FPUO · Audio Division · Est. 2009

Built for
the frequency
that hits.

Bespoke subwoofer enclosures, modeled to your driver's Thiele-Small parameters and your vehicle's available volume. Designed in SketchUp, built from premium MDF and Baltic birch — no off-the-shelf compromises.

240+Builds delivered
0.1cu·ftTuning tolerance
3-4 wkStandard lead time
Custom MDF subwoofer enclosure mid-build SHOP · ENCLOSURE №105 · BUILD IN PROGRESS
FORPROFESSIONALUSEONLY · AUDIO
The Standard

No two
vehicles
sound the
same.

"Engineered, not estimated."

Every enclosure starts with your subwoofer's Thiele-Small parameters — Vas, Fs, Qts — paired with the actual cubic inches your vehicle can spare. From there, the cabinet is modeled in SketchUp: internal volume, port geometry, bracing layout, and baffle thickness all dialed in before the saw fires.

±0.1CU·FT Volume Tolerance Modeled, cut, and verified to within a tenth of a cubic foot.
3/4" MDF Standard Premium MDF or Baltic birch on every panel. No particle board.
2HZ Tuning Accuracy Port length and area cross-checked against the modeled response curve.
Configurations Sealed, ported, bandpass — single or quad driver, any orientation.
Three Ways In

Plans, built,
or all-in.

Pick the level of involvement that fits — get the drawings and DIY, or hand it off entirely.

01 / PLANS

Custom Plans

Dimensioned drawings & cut sheets — you build it.

$85flat
Per design · In as little as a week
  • SketchUp model tuned to your driver & space
  • Dimensioned cut sheet with material take-off
  • Port geometry length, area & tuning frequency
  • Email Q&A through your build
Order Plans →
03 / CUSTOM

Full Install

Vehicle-specific, integrated, painted or upholstered.

POAquote
Athens, GA area · Timeline by scope
  • Everything in Built-to-Order
  • Vehicle-specific trunk/bed integration
  • Custom paint, upholstery, or vinyl wrap
  • Plexi window, LED lighting, amp rack on request
  • On-site install & system tune
Discuss Project →
Live Configurator

See your
box, before
it's built.

Updating live
Internal volume
2.42CU·FT NET
Port tuning
33HZ
Material
3/4" MDF
Est. price
$725
Build Process

Four steps,
signed off at every gate.

Nothing gets cut until the model checks out and you've signed off on the geometry. No surprises, no “close enough.”

01
Consult
Day 1-3

Driver T/S parameters, vehicle measurements, sound goal. We draft a brief and lock the scope.

02
Design
Day 4-10

SketchUp model, port tuning, bracing layout. You see the box before a single piece is cut.

03
Build
Day 11-21

CNC-precise cuts, glued and screwed joinery, sealed seams, lined for resonance, and finished.

04
Deliver
Day 22-28

Crated and shipped — or local pickup with a fitment check at the shop. Drop-in ready.

In the wild

Recent client builds.

View full gallery →
F-150 SuperCrew · 2× 12" Ported Build №105 · DC Audio Level 4
Single 15" Ported · Truck Bed Build №108 · Sundown SA-15
Custom 4× 10" Sealed Wall Build №112 · Competition SQ
Tahoe · Spare Tire Conversion Build №110 · 12" Ported
Photo coming Submit yours

The box hit exactly like the SketchUp model showed — wall-to-wall bass without the port noise I had from my off-the-shelf enclosure. Curtis knew exactly what my setup needed.

DERRICK B. · 2018 Ram 1500 · 2× 12" Ported · Build №097
Start a Build

Send the
specs.

The faster you can give us your driver, vehicle, and the cubic inches you've got to work with, the faster we can come back with a model and a quote.

  • Reply within 2 business days
  • Free preliminary fitment review
  • Quote good for 30 days
  • 50% deposit on go-ahead