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 Max Cochran   Canada Flag   To email Max, type out the email address.

Lyeco LY802F Aperiodic Enclosure

This is my entry for the Lyeco LY802 Full Range Contest, an Aperiodic speaker enclosure.

Items needed:

  • Pair of Lyeco LY802F drivers.
  • One 5' x 5' sheet of 18mm Baltic birch plywood.
  • A few inches of 3" plastic pipe.
  • 1 lbs polyester stuffing.
  • Dense open-cell foam, an old sock, felt, whatever, to cram in pipe.
  • Binding posts, wire, spikes, soldering iron, (table) saw, router, glue, clamps, etc..


  • Set table saw fence at 9.75" and cut the plywood twice across the face grain then 6 times with the grain. This will leave you with eight 9.75" boards, 6 at about 40" and 2 at 5' long.
  • Cut the two long boards to match the others.
  • Cut four 8.25" x 9.75" pieces from the leftovers for the top and bottom.
  • Take the two nicest looking 40" pieces with the grain lengthwise and rout out the driver holes 6.5" from one end.
  • In the two 40" pieces with the grain across the board, rout/ drill holes for binding posts at whatever height you prefer.
  • Pick the two ugliest of the 8 x 9.75" boards and rout holes large enough (3.5"?) to snugly fit some 3" pipe. These will be the bottoms.
  • Cut two 1.5" sections of pipe.
  • Glue up the cabinets, such that the front baffle and back sandwich the sides and top. The finished cabinet will be roughly 9.75"W x 11.25"D x 40"H externally. (8.25" x 9.75" x 38.5" internally).
  • Fill each cabinet with 0.5 lb stuffing (roughly 0.3lb/cu ft).
  • Hook up the drivers.
  • Stuff the ports.
  • Enjoy!

Okay, I skipped a few details, but you get the idea. The enclosure plan is shown below.

Lyeco LY802F Aperiodic Enclosure Plan
Drawing 01: Lyeco LY802F Aperiodic Enclosure Plan

This design modelled the closest to an infinite baffle as I could get with a reasonable size (and a single sheet of BB!). Nice and smooth FR, with an F-3 in the mid 60s.

Calculated Frequency Response - Lyeco LY802F Aperiodic Enclosure
Figure 01: Calculated Frequency Response - Lyeco LY802F Aperiodic Enclosure