Preamp: a device that allows some tone shaping and gain (volume) control of the signal from your bass guitar. No amp.
Head: an amp with a preamp built in.
Combo: an amp with a preamp AND a speaker built in.
Powered cabinet: a speaker in a speaker box that has an amp built in, no preamp.
Cabinet: a speaker installed into a speaker box, no amp or preamp.
Head: an amp with a preamp built in.
Combo: an amp with a preamp AND a speaker built in.
Powered cabinet: a speaker in a speaker box that has an amp built in, no preamp.
Cabinet: a speaker installed into a speaker box, no amp or preamp.
