DE ANTE HAND THANK YOU FOR AVER VISIT MY QUESTION! my problem is that I have a computer and audio zony mhc gtx888 and nothing works already I have taken it to repair 2 times and still do not give the fault. looking on the internet and on this page I got that I can use its part of amplification I saw some forums and videos of how to do it and can energize the plate where the stk goes but when installing a vocine (cornet) towards a sumbido too strong in such a way that I I burn the vocine I imagine that it happened by a high voltage! then as I do not know much of electronica or how to verify that is what is wrong in the circuit I would like to use the 2 stk it brings to make my own amplifier that works with a pla (aux) to use it with my phone and my pc and yes it is possible to put an input for a microphone this would be to install my guitar