大家看看这个美国产便宜单路前置放大器，可改便携吗？

w7x8x

http://www.amazon.com/ART-Tube-Studio-Mic-Preamp/dp/B0002E50MC/ref=sr_1_fkmr0_1?ie=UTF8&qid=1302765508&sr=1-1-fkmr0

Product DescriptionFrom the ManufacturerTube MP – Studio Overview The original ART Tube MP put professional-caliber tube preamplification into the hands of thousands of musicians and recordists who wanted great tube tone. The new ART Tube MP Studio features ART's "OPL" Output Protection Limiter, which precisely and accurately controls and maintains the output peak signal. The OPL circuitry is crucial in protecting the next link in a signal chain - such as a hard-disk recording system or a sound card. The Tube MP Studio goes even further, with the inclusion of a VU meter for observation and measurement of the unit's output level, which enables the user to keep his signal consistent with desired levels. The meter also reflects the impact of the OPL circuitry on the signal. For example, if the signal is "in the red" on the meter, the meter will reflect the attenuation of the signal when the OPL is activated, and the signal is brought out of the "red". The Tube MP Studio is the only Mic Pre in it's class with sophisticated metering and OPL functionality. These features alone can add hundreds of dollars to the price of a processor The Tube MP Studio can be used in a wide variety of applications including recording, project and home studios, where it's metering functionality and OPL circuit really shines. It also functions as a direct box, with impedance matching and preamplification for line-level sources. The ART Tube MP Studio's performance exceeds that of units costing many times its price... and it's unique combination of features and flexibility will make it a must-have in any audio toolkit. Tube MP – Studio Features:

• Provides Superior Preamplification for: Microphones, Instruments and Line Level Sources
• Analog VU Meter
• OPL™ Output Protection Limiter
• Hand-Selected 12AX7A Vacuum Tube
• Variable Input and Output Gain Controls
• Provides over 60 dB of Gain
• +48 Phantom Power Switch
• Phase Reversal Switch
• XLR and 1/4" Inputs and Outputs
• Portable, All-Steel Construction
• Excellent as Tube DI
  

Product DescriptionThe original Tube MP made pro-caliber tube preamping available to ordinary musicians and home studios. The MP Studio goes a step further by adding a VU meter for better level control and ART's OPL (Output Protection Limiter), which controls and maintains the output peak signal to protect hard-disk recording systems and soundcards. The VU meter reflects the impact of the OPL circuitry when it is activated, which allows more effective fine tuning of the audio signal. It is a valuable tool for recording in project and home studios and can also function as a DI box with impedance matching and preamplification for line-level sources. Includes a 3-year warranty.

看电源输入：9VAC，这个交流便携电源不如直流方便取得。

就有一组输入，一般用也就够了。

请懂行的的看，这个前置放大器个人用怎么样？

虽然好多前置放大器功能比这个强，但价格也比较贵。个人利用率不高，所以讲究个性价比，就是闲置了也问题不大。





该贴已经同步到 w7x8x的微博

signscity

我看有人改为9伏电池供电。估计要打开机壳，去掉整流和滤波电路。这个自己可以提供48伏幻象电源给电容话筒。增益也不错，可是我找不到输出阻抗是多少？我看了另外一种 70多的是600欧 。你打算做什么用？

signscity

8-2

这个8路输入2路输出也只有40多。供电是用它自己的交流输入。我估计也可以改为直流供电。

w7x8x

回复 signscity 的帖子

就是给指向性抢麦提供一个幻象电源和简单调整dB等参数用，而且看着也轻一些。

signscity

ART Tube MP Microphone Preamp
by ART
这个19。99。就是没有表。

blacker

最主要的是它不能发千周信号。