Proline X M10-S Micro Series enclosure loaded with an Arc Audio SW Series subwoofer, front view with terminal cup.Proline X M10-S Micro Series enclosure, carpet wrapped, with the Arc Audio badge inset on the front panel.Arc Audio SW Series subwoofer mounted in a Proline X M10-S enclosure, close view with a tape measure alongside.

Micro Series · Datasheet

M12-S ARC SW | Single 12" Sealed Subwoofer Enclosure | Built for Arc Audio SW12 Single 12" Sealed enclosure

Net volume
0.65 / 0.8 / 1.0 cu ft (true net, selectable by size)
Cutout
11 in, bored for the Arc Audio SW12
External dimensions
26 x 14.75 x 5.25 in / 26 x 14.75 x 6.75 in / 26 x 14.75 x 8.25 in
Buy at Audio Intensity
  • Fits: Arc Audio SW12 | 2.4" Shallow-Mount | Motor Outside Sealed Volume
  • Net Volume: 0.65 / 0.8 / 1.0 cu ft | Shared 26" x 14.75" Footprint
  • Orientation: Down-Fire Primary, Front-Fire Secondary | 4-Foot Kit Included
  • Build: Stack-Fab Langboard Elite MDF | 3" Radiused Corners | Pre-Wired 12g OFC

Technical specifications

SeriesProline X Micro Series
Enclosure TypeSealed
Firing OrientationDown-fire primary, front-fire secondary
Included Hardware4-foot down-fire kit (installed as needed)
Driver FitmentArc Audio SW12 (D2 or D4)
Baffle Cutout11 in, bored for the Arc Audio SW12
Net Internal Volume0.65 / 0.8 / 1.0 cu ft (true net, selectable by size)
External Dimensions26 x 14.75 x 5.25 in (0.65)  /  26 x 14.75 x 6.75 in (0.8)  /  26 x 14.75 x 8.25 in (1.0)
Mounting Footprint26 x 14.75 in (shared across all three sizes)
MaterialLangboard Elite 3/4 in MDF (48.5 lb/ft³, 200 psi internal bond, 410,000 psi MOE)
ConstructionStack-fabricated on ShopSabre CNC, dowel tension reinforcement
Corner Radius3 in, all four corners (viewed top-down)
Driver Mounting8/32 threaded inserts on baffle back face, machine screws included
Terminal CupProline X ABS / carbon-fiber composite, stainless hardware, copper ring terminals, pre-wired 12-gauge OFC
DampingPolyfill pre-installed
FinishPlush black carpet
ConfigurationsEnclosure only / Loaded SW12 D2 / Loaded SW12 D4
Build LocationTullahoma, Tennessee
Warranty2-year limited
ShippingIncluded to the lower 48

Performance in this enclosure

Net airspace
0.80
cu ft per chamber
System Qtc
0.97–0.98
sealed
Half power
41.3–41.5
Hz · F3
Xmax at
1039
W RMS · no filter
With 25 Hz subsonic
1080
W RMS · +4%
Amplifier
400
W RMS recommended
This enclosure holds 0.80 cu ft net per chamber. In it the Arc Audio SW12D4 runs a system Qtc of 0.97–0.98 with half power at 41.3–41.5 Hz, and the cone reaches its 15.5 mm travel limit at 1039 W, above the driver’s 400 W thermal rating, so heat stops you before travel does. Run a subsonic filter at 25 Hz and that becomes 1080 W — +40 W, or 4 percent more power for the same 15.5 mm of travel.

01Is it a sealed driver?

Efficiency bandwidth product places the motor before anything else is decided.

EBP = Fs ÷ Qes = 45.4–45.9
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 parallel 45.9 series 45.4
parallel · EBP 45.9series · EBP 45.4
EBP under 50 means a motor that wants a sealed load. The SW12D4 sits at 45.4–45.9, inside that band, which is why this is a sealed build rather than a ported one.

02What the box does to it

0.80 cu ft against a 33.7 L Vas.

α = Vas ÷ Vb = 1.49  ·  Fc = Fs√(α+1) = 52–52 Hz  ·  Qtc = 0.97–0.98
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
parallel · Qtc 0.97, Fc 52 Hz, F3 41.5 Hzseries · Qtc 0.98, Fc 52 Hz, F3 41.3 Hz
The box lifts resonance from 33.0 Hz free-air to 52–52 Hz and half power lands at 41.3–41.5 Hz, anechoic, before any cabin gain. This enclosure ships without a driver, so both coil variants the maker offers are plotted. They do not load the same box the same way.

03The watts that reach Xmax (in this enclosure)

Travel scales with the square root of power, so there is one wattage that puts the cone exactly on 15.5 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.

PXmax = 1039–1041 W unfiltered  →  1080–1080 W with a 25 Hz subsonic
20 30 50 70 100 150 200 0 4 8 12 16 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 15.5 mm 1039 W reaches Xmax here
parallel · 1039 W, no filterseries · 1041 W, no filterparallel · 1080 W with subsonic at 25 Hz, 24 dB/octseries · 1080 W with subsonic at 25 Hz, 24 dB/octXmax 15.5 mm one-way
Every trace touches the limit and no further, because each is drawn at the exact power that puts that coil on 15.5 mm. Unfiltered that is 1039 W, reached first at 36 Hz. It sits above the 400 W the driver can take thermally, so the voice coil gives up before the suspension does. The dashed traces are the same driver behind a subsonic filter at 25 Hz, 24 dB/oct: stopping the cone wasting travel below the passband lets it take 1080 W before hitting the same 15.5 mm. That is 4 percent more amplifier for the price of one filter setting.
ParamValueUnitNote
Fs33.00Hzfree-air resonance
Qts0.616 / 0.624parallel / series
Vas33.73 / 33.44Lequivalent compliance
Sd533.0cm²effective piston area
Xmax15.5mmone-way linear travel
Pe400Wcontinuous RMS
SPL84.1dB1 W / 1 m, derived from T/S

Driver parameters as published by arcaudio.com SW10 published specification table. Curves computed against this enclosure’s actual net airspace.

Installer's take

I built this box around one driver and one job. The Arc Audio SW12 is a 2.4 inch shallow-mount with the motor hung outside the sealed chamber, which means I am not designing around a magnet eating up my airspace. That is a gift on a shallow build. It lets me keep the chamber clean and give you a true net number instead of a gross figure with the losses buried in the fine print. The 12 needs more air than the 10 to behave, so these boxes run a little deeper. With a Vas of 33.73 liters the SW12 wants real volume to hit its target alignment, and I built the three sizes to land it. The 0.65 is the tight, warm option for when depth is the limit. The 0.8 is Arc's recommended volume and where this driver sounds the most honest to me, deep and controlled without getting loose. The 1.0 is the flattest, deepest of the three when you have the room. Same 26 by 14.75 face on all three, just different depths. Pick the one your space allows and the one your ears want. I designed it to fire down first. Down-fire is where this box wants to live, so I include a 4-foot kit you bolt on when you run it that way. The feet set the gap the cone loads against, couple the bass into the floor, and keep the driver face off the deck. With the SW12 motor sitting outside the box, it ends up breathing free air in that down-fire cavity instead of cooking in a sealed pocket. If your space does not allow a down-fire mount, leave the feet off and run it front-fire. Same box, your call. Construction is the same Micro Series standard I put on everything: stack-fabricated Langboard Elite MDF, dowels between the layers for tension only, three inch radiused corners, polyfill already in, and our own ABS and carbon fiber terminal cup pre-wired with 12 gauge OFC. No CCA, no shortcuts. Order it loaded and I mount the SW12 in the coil you choose, dress the wire, and seal it so you bolt it in and turn it on. - Scott

Questions

What subwoofer does the Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12 fit?

It is cut specifically for the Arc Audio SW12, a 2.4 inch shallow-mount 12 inch subwoofer. The baffle is bored to the SW12's 11 inch cutout with 8/32 threaded inserts on the back face for machine-screw mounting. It is built for the SW12 and is not a universal 12 inch box.

Which enclosure size should I choose, 0.65, 0.8, or 1.0 cubic feet?

All three sizes share the same 26 by 14.75 inch footprint and only differ in depth. The 0.65 cubic foot Minimum size (26 x 14.75 x 5.25 in) is the lowest profile with a warm, slightly boosted character. The 0.8 cubic foot Optimum size (26 x 14.75 x 6.75 in) is Arc Audio's recommended sealed volume and the most balanced alignment. The 1.0 cubic foot Maximum size (26 x 14.75 x 8.25 in) gives the flattest response and deepest extension. Choose the largest size your depth clearance allows.

Is the listed airspace net or gross volume?

The 0.65, 0.8, and 1.0 cubic foot figures are true net internal airspace. They are calculated by summing each CNC-cut layer's opening after the walls, bracing, and driver are accounted for. The Arc Audio SW12's front-mounted motor sits outside the sealed chamber, so it does not consume internal volume.

Can I order the Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12 already loaded with the driver?

Yes. You can order it as an empty enclosure or loaded with the Arc Audio SW12 already mounted, wired, and sealed. Loaded builds are available with either the SW12 D2 or SW12 D4 coil configuration, selected by variant. Loaded units ship ready to bolt in and connect.

Should I choose the SW12 D2 or SW12 D4 when ordering loaded?

Choose based on your amplifier. The Arc Audio SW12 D2 wires to 1 ohm or 4 ohm and suits amplifiers that make their rated power into low impedance. The Arc Audio SW12 D4 wires to 2 ohm or 8 ohm and pairs with a wider range of amplifiers. Both coils handle 400 watts RMS and 800 watts peak. If you are unsure, contact us with your amplifier model and we will confirm the right coil.

Is the Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12 down-firing or front-firing, and what about mounting depth?

It is designed primarily as a down-fire enclosure and works front-fire as a secondary orientation. A 4-foot down-fire kit is included. Install the four feet when you run it down-fire to set the cone-to-floor gap, couple the bass into the chassis, and protect the driver face, then account for the added height of the feet plus the floor gap they create. Leave the feet off when you mount it front-fire. The Arc Audio SW12 has a 2.4 inch mounting depth, or 2.23 inches front-loaded, and the Minimum size box is only 5.25 inches deep externally, which makes this one of the shallowest sealed 12 inch options for behind-seat and under-seat truck installs.

How is the Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12 built?

It is stack-fabricated on ShopSabre CNC routers from Langboard Elite three-quarter inch MDF, a dense board with a 200 psi internal bond and 410,000 psi MOE. The layers do the joining, dowels add between-layer tension reinforcement, and all four corners are radiused 3 inches. It includes a pre-wired Proline X ABS and carbon-fiber terminal cup with stainless hardware and copper ring terminals, pre-installed polyfill, and a plush black carpet finish.

What warranty and shipping come with the Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12?

The enclosure carries a 2-year limited warranty and ships free to the lower 48 states. When ordered loaded, the Arc Audio SW12 driver carries Arc Audio's 1-year limited warranty through authorized dealers. Every enclosure is built one at a time in Tullahoma, Tennessee, so allow standard build lead time before shipment.

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