The movement of the plate changes the capacitance. That amp has the ability to connect to a computer through a USB connection. Sound pressure moves one of its plates. In the electret microphone a slice of this material is used as a part of the dielectric of a capacitor in which the diaphram of a microphone forms one plate. Therefore, a microphone always requires a preamp that amplifies its low level output to line level. This is because a microphone alone, without an amplifier, produces very small electrical signals. I’m assuming your amp does not have a preamp/mixer stage and you do not have access to a mixer unit. Connect the preamplifier/mixer mono output to the mono input of your amplifier. The only problem is that the cord won't plug directly into my amp(s). Most audio interfaces already have built-in preamps, which … I have a couple practice amps for my guitar(s) and just bought a microphone and cord. We could talk for days about choosing microphones for different applications — if you have a choice, practically any dynamic microphone is a good place to start when miking a guitar amp. The electret capacitor is connected to an FET amplifier. This way, if the signals recorded by the microphone are too faint or low, we can provide decent amplification to them so … How to Connect Your Microphone to an Audio Interface Microphones typically produce fairly low output levels. In this project, we will go over how to connect a microphone to an amplifier circuit so that we can amplify the sounds recorded by the microphone. You could also hook the pre-amp to a computer's line in if you wanted, though most already have a microphone input, so I'm not sure why anyone would want to do that. If we connected the output sound signals from a microphone directly into the pin of an arduino, the board wouldn't be able to detect any meaningful signal, since it is so small. Can someone offer some advice on how to hook up my microphone to my amp(s) without buying a new system? Best option in this case is to get a small mic preamp like the M-audio AudioBuddy. Choose your microphone. The USB connection will allow you to record the audio signal from the amp into recording software (DAW) with effects. No mic needed and the cabinet emulation may bring it close sounding like it was micced. But a microphone alone is insufficient for this circuit. If there is no mono input on your amplifier, you may use the left channel of the amp to drive both speakers (assuming you have enough power in the amp) or "Y" the Left and Right inputs to the amplifier. You just need an ordinary stereo RCA cable to connect the pre-amp to your amplifier, the same as you would for connecting your CD player or tuner etc.