Abstract: A module for removable insertion into a stringed instrument body, the body having a transverse cavity extending from a lateral edge. A first fixation device is attached to the body in the cavity and having electrically conductive contact members. The module includes a base configured to engage the cavity as the module travels along an axis of movement into the cavity. The pickup module assembly having a base slidably inserted into the cavity along an axis from the lateral edge between removed and inserted positions. A plurality of pickups are carried by the base in operative proximity to the strings. A second fixation device is attached to the base and positioned to slideably engage the first fixation device when the base is in the inserted position. First and second electrical connectors are electrically coupled to the plurality of pickups and connected to the second fixation device.