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世界首台专业CD机---PHILIPS LHH-2000
传说它是迷人的、会吸干你的血、并且掏空你的腰包。
LHH-2000全世界只有数百台。现在还在服役的，相信都在收藏家手里了，一般人是没机会听到它。
解码芯片是罕见的14比特的TDA1540、数字滤波为SAA7030，4倍取样、2次滤波降噪。
光学镜由德国著名镜头厂罗敦斯得制造，材料：“光学玻璃”。
分体式盒型遥控器以滑轮操作选曲、步进用。
声音仿似模拟黑胶味道！！！纯厚、平衡、能使听者如上毒瘾般着迷！
LHH-2000当年设计理念：
设计理念并没有过多的考虑到Hi-Fi 和过分的商业行为，使其始终保持着黑胶顶峰过后的模拟状态，因此到目前为止仍然是一些老烧们崇拜的“铭器”。卡拉扬在后期、极其推广音源的数码成分、过分的赞扬Hi-Fi 的效果。从某种意义上讲、老卡才是数字音响的推波助澜的带人！
模拟音源 从当年到现在。频响最好的仍然是FM立体声广播，对于广播级的专业机器、也是到15K-16K已经足够。
对于音频信号的频响、动态、讯噪比，PHILIPS认为14bit 已经足够了。
如果从第一代CD中的DAC芯片单声道14bit 要说指标从今天来讲够垃圾的了。。当年日本机很多都用16bit但没有超取样, 一定要用很多阶的砖墙LPF把44.1KHz的噪声滤去, 而这种analog filter对20KHz右左的相位影响极严重, 声音反而得不偿失。
Philips 更重视4倍超取样工作 认为14bit已有80dB的s/n
对FM广播是足够有余了~而作为一般家用Hi-Fi也完全满足。
14bit 很象模拟立体声的LP的指标，但又远远超过模拟立体声的规格指标。用简单的一两阶LPF就可以处理音乐性很好的模拟输出。这可能就是主要好声的原因之一。 （中文原文/作者：Kell 耳机俱乐部论坛）
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（图文：网上收集及整理）
'From the original :
The advantage offered by Philips as an inventor of the Compact Disc system, now also begins to show at the broadcasting area. The waiting list for the professional Philips CD player LHH 2000 is claimed by Japan.
What is professional CD? The principle of the players is consistent with those of the comsumerequipment. However, professional use by broadcasters, studios and other users require other demands to design, implementation and operation than in the livingroom.
The Compact Disc System LHH 2000, developed by Philips for professional use, offers a great quality. Moreover, the creative possibilities are astonishing. Ultra fast search -up to 13.3 milliseconds-, repeat and combining. The dream of every sound technician. The lengthy search, which so often damaged an LP, has been reduced to a simple operation of a button.
In short, professional CD and the 'special effects' CD are new opportunities to enlarge the technical quality and creativity processing of sound the, even during live broadcasts.
Philips LHH2000 Professional CD- (or Compact Disc) Player System provids an exceptionally precise means for timing music selections during he creation of programmes using compact discs. The accuracy that the systems permits offers great advantages for both the network studios, in the production of live broadcasts, and the professional sound studio making pre-recorded programmes.
The Philips LHH2000 Professional Compact Disc Player System comprises, in its simplest form, a CD-player plus a Control Panel which incorporates a Command Module and a Function Module. The flexibility of the concept is such, that it is possible to connect up to three CD-Players (each of which must have an associated Command Module). This means that whilst one player is in operation, others can be programmed. In addition it enables continuous playing of the units, one after another using the automatic facilities which are porvided.
In multi-player systems, Command Modules are numbered from left to right (other arrangements are available on request). For easier operation, it is recommended that the CD-Players are arranged in the same sequence. All CD-Players are identical, and addressing for a desired sequence (1 or 1 and 2, or 1, 2 and 3) should be carried out using small switch located at the rear, and beneath the loopthrough connectors. For a single player system, the switch should be in the top position '1'.
CD-Players are linked to the Control Module via a single cable from Player 1. Other CD-Players in a system are interconnected using cables between the loop-through connectors on the rear of the units.
In any configuration, one connector on one of the CD-Players remains free. This may be used for remote start/stop operation using faders on the audio mixing desk.
Control Module:
Orignal brochure:
[ 本帖最后由 Pan 于 2008-10-15 21:23 编辑 ] |
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发表于 2008-10-15 20:22:51
提升卡
变色卡
楼主
音源版那里以前讨论过、、、。
是否用光束读LP那种
