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Simplexx 15 Flat Pack Subwoofer

Assembly Option
Flat Pack
Assembled, sanded, routered with 3/8 roundover, ready for finish (+ USD $200.00)
Price: USD $249.99
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Simplexx 15 Subwoofer DIY Speaker Flat Pack

The easy to build high perfomance subwoofers by Bill Fitzmaurice

Kit Contents

Simplexx 15 Subwoofer Flat Pack

The Simplexx 15 flat pack kit gives you precision precut plywood needed to build your cab. 

  • Baltic Birch 1/2 plywood precut for easy assembly
  • All the small complex parts are done saving enormous time in building.

Please allow 10-14 business days for delivery.

Complete details and plans are required from

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Shipping & Inventory Update

Shipping will be closed from Dec 22 through Jan 8th.  Happy Holidays!

Please email about any order that includes drivers for availability. 

 Business is booming, and flat pack and shop built orders are once again stretching lead times. Plywood availability is becoming an issue.

Expect at a minimum of 4 weeks for any shop built order.  6-8 weeks for custom flatpacks.  We are not accepting custom built cabs at this time, only flatpacks and fEARful/ Fearless bass cabs.