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Magnum-Dynalab MD-90 FM Tuner

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A name long associated with superlative audiophile tuners, Magnum-Dynalab tuners have established a reputation world wide for their outstanding performance.

Though not inexpensive, Magnum-Dynalab offers a range of FM tuners that will fit most budgets.

If you are serious about FM, you’ll find complete satisfaction with the performance of a Magnum-Dynalab tuner.

Magnum-Dynlab believes that analog tuning circuits provide performance superior to digital or frequency synthesis tuning. In contrast with the frequency synthesis method of tuning, analog is not dependent on a digital microprocessor chip to establish the tuner's receive frequency. With analog, tuning is accomplished using specially-selected, discrete components in the tuner's critical "front end." In the Magnum Dynalab design, these components are selected and matched so that a unique balance of sensitivity, selectivity and sound can be maintained.

However, the most significant advantage in analog is that it delivers control into the hands of the user. Infinite tuning is available in order to establish maximum stereo separation or to detune slightly in order to minimize on-frequency noise. With frequency synthesis tuners, this capability is offered usually in fixed, 50KHz steps. While FM stations themselves are rarely found to be transmitting outside the +-2KHz standard, FM station signals that are rebroadcast over cable may not be quite so precise.

The MD-90's in house manufactured 3-stage RF front end is sure to extract the most intricate signals from amongst the milieu of FM congestion that abounds in today's urban markets. Additional support is given through the custom Auto Blend RF circuit, which constantly monitors and varies stereo separation, insuring optimal "stereo quieting" during your listening sessions.

The MD-90 incorporates all functions in a totally redesigned motherboard. This integration has provided the necessary design efficiencies to allow consistently higher levels of selectivity to be maintained. Along with added selectivity, the MD-90 has a redesigned power supply circuit that maintains the tuner circuitry at standby at all times when the tuner is connected to a live AC source. The MD-90 can now also house the analog remote system (FTR) inside the chassis allowing for precise analog tuning through the optional remote control.

Extra: Imagine the superb performance of a Magnum-Dynalab tuner enhanced with the enchanting liquidity of vacuum tubes. The boys at Magnum-Dynalab did just that and now offer a class a triode analog output stage as an option on any of their models. Check out the “Related Products” link below to learn more.

Features:

• BW 1/ BW 2 bandwidth control - Switchable to effectively control annoying sideband interference.
• Mute circuit - noise-activated with manual defeat switch.
• Auto Blend RF circuit - automatically monitors and varies stereo separation insuring optimal "stereo quieting" during your listening sessions.
• Stereo/Mono Mode - User switchable.
• Digital frequency display - Independent frequency counter derives input from tuner's local oscillator section and displays in soft, amber 0.5" LED numerals.
• Balanced Outputs-allows Felxibility in system design
• Precision Flywheel Tuning -gives accuracy and ease of tuning.
• Retail $995 (Special pricing listed below)

Click on the Review link for more information on the MD-90T employing the tube output stage option on the MD-90.

Click here for a review of this product.
Related Products
Magnum-Dynalab ST-2 Omnidirectional FM Antenna
Magnum-Dynalab Vacuum Tube Option

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Our Price
Magnum-Dynalab MD-90 FM Tuner
$1075.00

 

 

 

 

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Magnum Dynalab MD-90
  胆味盎然的真空管调谐器

http://www.gcaudio.com/images/products/109.jpg




● 谭泽江

  最近,Magnum Dynalab推出了全新系列的调谐器,其中多个型号都使用了真空管,对于无胆不欢的发烧友,是个大好消息。


  还记得在学生时代,电台广播是最佳的免费音乐来源。当时无论在休息或做作业时,都喜欢开着收音机,在悠扬的乐声中度过了无忧无虑的少年时代。

  如今已是网络时代,对于现代的学生而言,最受欢迎的免费的音乐来源也许是MP3而非电台广播;但对于发烧友而言,MP3虽然免费,但却因为文件经过大幅度的压缩,音质及音效都大打折扣,难以接受。因此,电台广播仍是最佳的免费音乐来源。


  ◆调谐器研发费用高昂


  环顾今日的音响市场,专门制作CD机、扩音机及扬声器的厂家多如牛毛,但专门研究及开发调谐器的厂家却有如凤毛麟角。主要原因是调谐器的市场不大,但开发与研究的费用却相当惊人。上一世纪60年代,胆机中的至尊Marantz便是因为开发胆调谐器Marantz10B而债台高筑,最后导致公司易手。

  真空管调谐器是许多发烧友苦苦搜寻的目标,目前除了Magnum Dynalab的顶级调谐器MD-108使用了真空管之外,其他厂家都不生产真空管调谐器。无奈的是,MD-108调谐器的售价高达5850美元(约1万新元),实在难以奉陪。即使退而求其次,向二手真空管调谐器下手,一部古董Marantz 10B的售价也同样高不可攀,而其他品牌的真空管调谐器也是同样少见,状况好的更是可遇不可求。

  多年来,我一直在使用来自加拿大的Magnum Dynalab Etude调谐器。Magnum Dynalab是当今调谐器厂家中的佼佼者。最近,Magnum Dynalab推出了全新系列的调谐器,其中多个型号都使用了真空管,对于无胆不欢的发烧友,是个大好消息。

  MD-90调谐器是Magnum Dynalab MD系列中最“便宜”的一部,订价为1800元。在MD-90的面板上,有三个巨大的指示表以及一个液晶(LED)数字显示屏;面板的左边,整齐地排列着各种功能选择挚;面板的右边则是一个巨大的调频旋钮,散发着强烈的专业色彩。



  ◆MD-90其实非常易用


  乍看之下,MD-90似乎非常专业复杂,其实却非常易用。选台时,只需转动调频旋钮,液晶显示屏上的频段数字便会开始跳动,直到所要的波段为止。接着,再微调旋钮,当面板正中的“调谐”(Tuning)指针处于零(正中)的位置时,便表示接收准确。右边的“讯号”(Signal)指示表,则显示接收讯号的强弱,数字越高,讯号越强。虽然指示表的最高读数为10,但厂方声明为了保护指示表的机件,指针是不会达到10的位置。面板左边的 Multipath表则显示讯号的清晰度,当指针不在零的位置上时,表示电台讯号受到干扰,可移动或旋转天线直到指针处于零的位置为止。

  我正在使用的Etude是一部晶体管调谐器,而MD-90则属于真空管调谐器,它主要是在音频线路上使用了两枚6922(6DJ8)真空管。两部机虽然师出同门,在测试时,难免将两部机放在一起火拼,一较高低。

  我所使用的是室外天线,绝大多数电台的讯号都接收得非常理想;无论用Etude或MD-90,清晰度及灵敏度都达到很高的水平。



  ◆未能克服真空管的缺点


  论价位,Etude在MD-90之上,价格也比MD-90高。但相比之下,使用真空管的MD-90,音质却比Etude更讨人喜欢。它的高频开扬,空气感及空间感出色,无论听音乐或歌曲,都更有音乐味及更令人投入。反观Etude,音响则显得较为压缩及平淡无味。

  当然,针无两头利。MD-90虽然具有真空管的优点,但也同时兼收并蓄了真空管的缺点——讯噪较高比。虽然6922真空管的噪音已经较低,但还是不如静如深海的晶体管。一得必有一失,自古皆然。

  发烧友一般都拥有不少CD,但常听的却往往只有少数几张。听广播则海阔天空,完全免费而又不必费心,并且常有意外的收获。在夜阑人静的时候听古典音乐台,轻柔抒情的音乐,配上胆味盎然的音响,满室生辉。