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Proline X PO 10Q-S W R2S sealed wedge enclosure, product photos pending. Placeholder graphic reading Photos Coming Soon.

Performance Optimized · Datasheet

Performance Optimized Wedge Wide Sealed Quad 10" Enclosure Rockford Fosgate R2SD4-10 · Quad 10" Sealed enclosure

Net volume
0.663 cu ft per driver, 2.65 cu ft total, after the divider and Rockford Fosgate's published 0.037 cu ft displacement per driver
Max mounting depth
3.42 in required; 3.27 in clearance above the motor against the raked rear panel
External dimensions
44 in W × 17 in at the seat face H × 13.75 in at the base D
Front baffle
1.5 in double baffle, frames face mounted
Buy at Audio IntensityFactory-direct, ships from Tullahoma
Rockford Fosgate R2SD4-10Buy at Audio Intensity
  • Best For: Quad Rockford Fosgate R2SD4-10 SUV Cargo-Floor Builds
  • Net Volume: 0.663 cu ft per Driver (2.65 cu ft Net Total)
  • Driver Match: Four Rockford Fosgate R2SD4-10 (Dual 4 Ohm), matched
  • Construction: 2 Chambers | 44" Wide Wedge | V-Groove/Dado | Double 1.5" Baffle | 2 Terminal Cups

Spec of record

Technical specifications

SpecificationValue
SeriesProline X Performance Optimized Wedge Wide
Compatible DriverRockford Fosgate R2SD4-10, quantity 4, matched. Direct fit
ConfigurationQuad 10 inch sealed wedge, 2 chambers, 2 drivers per chamber
Mounting PositionSUV cargo floor, raked face against the rear seat back
Firing DirectionRearward toward the liftgate. Not a down fire design
External Width44 in
External Height17 in at the seat face
External Depth13.75 in at the base, tapering to 7.57 in at the top
Internal Volume, Gross2.85 cu ft total
Internal Volume, Net Acoustic0.663 cu ft per driver, 2.65 cu ft total, after the divider and Rockford Fosgate's published 0.037 cu ft displacement per driver
Driver Mounting Depth3.42 in required; 3.27 in clearance above the motor against the raked rear panel
Alignment Per DriverR2SD4-10 Qtc 1.072, fc 57.7 Hz, F3 44.1 Hz anechoic
Woofer Openings4 at 9.125 in
Woofer LayoutStaggered on the height, outer pair low, inner pair high
Frame Outer Diameter10.84 in
Fs / Qts / Qes / Qms39.3 Hz / 0.730 / 0.810 / 7.000
Vas / Sd / Xmax21.7 L / 333 cm2 / 8 mm
Driver Power Handling200 W RMS per driver, 800 W RMS for the set of 4 (thermal rating)
Recommended Amplifier100-140 W RMS per driver, 400-560 W RMS for the full set, at 2 ohms
Parameter SourceRockford Fosgate published specifications
MaterialLangboard Elite MDF
ConstructionCNC cut, V-groove and dado joinery
Panel Thickness0.75 in
Front Baffle1.5 in double baffle, frames face mounted
Internal BracingOne full-height 3/4 in divider
Driver MountingThreaded inserts, stainless machine screws included
Terminal CupsTwo Proline X ABS and carbon fiber composite, side mounted, one per chamber, pre wired 12 gauge OFC
Acrylic InsertGloss black acrylic baffle insert standard
DampingLight polyfill wall lining in every chamber, does not alter acoustic volume
CarpetPlush black
Shipping Weight73 lb
Warranty1 Year Limited
Built InTullahoma, Tennessee

Modelled response

Performance in this enclosure

Net airspace
0.663
cu ft per driver
System Qtc
1.07
sealed
Half power
44.1
Hz · F3
Xmax at
148
W RMS per driver · no filter
With 25 Hz subsonic
150
W RMS per driver · +1%
Amplifier, per driver
100–140
W RMS recommended
This enclosure holds 0.663 cu ft net per driver. In it the Rockford Fosgate R2SD4-10 runs a system Qtc of 1.07 with half power at 44.1 Hz, and the cone reaches its 8.0 mm travel limit at 148 W per driver, below the driver’s 200 W thermal rating, so travel is what stops you here, not heat. A 25 Hz subsonic filter adds little here: 150 W per driver against 148 W, 1 percent. The box already resonates at 58 Hz, so its own rolloff has removed most of what the filter would have stopped.

00Sizing the amplifier

Every wattage on this panel is per driver. This cabinet holds four, so the amplifier feeds all four at once.

Per driver 100–140 W RMS  ×  4 drivers  =  full set 400–560 W RMS at 2 ohms
Look for a mono amplifier rated 400–560 W RMS at 2 ohms, the load the set wires to most easily. Travel sets the top here, not heat: past 150 W per driver the cone runs beyond Xmax even with the subsonic set, under the driver’s 200 W thermal rating. Below the bottom of the range it will play, just with less headroom; above the top you are buying power the drivers cannot use.

01Is it a sealed driver?

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

EBP = Fs ÷ Qes = 48.5
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 Dual 4 Ohm 48.5
Dual 4 Ohm · EBP 48.5
EBP under 50 means a motor that wants a sealed load. The R2SD4-10 sits at 48.5, inside that band, which is why this is a sealed build rather than a ported one.

02What the box does to it

0.663 cu ft against a 21.7 L Vas.

α = Vas ÷ Vb = 1.16  ·  Fc = Fs√(α+1) = 58 Hz  ·  Qtc = 1.07
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
Dual 4 Ohm · Qtc 1.07, Fc 58 Hz, F3 44.1 Hz
The box lifts resonance from 39.3 Hz free-air to 58 Hz and half power lands at 44.1 Hz, anechoic, before any cabin gain. Figures are Rockford Fosgate’s published parameters; Qes and Qms reproduce the printed Qts. This cabinet holds four drivers in two sealed chambers of 1.326 cubic feet, two drivers to a chamber, so each driver works into 0.663 cubic feet and that is the volume plotted here.

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 8.0 mm, and in this alignment a subsonic filter barely moves it.

PXmax = 148 W per driver unfiltered  →  150 W per driver with a 25 Hz subsonic
20 30 50 70 100 150 200 0 4 8 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 8.0 mm 148 W reaches Xmax here
Dual 4 Ohm · 148 W, no filterDual 4 Ohm · 150 W with subsonic at 25 Hz, 24 dB/octXmax 8.0 mm one-way
Every trace touches the limit and no further, because each is drawn at the exact power that puts that coil on 8.0 mm. Unfiltered that is 148 W per driver, reached first at 44 Hz. It sits under the 200 W the driver can take thermally, so the enclosure sets the ceiling, not the voice coil. The dashed traces are the same driver behind a subsonic filter at 25 Hz, 24 dB/oct, and they sit almost on top of the solid ones: 150 W per driver against 148 W. At 58 Hz the filter sits well below resonance, where the sealed alignment has already rolled the cone off at 12 dB/oct, so there is little wasted travel left for it to recover. Set it anyway to keep road rumble out of the cone, but do not size the amplifier around it.
ParamValueUnitNote
Fs39.30Hzfree-air resonance
Qts0.730Dual 4 Ohm
Vas21.70Lequivalent compliance
Sd333.0cm²effective piston area
Xmax8mmone-way linear travel
Pe200Wcontinuous RMS
SPL84.0dB1 W / 1 m, derived from T/S

Driver parameters as published by Rockford Fosgate R2SD4-10 published specifications. Curves computed against this enclosure’s actual net airspace.

From the shop floor

Installer's take

Start with the size. 0.663 cubic feet per driver puts the R2SD4-10 at Qtc 1.072, resonance 57.7 Hz, half power 44.1 Hz anechoic. That is Rockford Fosgate's number, not ours: the cabinet is built to the maker's recommended sealed size. It is a pronounced lift near resonance, 1.7 dB above flat.

Measure the base depth, not the top. This cabinet is 13.75 in deep where it meets the floor, 7.57 at the top, 44 wide and 17 tall. In an SUV the 44 has to clear between the rear wheel wells at floor height, the base depth is measured from the seat back with the seat upright and latched, and the 17 has to clear the cargo cover.

The two terminal cups are on the side panels, one per chamber, so they sit close to the wheel wells. Land the speaker wire on both before the box slides into its final spot, with slack to pull it forward again.

Two drivers share each chamber, so they have to match: same model, same coil, wired in phase. One driver reversed in a shared chamber pushes against its partner and the pair cancels instead of adding. Check polarity at each cup with a battery tap before the box goes in. The outer pair sits 2.88 in lower than the inner pair on purpose: that is how four 10.84 in frames fit across 44 in. The frames mount on the face rather than in a recess.

Impedance. R2SD4-10: wire for 2 ohms (coils in series, each chamber's pair in parallel, both cups in parallel), the load most monoblocks are built to deliver full power into; 8 ohms is the other clean option (coils in series, each chamber's pair in series, both cups in parallel). Work the load out before you buy the amplifier, not after.

Power. Size the amplifier for the set, not one driver: 100 to 140 W RMS per driver is 400 to 560 W RMS across all 4 at 2 ohms. On this driver travel sets the top, not heat: Xmax arrives at 150 W per driver with a 25 Hz subsonic, under the 200 W rating.

Rockford Fosgate's Qes and Qms reproduce the printed Qts within 3 percent, so the alignment rests on a self-consistent set.

Polyfill is in as a wall lining in every chamber. Do not add more: it makes the box act larger and walks Qtc off 1.07.

Before you order

Questions

Does this fit the Rockford Fosgate R2SD4-10, and its coil versions?

Yes. Each opening is cut to 9.125 in for the 10.84 in frame, and the 3.42 in deep motor clears the raked rear panel with 3.27 in to spare. Coil versions of the Rockford Fosgate R2SD4-10 share the frame, cutout and mounting depth, so any of them drops in. The alignment on this page is computed on the R2SD4-10 parameters.

Run four matched drivers, same model and same coil, so every chamber sees the alignment on this page.

Why 0.663 cubic feet per driver, and what alignment does it target?

On Rockford Fosgate's published Fs 39.3 Hz, Qts 0.730 and Vas 21.7 liters, 0.663 cubic feet per driver gives Qtc 1.072, system resonance 57.7 Hz and half power 44.1 Hz.

The cabinet is sized to the maker's recommended sealed size, 0.66 cubic feet per driver, to keep it realistic for a cargo floor. this size trades a little low end for a compact box and a pronounced lift near resonance, 1.7 dB above flat.

What amplifier power should I run, and how should I wire it?

Rockford Fosgate rates the R2SD4-10 at 200 watts RMS per driver. Recommended amplifier: 100 to 140 W RMS per driver, 400 to 560 W RMS for the full set of 4. Travel, not heat, sets the top: the cone reaches Xmax at 150 W per driver with a 25 Hz subsonic set, under the 200 W rating.

Each R2SD4-10 has two 4 ohm voice coils, 8 ohms in series or 2 ohms in parallel. Wire every driver's coils in series. With the two drivers in each chamber in parallel and the two cups in parallel, the four present 2 ohms to a mono amplifier. With the two drivers in each chamber in series and the two cups in parallel, they present 8 ohms. Use the lower load only on an amplifier rated stable there.

Will it fit my SUV?

It is 44 inches wide, 17 tall and 13.75 deep at the base, tapering to 7.57 at the top. Measure between the rear wheel wells, the floor depth with the seat upright, and the height under your cargo cover.

The raked face goes against the seat back and the woofers fire toward the liftgate.

Why two drivers per chamber instead of four chambers?

Four chambers would need three dividers, and on a 44 inch face that space is needed for the woofers. Two matched drivers in one sealed chamber move together and see the same pressure, so each behaves as if it had half the chamber to itself: 0.663 cubic feet per driver here.

It also gives two terminal cups, one per pair, which keeps the wiring to the amplifier simple.

What is the expected low-frequency extension?

Anechoic F3 is 44.1 Hz per driver with system resonance at 57.7 Hz.

Those figures exclude cabin gain. An SUV cabin adds real output below about 50 Hz, so in-vehicle response runs deeper than the numbers above.

Do I need to add polyfill or damping?

No. Polyfill is already installed as a light wall lining in every chamber, and the quantity is chosen so it does not change the acoustic volume.

Do not add more. Packing a sealed box makes it behave as though it were larger, which moves the alignment away from 0.663 cubic feet per driver.

Are the drivers included?

No. This is an enclosure only. You receive the cabinet finished in plush black carpet with the gloss black acrylic baffle insert, two side-mounted pre-wired terminal cups, the polyfill lining in place, threaded inserts and stainless machine screws.

Bring four matched Rockford Fosgate R2SD4-10 drivers. The cabinet is cut direct fit to them, not a general purpose 10 inch box.

Same series, same size

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