This established reverb in guitar amps from that time forward.

You sure you guys don't want a guitar amp or something?

The role of an electric guitar amp is completely different from the amplifier in a stereo system.

What do you expect from a guitar amp?

When asked what type of guitar amp Lennon would like to use for the performance his answer was "One that plays".

They also made phonograph amplifiers that are now used as guitar amps in some cases.

We had a guitar amp, and someone was always telling us to turn it down.

During the recording, one of the guitar amps blew up (which is evident on the album track).

And I need to buy a new guitar amp.

Musicians often run sound-sources other than guitars through guitar amps.