Guitar Amplifier is the device which amplifies the signals from the guitar pickups to be projected at loud volumes.
Amplifier Cabinet is a speaker which is required to be connect to a guitar amplifier to project the sound.
Guitar Combo amplifier is a single unit with both the amplifier and cabinet in one.
Tube amplifier is an electronic amplifier which uses vacuum tubes to increase the power/amplify the signals.
Analog amplifier is an amplifier which uses analog circuitory and not a digital one to ampify/produce it's sound.
Amplifier head is only a device which amplifies the guitar signal to the required volume. It needs an external cabinet speaker to be attached to project the sound.
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