Tuba 30 12" DIY Folded Horn Subwoofers

by Bill Fitzmaurice Designs

When it comes to earth-shaking gut-wrenching low-down bass there's
no substitute for a folded horn.

Tuba Subs take advantage of proprietary folding topology to squeeze
the most performance possible from small woofers, and that translates
into huge bass from small cabinets,with high efficiency

Tuba 30 DIY Subwoofer Kit

• Dimensions: 16in-30x30inx30in
• Weight: Approx 50-65lbs, dependent on driver and hardware
• Response 30-200hz

Complete details and plans are available from

Kit Contents

Tuba 30/Deluxe Kit Includes:

• Every nut, bolt, screw and washer to complete your cab.  All hardware and screws are black
• Gasket Tape
• 8 Chevron or Metal Corners
• 2 tubes PL Constuction Adhesive
• Dish with gasket, includes jacks with screws/bolts and wire connectors, choose your style
• 8 Drivers to choose from
• All parts are tested and confirmed by the SpeakerHardware shop to fit a Tuba.  Some handles are difficult to fit

Response Graphs

Tuba 30 30"wide NLW9300 and 3012lf