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就有关唱放问题请教? [复制链接]

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1#
[upload=jpg]Upload/20062231092438049.jpg[/upload]

打算换里面的IC,原来为台湾版的5532,准备上陶封OPA2604。
看了说明书的介绍,好像该运放只负责MM部分放大,问题来了,
我是用MC唱头,按线路设计,更换IC后MC部分会有提升吗?是否该运放也牵涉到MC放大部分?
知道及用过该唱放的朋友指点指点!

以下为唱放说明书:
Jasmine LP1.0 Phono Stage
Jasmine LP1.0 was born from a deep understanding of LP culture and electronic technology. The result of this is our phone stage. The Jasmine LP1.0 was designed with a succinct circuit topography to deliver superlative performance. People are rediscovering the magic of LPs. We encourage you to review the feedback from our users. This is an outstanding phono stage, regardless of price . However, you will find the accessible price tag a welcome relief. There is no longer an excuse for not enjoying your favorite vinyl.

Download: Jasmine LP1.0 brochure
Sealed power transformer isolates any electromagnetic interference.
A940/C2073, A1015/C1815 for regulation.
two 5532 for MM amplification.
Patented, proprietary circuits for MC stage.


Gain @1KHz: MM / Low-Gain = 36dB, MM / High-Gain = 42dB;
MC / Low-Gain = 56dB, MC / High-Gain = 62dB.

RIAA EQ Distortion: 0.5dB ( 20Hz to 20KHz ) THD: < 0.01 ( 20Hz to 20KHz )
Output Level: 2v S/N: MM > 88dB , MC > 79dB
Input Impendence: MM = 47K ohm , MC = 100 ohm Input Capacity: MM = 100PF , MC = 1000PF
Power Consumption: 6 watts ( max) Dimensions: 112 x 210 x 64 mm / 4.4" x 8.2" x 2.5"
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2#

这台唱放在用作MC放大的时候,换运放的效果不如更换机内接线效果明显。
因为空间的关系,进入机内的电源线离MC放大部分过近,而且接线不带屏蔽,对声音有负面影响;而且这部唱放耗电量很低,保险丝可以考虑废除。
经过以上的简单改动,这台唱放的效果会有出人意料的提升。
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