RyanPKenny

Hi guys ive go this Aria Pro ii 5 string bass but i dont know what model it is i can't find it anywhere and anything i see only has 4 knobs in it but mine has 5 so im not sure if something has been added to it or if im just looking at the wrong one ill get some pics up and if someone could let me know would be good i cant find a serial number on it but i might not be looking in the right place is it under the plastics on the back ? Pictures have been attached if you want pics of a certain part just ask and ill try get one loaded Thank You