You can directly plug a microphone into an acoustic guitar amp, but not electric guitar amps. To plug a microphone into an electric guitar amp, it first needs to go through a multi-effects pedal or suitable preamp.
Likewise, people ask, can a guitar amp be used for vocals?
But other than that, yeah it works fine. It’ll work and not damage the amp. However it will sound like crap due to the electronics of a guitar amp and how it’s designed to interpret a certain type of signal. Better amp choices for vocals are keyboard, bass and acoustic amps.
Moreover, how do I connect my vocal mic to my guitar amp? To plug a mic into a guitar/bass amp, we need to adapt the mic cable to a TS (tip-sleeve) connector and insert the TS into the amp input. Note that TRS would also work but is not the ideal connection. If using an active mic, ensure a power source is put in-line between the mic and amp.