This compact aluminum baffle/enclosures are identical to the 410 Series with the addition of a circular mounting canopy complete with mounting hardware and second grille to enable bi-directional sound dispersion. Model 510-8 mounts a standard 8" (203mm) loudspeaker (will not work with 8W Transformer). Aluminum housing is patch-jute lined and undercoated to allow clear, audible loudspeaker performance by preventing mechanical and acoustic resonance. One grille per unit includes studs for convenient loudspeaker mounting. Complete assembly installs to a 4" (102mm) octagon E.O. box (by others). Finished in satin brushed aluminum.