USB新成员！Naim DAC!!茗也开始了！
"The Naim DAC is a true high-end product that can deliver an audiophile and more importantly a musical performance from virtually any digital source. It is also a truly convenient way to access music. The Naim DAC is the world’s first Apple-authenticated high-end DAC that can connect digitally to any iPod2 or iPhone and take the output digitally of anything that would have been sent to the headphone output."This includes UPnP streaming, the thousands of internet radio stations available via apps on the iPhone or iPod Touch and all the music stored on any iPod. The Naim DAC will be available in late September early October.
"The new Naim DAC is a high-performance zero S/PDIF jitter machine. Its power supply is upgradeable and eight S/PDIF inputs include 2 x 75Ω BNC, 2 x RCA and 4 x Toslink (EIAJ optical). In addition, the Naim DAC includes a USB Type A socket on the front and rear panels to facilitate USB memory stick playback and fully authenticated digital connection from an iPhone or iPod.
"In the Naim DAC, the master clock is not recovered from the S/PDIF signal but the incoming audio data is stored in solid-state memory and then clocked back out to the DAC chips using a fixed-frequency local master clock. This eliminates jitter caused by S/PDIF. In essence the memory, master clock and DAC structure behaves in a similar manner to the CD, master clock and DAC structure of a CD player.
"The Naim DAC’s high-speed DSP front-end is electrically isolated from its high-resolution DAC and analogue circuits. The two sections are also run from separate power supplies significantly reducing the effect of RF noise from the S/PDIF circuitry on the DAC stage.
"The Naim DAC digital filtering is handled by an extremely powerful SHARC DSP chip running unique Naim-authored code to create an ultra high precision 40-bit floating point filter. The filter oversamples by 16 times on 44.1kHz data and provides stop-band attenuation of 156dB with virtually no passband ripple.
"Following the digital filter are the DAC’s two mono Burr-Brown PCM 1704 digital to analogue converters as used in the CD555 CD player. Finally, the Naim DAC features a very high performance, low noise and low distortion fully discrete analogue output stage.
[ 本帖最后由 shang_2000 于 2009-8-30 20:34 编辑 ]
具体规格！wadia的170i可以扔掉了！
Zero S/PDIF Jitter design8 S/PDIF inputs: 2 75Ω BNC, 2 RCA and 4 TOSLINK (EIAJ optical)
2 USB inputs
10 separate sine wave (Colpitts) generated clocks for lowest RF noise generation.
Fixed frequency clocks for zero S/PDIF Jitter
16 x oversampling of 44.1kHz or 48kHz signals
Automatically switches to asynchronous sample rate conversion if input is out of specification
Memory buffered digital input
Naim custom designed digital filtering and 16 x oversampling (aka integer upsampling)
Two mono PCM1704 DACs as used in Naim CD555
PS ppgradeable – just add a Naim XPS or 555PS
Includes Apple authentication chip
Full digital connection to iPod (5th Gen onwards) and iPhone
USB Stick music playback to 24-bit 768kHz with control of tracks played
Isolated S/PDIF inputs
Power supply and digital processing completely isolated from DACs and audio output
Remote controllable: Naim or Apple remote
Field upgradable firmware
Ground switchable for optimal performance with all systems
iPod charging is switchable for best sound quality – not charging sounds better.
SHARC® processor for flexibility in digital filtering and future upgradeability
Fully input integrates with a Naim integrated amplifier or pre-amplifier: becomes inputs 7-10
Front input buttons double as transport function buttons when USB or iPod is connected.
Linear Power Supply
210VA Toroidal transformer with 26 regulated low impedance supplies
New bayonet PCB mounting for all circuit boards
Switchable DIN/RCA analogue output connectors decoupled from case for low microphony
Slim line non-magnetic low-resonance chassis and sleeve
Machined from solid, brushed and anodised front panel
要知道茗的cdp555可是10万英镑的dd！
从规格看来，没有平衡输入！:) 希望价格不要太离谱！看来茗的这一招可以把wadia一招制敌了，要是价钱合适的话！ Naim也屈服市场玩起来DAC了
他们不玩平衡口玩的是DIN口 只是两者不兼容
[ 本帖最后由 猎户 于 2009-8-30 20:46 编辑 ] 这是好事啊。原本只晓得apple的现在晓得naim了；现在玩ipod日后就可能会上naim家全套的家用系统，很好的事情呀，总比让hifi厂商固步自封死掉好！
[ 本帖最后由 pig2man 于 2009-8-31 18:27 编辑 ] 希望能把KLIMAX DS打败 跟风的不少嘛:lol
内部图片和原理！
真的是很高！！！！还有面板图片！！！！
还有面板图片！！！！Naim發表了新款的DAC：Zero S/PDIF Jitter DAC，訂價USD 3,500，為第一部Apple認證的High End DAC，可與iPod及iPone相連，並傳送到耳機輸出。其擁有電源升級的空間，擁有8組S/PDIF輸入(BNCx2、RCAx2、Toslinkx4)，前後都有1個USB(Type A socket)，傳送到S/PDIF的訊號是先純在固態硬碟裡，並使用Naim的主時鐘，可減少S/PDIF的jitter問題。其使用兩顆單聲道PCM1704 DACs，就跟CD555用的一樣。 从DAC芯片来看，比LINN的的确要高一个档次。但是号称JITTERFREE，似乎让人觉得夸大的成分居多。但模拟部分设计相当用心，一部让人期待的好机。期待坛里的大侠吃螃蟹。:) 不知道几钱 不知道几钱 DAC芯片比linn的更好？3500美元也不是很贵呀 cdp555哪用得了10万棒子啊。。。。:( 1995胖子。。内部看着还不错啊。。
