希望M1的耳放板计划也公布一下

HiFiMOD

楼主别急，已经在做，月底前出来，如果你在M1群的话请留意

hifidiy

感谢建议,未来设计会考虑不计成本采用运放建议！

嘿嘿
大家买的是感觉还是声音？

如果感觉什么运放爽，建议直接更换！或者搞个清单，我们照着来？要是10个人十个配置，嘿嘿！

用5532的有歌德的RA1，傲立的MDAC，还有上万的MBL6010的5534

耳放输出部分用因为是OP+BUF框架，所以采用双极性大电流运放配合三极管输出，我们测试了5种运放组合，最终定型前端LPF部分OPA系列+耳放5532A+BUF，整个M1是具备调音的，AEON和J版亲自对所有运放校准确定的，不是脑袋一热就随便装的！

mobyhyde

解码耳放版多花点成本是应该的。。提升档次

crazypeanut

不是说M1结构很精密，不建议我们私拆嘛？？那可换耳放解码不就矛盾了？？

vinbool

M1高阶版也是这个运放不是吗？

所以，感觉lz多虑了。

hifione

crazypeanut 发表于 2014-7-13 21:48
不是说M1结构很精密，不建议我们私拆嘛？？那可换耳放解码不就矛盾了？？

已经私拆了，就是里边卡的有点紧。。。直接撤掉了几个电阻！自己焊回去了。。。建议私拆时小心些

Julien

"Don't underestimate the NE5532. We have just completed a very comprehensive set of tests on the NE5532 and on various substitutes. We have not found anything that will equal the tranparency provided by the NE5532.
Some have suggested susbstituting OPA2134 op amps in place of the 5532s. This is a bad idea! Our tests show an increase in both 2nd and 3rd harmonic distortion, and the addition of higher order (4th, 5th, 6th, and 7th) harmonics that are virtually absent from a stock DAC1. In addition, IMD will increase, and SNR will degrade.
The NE5532 is power hungry, it has high input bias currents, and high offset voltage, but it can drive high-level low impedance circuits with ease. The 5532 should not be used with low signal levels, and it should only be used in low gain circuits. Also, the offset voltage must be managed with appropriate design techniques. I believe the NE5532 has aquired a bad reputation because it has often been missapplied. The DAC1 is carefully designed specifically for the NE5532 op amp. It may surprise you that the NE5532 was selected for transparency and not on the basis of cost."

原文：http://wiki.benchmarkmedia.com/wiki/index.php/NE5532_Opamp

antony55

只要声音好！管他用什么运放，以价论声的话，HIFIDIY还有什么乐趣？