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Multiple Audio IN

Suraj143

Active Member
How can I connect both 3.5mm audio out (mobile phone out) & the echo out to a PRE Amp IN?
*Note that echo circuit out is a mono..!

Thanks
 

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Suraj143

Active Member
The problem is the 3.5mm out comes from smartphones or laptop or MP3 player out. Its an external line IN. So Do I need an opamp?
 

Nigel Goodwin

Super Moderator
Most Helpful Member
The problem is the 3.5mm out comes from smartphones or laptop or MP3 player out. Its an external line IN. So Do I need an opamp?
I don't see what your problem is? - of course outputs go to inputs - if you want an active mixer then use an opamp, but from headphone outputs you might have enough signal to use a passive one.

Have a look here:


An active 'virtual earth' mixer is always better, but you could try the passive one with just pots and resistors
 

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