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是否可以修改組合放大器,以便線路輸出不會使揚聲器靜音?

I'm considering this small bass amp, primarily for practising at home: http://www.amazon.co.uk/Vox-PATHFINDER-Combo-Bulldog-Speakers/dp/B002YC36ZI

一些人說它也適用於小型場地或舞臺上,但它具有通常的練習功能,插入線路使主揚聲器靜音。這對於在舞臺上使用它無益,您可能希望將放大器用於舞臺聲音並將線路輸出到混音臺。當然你可以麥克風,但我們傾向於不為低音放大器做那個。

我確信這會因放大器而異,但是有人可以給出明智的意見/有根據的猜測這些類型的放大器是否適合簡單的修改,例如禁用靜音練習模式?它是否可能是一個非常簡單的電路(斷開電線)或某些計算機控制的芯片/電路板,這使得這是不切實際的?

最佳答案

Many bass amps have a DI output (XLR jack), which, unlike a line out, is actually intended for routing into a live mixing console. For bass amps which don't have this, it's actually often best to use an external DI, entirely before the amp. You also lose preamp sound shaping then, but whether the Pathfinder actually does anything useful to the sound there... I'd have my doubts. – In fact, some live engineers prefer putting their own DI in front of even a high-quality bass amp, because this way they have better control of how the bass will sit in the mix.
For bass you don't need a top-notch DI, but a decent active one would be a good investment.

That said, this kind of plug-in-mute switch is indeed a very simple circuit that you can easily disable yourself. It is usually implemented as an extra contact which doesn't contact the plug, but the T contact – but only if no cable is plugged in.

Jack bypass switch

要禁用,只需將此聯系人永久保留。

請註意,使用線路輸入進入調音臺可能無論如何都不能正常工作。對於麥克風輸入,此輸出實際上沒有正確的阻抗,並且它不平衡,因此您可能會得到電源嗡嗡聲。使用DI可以避免這種情況,但......正如我所說,你最好在放大器之前完全使用DI,那麽問題就不會出現在第一位。


Voids warranty, of course.

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