CD佳丽大荟萃兼谈【音响发烧三大定律】的应用－－高文Goldmund E... [复制链接]

04 / 08 / 03
  Naim's  new CDS3 reference CD player ($9,150) benefits from Naim's twelve years of research and development on the CD format. The CDS3 employs the latest generation Philips transport utilizing a high quality motor disc drive (VAM 1250 mechanism) and three tuned leaf suspension system to insure disc speed stability and resistance to degrading vibrations. Two additional independent suspension systems isolate both the digital and analog circuit boards for optimal damped spring decoupling. The Naim-designed E.F.M signal "eye pattern" processing filter precedes a Philips CD10, SAA 7324 servo controller chip which is responsible for transforming wave patterns into digital data, error correction and all transport drive functions. Following this, the digital data is routed to a 24-bit/8x oversampling digital filter with HDCD decoding. The data is then sent to two (one per channel) Burr-Brown PCM 1704-K, 24-bit mono D to A converters. HDCD decoding is only activated when playing encoded discs. A separate, fully optimized master clock controls digital to analog conversion and the clock circuit configuration and layout are engineered to minimize jitter that is further reduced by special Naim designed data re-clocking circuitry. A seven-pole analog filter follows the DAC to remove spurious noise. The current to voltage conversion stage and all analog filter stages use discrete transistor amplifiers to optimize performance. Specifications are as follows:
Frequency Response: 10Hz to 20kHz
Peak Output Level: 2.0V rms at 1kHz
Output Impedance: 50 ohms maximum
De-Emphasis: +/- 0.1 dB referred to main response
Distortion and Noise: <0.1% 10Hz to 18kHz at full level
Dimensions 87 x 432 x 314 (H x W x D in mm)

naim的旧旗舰的弟弟－－CDX2，口碑就已经极好……

俺收集到的唯一关于NAIM纯CD机机的中文资料，是其普通级CD机机－－Naim CD3.5 CD机。

Naim CD3，鬼佬发烧友的口碑也很好。

CDX2 CD player


Extensive research carried out over the last few years has been fully employed in producing the integrated CDX2 CD player. Naim has made as few compromises as possible to ensure that the CDX2 offers complete musical satisfaction, rivalling that of the finest analogue turntables.
Integrity and stability of the RF signals read by the laser have been prime design considerations. A suspended transport and low mass magnetic clamping system ensures that the disc spins accurately and silently, unhindered by mechanical resonance.
The mass of the custom-made glass reinforced front-loading drawer mechanism has been carefully calculated to optimise rigidity and isolation. The addition of anti-vibration, resonance-controlling feet compliment the elegant new cast and extruded anti-magnetic chassis to protect the sensitive internal components from resonance and microphonic vibration. Additionally' the internal shielding has been improved bringing about further upgraded performance and lower noise.
Paths between critical components are as short as possible to preserve delicate signals and each stage of the circuitry is powered by a separate regulated supply. Correct earthing is used throughout and there are no digital or headphone outputs.
Both the transport and chipset have been upgraded for the CDX2. The HDCD decoder/digital filter is only activated when playing encoded discs. Eight-times over sampled data is then sent to two (one per channel) Burr Brown PCM mono D/A converters. A separate, fully optimised master clock controls all main digital functions, and the clock configuration and layout are engineered to minimise jitter. A seven-pole analogue filter follows the DAC to remove spurious noise.
The CDX2 has a fully double-regulated power supply with 20 low-noise, regulated power supplies on the main circuit board, plus a separate supply on the servo control board and another on the display board. It is a stand-alone, mains powered machine, which may also be used with the XPS ultra low noise power supply, providing a substantial improvement in sound quality.
Naim research has proved that divorcing the main power supply from a CD player is wholly beneficial, whereas the more common arrangement of housing the converter circuitry in a separate box causes many problems. The Naim XPS power supply is extremely sophisticated with six separately regulated, ultra low noise outputs, featuring a toroidal transformer and six power regulators. This ensures complete stability of the ultra-sensitive circuitry in the CDX2. The same external supply is used with the Naim flagship CDS3 CD player, thus providing a further possible upgrade path from one player to the other.
All main control functions are handled by a microprocessor running Naim-written software. Every aspect of the SAA 7376 servo controller/decoder functionality is under software control: Naim-written codes allow maximised performance in all areas. For example, the transport parameters are optimised for each disc as it is loaded. In addition, special care has been taken to ensure that the player/user interface is as logical as possible with extra features such as "display off" (for improved sound quality) and program cancel, where tracks the listener does not want to hear can be quickly selected.
Worthwhile user features have been added: in addition to a clearer layout of the back panel, RC5 and optional RS232 ports have been fitted, allowing seamless integration into even the most complex of home installations.
In common with the flagship NAC 552 pre-amplifier, the CDX2 has user-configurable outputs, allowing a choice between the preferred DIN output and RCA phono connections, allowing the CDX2 to be used with a wide range of other manufacturers' cables and components.
This machine is designed to be the best in its class, incorporating genuine technological advances to provide a thoroughly enjoyable musical experience.
?Ultra-high quality CD player.
?Twenty power regulators make up a fully double-regulated power supply with exceptional dynamic stability.
?User-configurable versatile (DIN/phono) outputs.
?Full infrared remote control.
?RC5 input for wired remote control in complex installations.
?Optional RS232 input/output for use in full home automation systems.
?The optional Naim XPS power supply provides six regulated power supplies; this significantly reduces supply noise for all circuitry.
The Naim CDX2 plays music from CD in a wholly natural, believable way, providing the same involvement and enjoyment as a high-end analogue source but with tremendous consistency and reliability.    

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    Specifications
Frequency response    10Hz ?20kHz + 0.1dB ?0.5 dB
Output level    2.1V rms at 1kHz
Output impedance    10 Ohms maximum
Phase response    Linear phase, absolute phase correct
Laser type    Semiconductor AIGaAs
Wavelength    780nm ?20nm
Light output (cw)    Maximum 0.5 mW
De-emphasis    ?0.1 dB referred to main response
Distortion and noise    <0.1% 10 Hz - 18 kHz at full level
Mains supply    100V, 115V, 230V (50 or 60Hz)
Dimensions (H x W x D)    87 x 432 x 314mm
Finish    Black

未知NAIM纯CD机机新旗舰CD555，具不具备常见的平衡输出接口和RCA输出接口？

musicwalker 在 2006-4-26 11:10:20 发表的内容 关于NAIM CD555的详细情况和表现，目前还未收集到。 NAIM网页也只是发表了一则新闻，未有详细介绍。

所以在目前，俺只能通过NAIM的音响哲学，加上【音响发烧上帝公平定律】来预言NAIM CD555的表现……

【音响发烧上帝公平定律】在未有质的飞跃之前，音响性的改进，往往伴随的却是音乐性和谐的损失。上帝是公平的！

Set to redefine Naim’s high end range, the CD555 and 555PS have been tweaked and tweaked by Naim’s master engineers to ensure a performance more than worthy of their fine pedigree.
The CD555 doesn’t try to play DVD’s, DVD-A’s or SACD’s. It doesn’t have a digital or variable output. Rather than being packed with every gizmo under the sun, the CD555 just plays CDs and at that it excels.

The DAC’s are mounted in a “quiet room”. Apart from ensuring all critical signals reaching the DAC have immeasurably low jitter the chips are inside a shielded enclosure to keep their environment free of the varying electric and magnetic fields that inevitably occur in a CD player.

555PS incorporates seven regulated power supplies and five secondary windings on the transformer that is 40% larger than in the XPS2. It also has separate dedicated analogue and digital output sockets to minimise high frequency noise modulation of analogue supplies.
Since their first debut at the What Hi-Fi? Sound and Vision show they have both been extensively re-tweaked which ensured Bristol to be another exclusive. There is so far no prices for this dastardly duo.

[执到宝]——英国之宝Meridian G08 CD机
增加时间:2004-9-21 14:54:08　文章来源:
自去年（2003年）CES结束之后，我的心态和甚多Hi-End器材生产商一样，对SACD与DVD－Audio争夺未来数码制式武林盟主的无了期门争，已经感到有点厌倦，因为前景是如此的不明朗便会窒凝音响市场（不论是硬件还是软件）的正常发展，而发烧友更是感到有点无所适从。虽然我自己仍然睇好SACD的潜力，但我只是把它作为CD与LP以外的另外一个讯源来看待而已。正如我一直强调，我们每一位发烧友家里收藏的CD碟片由几百张至数仟张不等，要一下子用其他新制式的软件来代替实在有点不设实际，更何况并不是每一个心爱的曲目都会有新制式的版本？所以每当我发现到新出品的靓声CD机之时，开心的程度会比介绍新款SACD机或DVD－Audio机更甚。堪以告慰的是，自从CD制式的升频升码技术开始步入全面成熟期之后，CD转盘、解码器和CD唱机的质素和靓声程度已经提升至一个前所未有的新境界，就像我在去年下旬实试过的法国Metronome Kalista　CD转盘和C2A　Signature解码器，虽然这个四件头组合所不菲，而且只是单播CD一瓣，但其超级模拟Feel音效却仍然足以令我忍痛掏腰包买下来座镇家中。

超值的进化论

在数码音响领域声誉甚隆的英国数码专家Meridian,其生产的CD机在发烧友的心目中一向是靓声代表，特别是588和800两个型号，重播音效之高绝对是同级机种的超级强者，不过仍然有不少意见认为588的体形太过袖珍，不够贵气，而800则身形过于巨大，而且售价并不便宜。所以当我在去年年底收到Meridian全新G系列的旗舰CD机G08的时候，其典雅高贵银色铝合金机壳配衬黑色玻璃镜面的外观，既醒目Hi-Tech又有型，绝对叫人眼前一亮，但那一排轻触式条状按键却又在提醒你这是一台Meridian的产品，传统与新颖结合的外观而不会流于俗套，设计G系列外型的设计师实在值得一赞。再问问价钱，在英镑汇率一直高企的今天仍然只是定价￥40,100，而厂方又声明G08的设计是由588和800进化而成，若然如此自然靓声可期，卖这个价钱当然是英国大包一件了。无论如何，在听声前当然要先行了解一些设计详情。

先存后提读碟方式

像588和800一样，G08是采用电脑规格的CD/DVD－ROM雷射机芯，并且设置了一个三重缓冲记忆系统，当用家把CD放进CD转盘之后，机芯会快速转动，继而阅读CD上的数码讯息并且储存在记忆系统里，当用家按Play制的时候便会把讯息提取出来，再送往强力的DSP（数码讯号处理器）作升频处理。厂方表示用CD/DVD－ROM先储存再提取CD讯息的做法，可以比普通读碟方式把时基误差减低十倍，从而把高频的透明度和身历声音像的准确度与稳定度大幅提高。而全新设计的时钟系统更把时基误差进一步降低！

G08内置的DSP把CD的16bit/44.1kHz数码流升频至24bit/176.4kHz，再由24/176.4的Delta Sigma DAC解码晶片转换成模拟讯号输出。

G08设有平衡XLR与单端RCA模拟输出各一组，已升频至88.2kHz的数码输出则备有S/PDIF同轴和Toslink光线各一组。面板的七块条状按键是多功能操作，功能会随工作状态而改变，不过操作并不困难，用家只参阅说明书操练一下即可。此外，由于G08先要阅读和储存CD上的音乐讯息才可以播放，所以用家放进CD和操作功能的进修要俾点耐性。不过，我最欣赏还是随G08附送那台多功能遥控器MSR+，它虽然体形略大，但胜在按键编排得非常就手，而且备有学习功能，又有键底自动感应发光功能，真正是一机在手，全屋通行！（非Meridian用家也可以向［别超］独立订购这双MSR+遥控，我自己也订了一双，因为太好用也。）G08的体积为440W*350D*90H（mm），重量8.5kg。

音乐感与Hi-Fi两全之作

　　我试听G08为时接近三个月，配搭过的器材有七、八套之多，听过的各种CD超过70张，次数更加是数也数不清，所以对G08性格可以说是瞭如指掌。以我聆听过这么多极品质素CD组合的经验来评论，G08是市场上少见售价如此［便宜］的Hi-End级CD机之一！G08最吸引我的地方，也是Hi-End　CD机必须具备的条件――背景超级宁静。所以音乐的细节动静特别容易显现，尤其是聆听一些高水准的现场录音，例如Eva Cassidy的［Live at Blue Alley］和［Belafonte at Carnegie Hall］等著名靓声CD，那种现场气氛和约隐约现的热烘烘感觉非常浓烈，毫不刻意地令你感受［在那里］的气氛于无形，投入感自然大得多。其次，G08并没有太强的自己个性，因为我为它配搭过多套不同性格的音响组合的独特个性并没有太大的改变，但G08的怡人音乐感却依然充满在乐声之中，令人听得惬意。另一方面，G08的声音在拥有丰富音乐感的大前题下仍然保持有超卓的分析力，浓密的音质密度，条理清晰分明的屡次感，深阔度扩展得极佳的音场与及玲珑浮凸的立体音像等Hi-Fi元素，实在非常难得。你听Jheena Lodwick的歌声，清晰通透，中人欲醉，吕思清的小提琴质感充裕，松香味浓。阎学敏的敲鼓充满刚阳之气，劲度十足。老实讲，以定价四万元来评价，我何止没有任何投诉，用超值来形容也绝不为过。假如你在今天叫我介绍一台具有充沛模拟音乐感，而又要完全具备Hi-Fi元素的CD机的话，G08是我衷心推荐的首选。

Meridian  G系列器材还有DVD Audio Transport G98、DVD Audio Player Controller Tuner G91。

NAIM纯CD机机美中不足就是：
在新旗舰CD555以前的CD机机，其输出接口全都只有NAIM独有的 DIN接口加上 RCA phono接口，对于未有黑胶唱片PHONO输入接口的功放，便必须使用转换插头连线。

多只香炉多只鬼啊！