In the 80's Peavey made a electric case which includes a built-in, 10-watt practice amp with Lo-gain and Hi-gain inputs, three control knobs for pre-gain, post-gain, and EQ, for the T-15. Has anyone ever seen a electric case for a bass? 057912
Silvertone did it. I don’t think it makes sense for bass. Google Image Result for https://www.premierguitar.com/ext/resources/archives/6e552ce6-f04e-4ae1-a0b4-2b94b0b606c2.JPG?t=1502216447&width=600