ckfok 發表於 2008-11-13 16:07:19

想請教: 合拼amp 可否改成後級amp呢?

小弟想將部luxman A-382合拼amp 改一改,bypass前級部分後是否成為純後級呢?

看到內部的線路後,發現有灰色膠包着的訊號線,把三條線干於新的RCA socket上,有聲出,但只是前級扭小小,已非常大聲,而且還有唔唔聲添,不知有沒有方法解决大聲及唔唔聲的problems.
小弟是新手,希望高人指點。 :) 謝謝!

kk_ho 發表於 2008-11-14 09:04:44

Re: 想請教: 合拼amp 可否改成後級amp呢?

yes, it can

from your photo

left hand bottom side : input,

left hand top side, volume control.

At the middle area, found some op-amp buffer (SIP-9 package may be)

Skip the volume and input buffer. Then feed the signal after the op-amp, that is

Most have 1 capacitor coupling between opamp and power amp stage.

Remove it and feed into is simple

ckfok 發表於 2008-11-14 13:34:32

多謝師兄指教,但甚麽是"opamp", (小弟是超新手),煩師兄指教。

ckfok 發表於 2008-11-14 13:39:05

還有師兄提到需拆去的是"opamp" or "capacitor"?
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