1. Upgrade upsampling module before signal to PCM1732.
(we have 24bits/96KHz upsampling provide)
2. Change 4 E-cap from Elna MUSE to Blackgate. Also that 2 large 3300uF.
3. Low pass filter capacitor --> Silver Mica
4. Op-amp --> NS LME49710. (more musical than OPA627).
You can soldering a socket inside of PCB, we have OPA627BP and LME49710, you can AB comparision.
5. Resistor --> Dale or RMG depends on your budget. But sure is not using the cheap cheap default resistor.
作者: t.kaiming 時間: 2010-11-10 22:36
thank you! kk sir
即係可以代替OPA604AP同NE5532AN嗎?作者: kk_ho 時間: 2010-11-11 01:55
OPA604 --> Single OP-AMP
You can soldering the IC socket and take your machine to hififever to do a AB comparision test.作者: t.kaiming 時間: 2010-11-16 12:48
加咗個鍍金IC座作者: kk_ho 時間: 2010-11-16 12:51
Good, you can take your machine to hififever (suggest at coming SAT), I can demo the diff of OPA627 and LME49710 to you.
Also, we have ELNA Silmic II, Nichicon KZ, Sanyo OS-CON, Nover capacitor in stock for your modification.
Please confirm you can come this SAT or not.作者: t.kaiming 時間: 2010-11-22 22:10
sorry! 嚟唔到, 我已買咗OPA同caps嚟犘作者: jastudio 時間: 2010-12-6 15:50
刚刚拿到 49710。。。 好正。。。
数据没有627好, 但一听好像更平衡,更有音乐感。。。作者: t.kaiming 時間: 2010-12-11 19:03
嘩宜家暫時換咗WIMA電容DALE電阻同兩粒OPA627以有好大改善 遲D咪作者: kk_ho 時間: 2010-12-17 16:49 本帖最後由 kk_ho 於 2010-12-17 17:06 編輯
For me, I perfer use SILVER MICA for output buffer, and low pass filter stage..作者: t.kaiming 時間: 2011-1-9 17:00
silver mica 貴唔貴? 同係邊幾粒呀?作者: kk_ho 時間: 2011-1-9 19:22
你告訴我參數,我報价俾你。
還有,有訂造R-CORE牛供應。