Abstract: A loudspeaker enclosure is disclosed that includes a plurality of exterior panels enclosing an air volume and a first brace disposed within the air volume and comprising a first reentrant through opening shaped to closely follow a profile of loudspeaker assembly components within the enclosed air volume. A loudspeaker enclosure is disclosed that includes: a plurality of exterior panels enclosing an air volume; at least one loudspeaker coupled to a front exterior panel; a first brace disposed within the air volume and comprising a first reentrant through opening; a second brace disposed within the air volume and comprising a second reentrant through opening; and a third brace disposed within the air volume and comprising a third reentrant through opening. The first, second, and third reentrant through openings are shaped to closely follow a profile of loudspeaker assembly components within the enclosed air volume.