Tube Combo Guitar Amp from Mad Professor
Mad Professor will soon release a new version of its Old School 21 guitar combo.
![[NAMM] New version of the Old School 21 combo](https://img.audiofanzine.com/img/product/normal/2/0/201940.png?fm=pjpg&w=334&h=243&fit=contain&s=e801c71adab1d3594200dcc2bb998841)