Device for setting up a
loudspeaker housing, comprising (a) an elongated foot bar (1) which can be attached to the front and rear walls of the
loudspeaker enclosure. (b) Fastening means (4) which force-fit the foot bolt to the front and rear wall and optionally provide a positive engagement in a
transverse groove (3) of the front and / or rear wall, (c) wherein the fastening means engage screw-typely on countermeasures arranged in the housing structure, in particular on (i) a transverse nut (5) in the side wall of the housing, and / or (ii) Threaded inserts or counter-screw parts in the front or rear panel, (d) a threaded stud (6) with external thread which is screwed into a fine-thread internal bore of the foot bolt and which is adjustable from above by means of a drive engagement, (e) wherein the threaded pin has a
conical surface (6a) on its outer side as a contact surface and a ball sleeve (7) inserted into the base is arranged below the pin, which accommodates three balls (8) on a circumferential circle with 120° divisions, (f) wherein each sphere is in contact with the
conical surface, a base support of the sphere sleeve and a cylindrical inner wall of the sphere sleeve, (g) wherein the ball sleeve (7) is encapsulated and sealed and forms a
lubricant reservoir (10), (h) wherein the force flow into the foot rail, when loads occur about the
transverse axis, passes through the side walls, provided that the countermeasures of the foot rail fixing screws include a transverse nut in the side wall. (i) wherein the ball sleeve has an outer
diameter D in the range of 10 mm to 20 mm and the ball diameters d K are chosen proportionally to D with a ratio of 0.30 ≤ d K / D ≤ 0.35 (j) and wherein the threaded pin has an axial internal thread for receiving a countersunk screw of
nominal size M3 to M5 (11) acting from above, by which the pin is clamped against the foot bolt.