12 inch Ported Box for Sundown SA 12
$ 399.99
Only 2 Left
Details
Ported, Professional Series
Sundown Audio Subwoofer Boxes and Enclosures
Ported enclosures cut for Sundown Audio subwoofers, CNC-machined in Tullahoma, Tennessee.
Ported, Professional Series
Ported Sundown Audio enclosures in Professional Series construction, with the port tuned for the driver each cabinet was cut for. More being added.
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Sealed or Ported for a Sundown Driver
These cabinets are ported on purpose. If you are still weighing the two alignments for the same driver, this is the comparison that matters.
| Sealed | Ported | |
|---|---|---|
| Output around tuning | Lower | Higher, often markedly |
| Roll-off | Gentle, about 12 dB per octave | Steep below tuning, about 24 dB per octave |
| Cabinet size | Smaller for the same driver | Larger: port and alignment both need volume |
| Character | Tight and damped | Loud and extended around tuning |
| Best when | Space is tight or accuracy is the point | You have the space and want output |
Shared across every row: Langboard Elite MDF cut on ShopSabre routers in Tullahoma, Tennessee. Plush black carpet. A Proline X ABS and carbon fibre composite terminal cup with stainless hardware, pre-wired in 12-gauge OFC. Construction method varies by series and is stated on each product page.
Port Area Is Not a Detail
A port too small for the excursion you are asking of the driver will make noise, and no amount of tuning afterwards removes it. Our ports are sized for the excursion the driver is rated to, which is why they look large next to a generic box.
We Cut the Box, You Source the Driver
We do not currently stock Sundown Audio subwoofers. These cabinets are built to Sundown's published figures for a driver you already own or buy elsewhere. Nothing about the fit depends on where it came from.
Professional Series
More baffle and more internal bracing than our standard driver-matched build. A ported alignment rewards that work more than a sealed one does.
Cut to one driver
Port sizing
Length and area cut together to produce a specific tuning, with the area sized for the driver's rated excursion rather than a convenient number.
Ported
More on the way
Everything is CNC-cut to order in Tullahoma. More Sundown cabinets are being added, and we can quote a configuration that is not listed yet.
Made to order
Baffle thickness and construction method vary by series. Each product page states how that cabinet is built and which Sundown Audio model it was cut for.
Keep Reading
Supporting guides to help you design, build, and tune your system.
DecisionWhat Is EBP? Sealed vs Ported
The single number that says whether your Sundown driver wants a ported alignment or a sealed one. Worth checking before you order.
Read the guide
ExplainerBandpass: 4th vs 6th Order
If a ported Sundown build is not enough, this is the next step and what it costs in cabinet size and complexity.
Read the guide
DecisionSealed, Ported or Bandpass
The three alignments side by side, for context on why the Sundown cabinets we cut are ported rather than sealed.
Read the guide
DecisionBest Subwoofers for Trucks
Sundown builds usually end up in a truck. This is what actually works in a cab once the airspace is accounted for.
Read the guide
ExplainerMDF vs Plywood
What the panel material does to a ported Sundown cabinet, where a flexing panel changes the tuning rather than just the sound.
Read the guide
ApplicationPower Handling Calculator
Match amplifier power to the Sundown driver, since a ported alignment lets it take more of it than a sealed one would.
Read the guideSundown Audio Subwoofer Box Questions
Which Sundown Audio subwoofers do these boxes fit?
Each cabinet is cut to the published parameters of a specific Sundown Audio model, named on its product page. Match the model number rather than the nominal size, because two Sundown drivers of the same diameter from different lines want different net volumes and different port tuning.
Do you sell Sundown Audio subwoofers?
Not at the moment. We build the enclosure to the figures Sundown publishes and you source the driver. If you already own the subwoofer, that is exactly what these cabinets are for.
Why are these ported rather than sealed?
Because these drivers are built for output and a ported alignment is how you get it. Around the tuning frequency a ported cabinet produces more than a sealed box of the same size. The trade is a larger cabinet and a steeper roll-off below tuning.
What does the tuning frequency actually change?
It sets where the cabinet does its best work. Lower tuning extends deeper and gives up midbass punch; higher tuning hits harder in the midbass and gives up extension. The port length and area produce it, so it is fixed by the cabinet rather than adjustable afterwards.
Can I modify the port to change the tuning?
We do not recommend it. The port is cut to produce a specific tuning for a specific driver, and altering it leaves you with an alignment nobody designed. If you want different tuning, start from a cabinet built for it.
Are you adding more Sundown enclosures?
Yes. More Sundown cabinets are being added. Everything is CNC-cut to order in Tullahoma, Tennessee, so if the size or configuration you need is not listed yet, contact us with the model and we will tell you whether we can build it.
Drivers Built to Match
12 Inch Subwoofers We Do Stock
The drivers below are matched to the enclosures above by Thiele-Small parameters. Buying together guarantees the alignment, port tuning, and damping work the way the engineering intended.
Drivers Built to Match
15 Inch Subwoofers We Do Stock
The drivers below are matched to the enclosures above by Thiele-Small parameters. Buying together guarantees the alignment, port tuning, and damping work the way the engineering intended.
Amplifiers for the System
Power for Your Subwoofer System
Monoblock amplifiers matched to the power requirements of the drivers these enclosures are built for. Buy the enclosure, match the driver, pick the right amplifier.
Rainbow
Rainbow Audio SL-M2 2 channel micro amplifier
$ 89.99 $ 549.99
Rainbow
Rainbow Audio Dream 0.5K Mono Class D Amplifier
$ 89.99 $ 399.99
US Acoustics
US Acoustics Lisa | 4 Channel Class AB Amplifier | 4 x 50w
$ 159.99
US Acoustics
US Acoustics Wendy | 2 Channel Class AB Amplifier | 2 x 75w
$ 159.99
Last updated August 28, 2026