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I’ve read a post from a famous AD1955Pro DIY website:
"当OPA2604换上OPA2107,改变最明显的是感觉频响展宽了很多,高低频两端延伸好得多, 同时也试了5532声音比OPA 2604略干,缺少甜美, 声音最好的是OPA2107,是其它双运放远远不能及的. 当然它的价钱也最贵.
OPA2107的速率18v/us,增益带宽4.5m,用在I/v转指也好,模拟输出也一样,感觉高低频两端延伸非常好,特别是低频的弹性和解析力都相当优秀.”
In order to prove the result is true or not, I used $150 to buy a pair of TRUE OPA2107 to compare with default 5532 and another pair of OPA2604. After power on the DAC and played 2 songs, my wife said "So far this is the best sound every heard from your Hifi system". My personal comment is the same as the guy posted, very happy!! :
OPA setup: 627BPx 4, AD797AN x 4, 2107 x 2
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