liudf 发表于 2007-7-3 10:19

有人仔细比较过OPA2132PA、OPA2134PA、OPA2604AP吗?

请问单就效果来说谁好?谁的声音更接近LP(平衡、自然、高分析力,有味道)?三者音色走向如何?
从TI/BB的规格书来看:OPA2134PA和OPA2604AP似乎是音频专用的,而OPA2132PA则是通用的。这是否能够说明OPA2132用于音频不如OPA2134和OPA2604?

小龙 发表于 2007-7-3 10:40

整体感觉好的是604
134是偏暧一些的风格。
132在低压应用不错,15V供电下没同134和604比都没优势

liudf 发表于 2007-7-3 10:56

引用第1楼小龙于2007-07-03 10:40发表的 :
整体感觉好的是604
134是偏暧一些的风格。
132在低压应用不错,15V供电下没同134和604比都没优势
有人评价OPA2604AP的低音太肥(类似于NE5532),高音暗淡;OPA2132PA高频过亮,有毛刺感。请问真的是这样的吗?OPA2134PA高频如何?有无毛刺感?

lqh 发表于 2007-7-3 11:21

俺的感觉2604低音要做出弹性较难。高音到不觉得暗(低阻耳机)

数码发烧友 发表于 2007-7-3 12:37

很好比较,这些都是音频专用的,一分价钱一分货

liudf 发表于 2007-7-3 13:25

引用第4楼数码发烧友于2007-07-03 12:37发表的 :
很好比较,这些都是音频专用的,一分价钱一分货
OPA2132好象是通用的。请问三者音色走向相同吗?有人说OPA2132是从OPA2134中精选出来的(从DATASHEET上看OPA2132P是从OPA2132中精选出来的是毫无疑问的),这种说法对吗?谢谢!

liudf 发表于 2007-7-3 13:27

以下是TI的工程师(中国人)对这个问题的回复:
First, I will explain there wasn't defect device in TI. The differnce between device is based on the performance level. For your description about OPA2132 and OPA2134, OPA2134 is design especially in Audio appilication. However, OPA2132 is ideal for general-purpose, audio, data acquisition and communications applications, especially where high source impedance is encountered. That's why OPA2132 is more expensive.

Besides, as for OPA2604 andOPA2134 in proconsumer application:- Please use OPA2604 - it has a slew rate at 25V/usec however the price performance is more expensive. Thus using inverting amp and intergrator for summation is a good application. For OPA2134 - it is meant for general consumer application - thus it has a slew rate at 20V/usec sufficient for the correct bandwidth performance at 20KHz.

The difference between the OPA2132P and OPA2132PA can be found on page 2 of the datasheet. The 'A' represents the performance grade of the part. 'PA' has a tighter spec than the other which makes it a higher performance. The OPA2132P is active and recommended for new designs. The OPA2132PA is active but referenced as low volume.

Summary, OPA2132 is best for many application. OPA2604 is better than OPA2134 in Audio application. It all depends on your cost and performance consideration. Hope it answer your question clear.

tonycheung 发表于 2007-7-4 01:08

貌似LS的解答不错。。。。。。。

蓝子风 发表于 2007-7-4 03:55

想想莱曼用的是哪颗OP呢?

其实这3颗OP都可以出好声的。就看你的调声手段了

tonycheung 发表于 2007-7-4 13:33

莱曼用OPA2134。。。。。。。。

paul979 发表于 2007-7-4 15:00

我找到一块板上面有两只OPA2134PA的运放好像是莱曼上用的

j8283in 发表于 2007-7-4 15:49

2604 声音通透暧和,很不错

j8283in 发表于 2007-7-4 15:55

OPA275 比 OPA2604 声音浊一点,层次感都差点,
25块的价格还是挺划算的

zhke 发表于 2007-7-4 16:15

引用第11楼j8283in于2007-07-04 15:49发表的 :
2604 声音通透暧和,很不错
听一批大大说2604也不"海阀"...

龙虎豹 发表于 2007-7-4 17:53

都可以呀

make_true 发表于 2007-7-4 17:57

做比较都是在同一个电路做出来的,OP们被强行押上刑台,紧张的腿发抖,哪有人想过他们想要什么刑台啊

zhke 发表于 2007-7-4 18:07

引用第15楼make_true于2007-07-04 17:57发表的 :
做比较都是在同一个电路做出来的,OP们被强行押上刑台,紧张的腿发抖,哪有人想过他们想要什么刑台啊
啥刑台腿也抖啊!!~~

make_true 发表于 2007-7-4 18:10

砧板!
杀鱼用的~~~~

ej124 发表于 2007-7-4 18:27

受此帖启发 刚订了LM4562HA OPA2134PA AD8620BR各一块...

zhke 发表于 2007-7-4 18:42

OP的进步速度远远大于整机的进步速度了...
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