club DAC1 already won Mytek by a mile! |
s6410 正式會員 123.xxx.xxx.101 |
2012-10-14 18:44 |
| [#9] Benchmark DAC2 Fans Club s6410 ching do you mean the latest mytek(ess9016)? bat |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-14 21:05 |
| [#10] Benchmark DAC2 Fans Club Mytek produces a more "pleasing" sound due to some roll offs in both frequency extremes...Just like the 3/5A equivalent of DAC. Benchmark is geared for the studio and sounded PLAIN neutral. This DAC1 HRC is also somewhat sensitive towards fuse and the USB cables connected to computer. The unit could sound quite edgy if connected through low quality USB cables (Or that may just be the case with most USB DACs!!!) 最後修改時間: 2012-10-14 22:11:14 |
s6410 正式會員 123.xxx.xxx.101 |
2012-10-14 22:10 |
| [#11] Benchmark DAC2 Fans Club I listened to Mytek (192) at Tsang Fook and it does not sound like rolled off at all. In fact, it is very neutral and have correct proportions in all details. What it does not do is producing exaggerated/digital sound. The Benchmark DAC2 is probably going to same direction and is a direct match against the Mytek 192. |
apprentice 正式會員 203.xxx.xxx.1 |
2012-10-15 12:49 |
| [#12] Benchmark DAC2 Fans Club Any CHing who has listened to both Banchmark DAC2 and Mytek? What are their differences? |
bigdish 正式會員 202.xxx.xxx.50 |
2012-10-15 12:58 |
| [#13] Benchmark DAC2 Fans Club http://www.computeraudiophile.com/f6-dac-digital-analog-conversion/benchmark-launches-new-dac2-hgc-13598/ |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-18 21:19 |
| [#14] Benchmark DAC2 Fans Club I DON'T agree with s6410! I AB compared Mytek with DAC1 a year ago and I chose Mytek undoubtedly even though I had been an user of DAC1. Mytek has much better focusing and more finer details than DAC1. If you found the sound of DAC1 pure, you should have also found that of Mytek much MORE pure and natural. 最後修改時間: 2012-10-19 08:57:03 |
KevinLo 正式會員 218.xxx.xxx.179 |
2012-10-19 08:53 |
| [#15] Benchmark DAC2 Fans Club Dac1 is the classic for the past, was very successful. But, comparing to the new DAC now in the same range u just asking too much. That is why dac2 coming into picture. Let's see if the new version becomes another legend. Dac1, forget it. |
clifflam 正式會員 202.xxx.xxx.89 |
2012-10-19 10:37 |
| [#16] Benchmark DAC2 Fans Club Any sound quality and performance review by R33 Ching? |
newboy 正式會員 59.xxx.xxx.250 |
2012-10-19 16:49 |
| [#17] Benchmark DAC2 Fans Club I AB compared Mytek with DAC1 a year ago and I chose Mytek undoubtedly even though I had been an user of DAC1. Mytek has much better focusing and more finer details than DAC1. If you found the sound of DAC1 pure, you should have also found that of Mytek much MORE pure and natural. ---------------------------------------------- Your audition is AB testing? With the same system? OR just hearing one unit at a time in their respective offices/showrooms? For either of the unit, what I can tell you is their FULL potential have NOT been explored. They can sound much better with a good USB cable and sound xxxxingly digital if coupled with a cheapy USB digital cable! |
s6410 正式會員 220.xxx.xxx.206 |
2012-10-19 19:52 |
| [#18] Benchmark DAC2 Fans Club From my DAC experience, Benchmark DAC1 ＜＜ Grace m903 ＜＜ Antelop Zodiac+, Mytek Stereo192-DSD ＜ Grace m903 |
tom55 正式會員 221.xxx.xxx.136 |
2012-10-20 00:02 |
| [#19] Benchmark DAC2 Fans Club Benchmark DAC2 = Invicta (taste perference) ＞＞ Grace, Antelope, mytek |
batmanamesIA 正式會員 61.xxx.xxx.111 |
2012-10-20 00:24 |
| [#20] Benchmark DAC2 Fans Club Benchmark DAC1 ＜＜ Grace m903 ＜＜ Antelop Zodiac+, --------------------------------------------------- I listened to both DAC1 an dM903 at Mongkok. Benchmark sounded very neutral although some may coin it as cold (which is actually a very linear presentation with no emphasis in any frequency range). Grace M903 appeared to sound more musical but indeed there is a lot of make-up here and there, including rounding off in very high frequency extension, some polishing in mid vocal and a little boost in mid and upper bass. The whole outcome is a more easy sounding DAC and may easily attract untrained ears. Indeed I view both to be rather low end DAC, given that I used to listen to Spectral D/A for years...However I like Benchmark more because it is more straight forward. However its power supply is surely not high end and seems to be easily affect by EM noise and poor USB cable. |
s6410 正式會員 123.xxx.xxx.101 |
2012-10-20 02:32 |
