Otop 15 Comp Horn Flat Pack

Otop 15 Comp Horn Flat Pack

Jack Cutout
Jack Plate/ Handle Cuts (+ USD $10.00)
No cuts.
Assembly Option
Flat Pack
Assembled, sanded, routered with 3/8 roundover, ready for finish (+ USD $300.00)
Price: USD $249.95
  • Description
  • Specifications
  • Kit Contents
  • Related Items


The Otop Series are the easy to build high output models of Bill Fitzmaurice Designs.

  • The OTop 15 may be built with a single compression driver on a CD horn,
    or it may be built with a six element vertical tweeter array for
    line-array stacking of multiple cabs.
  • The OTop 15 may also be built with a twelve element cross-firing melded tweeter array,
    giving high frequency dispersion that no commercial PA top can match.
  • For the highest possible output at the longest throws, build yours with a premium compression driver on a line arrayable full cabinet height horn.
  • Also available in a J array trapezoid cab. The same kits fit both tradtional and trapeziod
  • One of our most popular kits

Complete details and plans are available from


OTop 15 Series DIY Pa Speaker Cabinet Kit

  • Dispersion with Piezo melded arrays:        120 degrees
  • Dispersion with  Diffraction Comp Horn: 100 Degrees
  • Power handling: Driver dependent. See options in drop down box for driver selection
  • Response:  50-18k
  • Dimensions: 22in x 22in x 18in
  • Weight: Approx 45-50lbs, dependent on driver and hardware.

Complete details and plans are available from

Otop 15 Compression Horn Flat Pack

  • Baltic Birch 1/2 plywood precut for easy assembly
  • All the small complex parts are done saving enormous time in building.
  • There are some cuts that must be made as the cabinet is assembled

Please allow 10-14 business days for delivery.

1 1/2 Acoustic Eggcrate Foam
Duratex Roller Grade Gal Black
Hat 1 3/8 Cast
Hat 1 3/8 Cast
Price: USD $10.49
PL Premium 10.6 oz
PL Premium 10.6 oz
Price: USD $4.89
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