I am a complete neophyte in recording, so I am very poor in theory. I am thinking of buying some hardware for some home recordings and I am faced with the first choice: the audio interface.
Since I will mostly record voice + acoustic guitar (so one mic and one inst) I see there are a lot of interfaces I can use since all of them support at least two inputs, but I will occasionally need to set one extra mic, so I was thinking to be focused on an interface which has more than just two inputs. I am for example evaluating the Focusrite Scarlett 4i4, and many others that have two line level inputs, so I am wondering if occasionally it will be fine to plug in the electrified acoustic guitar to those line level inputs (while connecting two mics to the frontal inputs).
I have a Taylor GS Mini-e with a ES-B pickup/preamp, I have not found information about its impedance. I even don't know what impedance is. I just know that it is something related with the output voltage (maybe??) and I know that the GS Mini ES-B has two CR2032 batteries of 3V, so a total of 6V output voltage.