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jblfans (交易完成后点击此处可对本次交易进行评论,或查看其他人的评论) |
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| 发布时间: |
2007-04-18 05:51:09 |
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5 |
| 销售地点: |
深圳 ...... 电话 : 136326 90098 |
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德国 |
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7800 RMB |
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REVOX B750 经典合拼扩音机， 220v, 8 成新, 状态性能良好. 西德顶级工艺，插咭式音频
放大线路设计。严选摩托罗拉铁壳功率管也是靓声原因之一，黑胶唱头放大部份，用料精
良，仿如一部独立唱头放大器，单这部份已值几千！
www.analogstereo.com/reel2reel_revox_b750.htm
这个充满紧凑revoxb750放大器放大器转移甚至在极端crescendi从一口气furioso可观的纯
洁. 为了能够把紧凑revoxb750放大器、只有高点音乐来分析,过去怀旧管加强. 质量是可以
放大revoxb750并不是简单的瓦数,但它,如何歪曲签证说明了音乐. 此外,它几乎是不可思
议,其中一名必须进行放大. 它甚至工序高复杂的信号形式都是具有最大体积较小以及这种
方式纯粹剩下的扭曲,只能证明最具现代测量方法.
为了避免失真,与管放大器逆反馈原则已经使用. 干脆表示:一部分是由于输出信号再度
gegenphasig门口. 这是由于不平衡和扭曲的钢筋都放弃了革命的一个阶段很大程度上.
在此可以增加一岁晶体管反向反馈到如此强烈摇铃/成为临床的渺小. 但现在一旦HiFi质量
标准,衡量一个并不这么认为可以作为:优良耳朵挑剔revoxb750发现生理健康差异,其中以尽
管是难以计量器具或直因为这可以改善买到. 他们称赞温暖、通才、全"声筒"对面的力度,
清凉,更指transsistorsound.
revoxb750. 干净的放大器本身的研究发现:晶体管扩音机更麻烦对面高素质管放大器"短暂
的". 瞬时叫volatilely,迅速短暂,短暂的音乐频频出现:最短动态跳动,约三角形粘土/口
气,颤音,强烈钢琴通知. 它们导致短,但复杂的扭曲冲动所左右太快一大喜事何时才能纠正
逆反馈. 结果:简要凌驾revoxb750放大器;相移校正的领先幅度高频率地短,大量歪曲.
而"恢复时期"调制是可转让打压.
Studer式revox解决了添扭曲(或添工贸、瞬时互调失真)的复杂措施:输出阶段是全互补对
称. 简单说:正面与负面的信号对称是加强独立晶体管、从入口处撤离. 加上本身的
einzelstufen约,使只有一小共逆反馈是必要的. 总也没有这个逆反馈(因子1:20)revoxb750
放大器是"干净". 所有这听起来plentifully复杂;越看越不过这样激烈的音乐声、从长远来
说,这是至关重要的. 首添免费revoxa740功放、专业舞台高速输出、兴奋的专家和广大的注
意与广义"本身更清廉、脉冲扭曲免费扩音机"尊敬. 同样的概念也被用来与放大器紧凑
revoxb750. 这一技术创新音频HiFinaeherbringt肯定移交音乐真大一步.
技术数据
输出功率
(110W杂音45500)220瓦(4欧姆,每通道)
音乐280瓦(4欧姆140w每频道)
扭曲成比0,1
freqenzgang20Hz的-20kHZ的+/-0.5分贝
加权信噪比比率
磁带优于90分贝
声优于70分贝
相声比66(1kHz的)所有出入口铁路
健全自动控制器,2分贝阶段+/-标本供低音、高音、驻留
99装配晶体管、集成电路4400(调压器)整流桥、二极管48
体重13公斤
Revox 750 intergraded amplifier
This compact full amplifier transfers even extreme Crescendi from breath to
Furioso in impressive purity.
In order to be able to build the compact amplifier B750, only musical high
points had to be analyzed and over nostalgic tubes strengthened.
The quality of an amplifier can be based not simply on its wattage, but to it,
how distortion-free it shows the music.
Music disturbing often felt...
... because always it with noise connected. Today shrubs would speak probably
rather of the distortion factor. In addition, it is nearly unbelievable, which
an amplifier must carry out. It processes even high-complex signal forms both
with smaller as well as with largest volume in such a manner purely that
remaining distortions can be only proven with most modern measuring methods.
In order to avoid distortions, with the tube amplifier the inverse feedback
principle was already used. Simply expressed: A part of the output signal is
attributed gegenphasig again to the entrance. The unevenness and distortions
which are due to the reinforcement are waived by the revolution of the phase to
a large extent.
In the transistor age one could increase this inverse feedback so strongly that
rattle/clink became insignificant. But HiFi is now once a quality criterion,
which one does not measure so much as feel can: The fine ears of fastidious
Musikgeniesser discover physiological sound differences, to which with
measuring instruments hardly is despite - or straight because of - this
improvement to be gotten. They praise the warmer, rounder, fuller "tube sound"
opposite the harder, cooler, more pointed Transsistorsound.
B750. The amplifier clean in itself
The research found out: Transistor amplifiers have more trouble opposite high-
quality tube amplifiers with "transient ones". Transiently is called
volatilely, rapidly temporary - and transient ones occur in the music
frequently: Shortest dynamic jumps, about a triangle clay/tone, a trill, a
strong piano notice. They lead to short, but complex impulse distortions, which
are too fast around a tiny little thing, when they could be corrected by the
inverse feedback. Result: The amplifier is briefly overridden; the phase shift
in the correction leads within the range of high frequencies to short,
substantial distortions. While the "recovery period" the modulation which can
be transferred is suppressed.
STUDER REVOX solved the problem of the TIM distortions (TIM or TID, transiently
intermodulation Distortion) by complex measures: The output stage is full-
complementary, symmetrical. Simply said: The positive and the negative side of
the signal are symmetrically strengthened in separate transistors, from the
entrance to the exit. The einzelstufen are approximately coupled in itself, so
that only a small total inverse feedback is necessary. Also without this total
inverse feedback (factor 1:20) the amplifier is "clean".
All this sounds plentifully complicated; the more clearly however the in such a
way intensified music sounds, and that is in the long run crucial. The first
TIM free Revox power amplifier A740, a professional high speed output stage,
excited large attention among experts and with the descriptor "in itself more
cleanly, by impulse distortions of free amplifiers" was distinguished. The same
concept was used also with the compact amplifier B750. This trailblazing audio
technology naeherbringt certainly the HiFi rendition of the musical
truthfulness a large step.
Technical data
220V voltage
Power output (DIN 45500)
220 Watts (110W per channel with 4 ohms)
Music
280 Watts (140W per channel with 4 ohms)
Distortions
better than 0,1%
Freqenzgang
20Hz-20kHz, +/- 0,5dB
Unweighted signal-to-noise ratio
Tape better than 90dB
Phono better than 70dB
Cross talk (1kHz)
better than 66 railways for all entrances
Sound automatic controller, in 2-dB stages
+/- 8dB for bass, Treble, Presence
Assembly
99 transistors, 4 IC (voltage regulators) of 4 bridge rectifiers, 48 diodes
Weight
13 kg
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