Proline X
Performance Optimized Wedge Sealed Dual 8" Enclosure | Dayton Audio Reference RSS210HO
SKU: PO 8D-S W RSS210HO BB
- Best For: Dual Dayton Audio Reference RSS210HO Trunk-Fit Builds
- Net Volume: 0.31 cu ft per chamber (0.75 cu ft Gross Total)
- Driver Match: Pair of Dayton Audio Reference RSS210HO (RSS210HO-4 (single 4 ohm) and RSS210HO-8 (single 8 ohm)), matched
- Construction: Dual Chamber | Rear-Firing Wedge | V-Groove/Dado | Double 1.5" Baffle | 1 Shared Terminal Cup | Inserts Installed
Financing available. Choose Shop Pay Installments at checkout.
Performance Optimized Wedge Sealed Dual 8" Enclosure | Dayton Audio Reference RSS210HO
More enclosures cut for Dayton Audio subwoofers: Dayton Audio Subwoofer Boxes
Performance Optimized Wedge | Dual Dayton Audio Reference RSS210HO
Dual 8" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design
A Pair of Dayton Audio Reference RSS210HO in a Sealed Wedge
The RSS210HO is Dayton's 8 inch Reference HO: an extra-thick black anodized aluminum cone, a triple shorting-ring motor, a fully vented four-layer coil and parameters Dayton optimizes for small enclosures, rated 300 watts RMS with 11 mm of one-way excursion, 4.96 inches of mounting depth on an 8.39 inch frame. Every Thiele-Small figure comes from Dayton's own spec sheet, and it holds together: Qes and Qms reproduce the printed Qts, the moving mass matches the published Vas and cone area, and Qes follows from Bl, Re and Mms.
0.31 cubic feet net per chamber on Dayton's published figures: the RSS210HO-4 (single 4 ohm) reads Qtc 0.708 with resonance at 52.4 Hz and half power at 52.3 Hz, and the RSS210HO-8 (single 8 ohm) reads Qtc 0.690 with resonance at 52.4 Hz and half power at 53.7 Hz. One cabinet serves both coils, built to the volume that keeps both closest to maximally flat. That is spread either side of maximally flat: the lower-Q coil a little drier, the higher-Q coil a little punchier.
Two Fully Separate Chambers
A bonded full-height 3/4 inch MDF divider splits the cabinet into two sealed chambers of 0.31 cubic feet net each, so every driver sees exactly the airspace printed on this page. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.
The cabinet is 24.39 inches wide, 11 tall, 7.21 inches deep at the top and 11.21 at the base; the airspace sets the width. One shared side-mounted terminal cup feeds both driver positions.
Trunk-Load Wedge Design Explained
The drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.
Seat-Side Face Matches Seat Lean
Angled face matches the roughly 20 degree factory seat lean.
Trunk-Lid-Side Face Fires the Woofers
Vertical baffle, cones firing rearward into the trunk cavity.
Trunk Cavity Loading
The trunk acts as an acoustic extension for a smoother presentation.
Preserves Trunk Cargo Space
The wedge tucks against the seat back and the space in front stays usable.
Engineered for a pair of Dayton Audio Reference RSS210HO
Anechoic half power lands at 52.3 Hz on the RSS210HO-4 (single 4 ohm) and 53.7 Hz on the RSS210HO-8 (single 8 ohm), before any cabin gain. Dayton does not publish driver displacement (its Vd is the cone's swept volume), so an estimated 0.051 cubic feet per driver is taken out of the net figure.
Alignment Numbers (Per Chamber)
| Driver (per chamber) | System Qtc | fc | F3 |
|---|---|---|---|
| Reference RSS210HO RSS210HO-4 (single 4 ohm) | Qtc 0.708 | 52.4 Hz | 52.3 Hz |
| Reference RSS210HO RSS210HO-8 (single 8 ohm) | Qtc 0.690 | 52.4 Hz | 53.7 Hz |
Mounting Geometry
The baffle is cut to 7.28 in for Dayton's 8.39 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 7.21 in at the top to 11.21 in at the base, and the 4.96 in motor clears it with 0.75 in to spare. Dayton prints the RSS210HO's bolt circle, 7.76 inches, so the threaded inserts are pressed into the baffle at the shop and stainless machine screws are included: the driver drops in and bolts down.
What the Numbers Rest On
Langboard Elite MDF
Premium 3/4 in MDF throughout.
V-Groove and Dado Joinery
CNC cut V-grooves at every panel intersection, sides and divider seated in dados.
Double-Layer 1.5" Front Baffle
Two bonded 3/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.
Dayton's Published Parameters
RSS210HO-4 (single 4 ohm): Fs 29.6 Hz, Qts 0.4, Qes 0.46, Qms 3.33, Vas 18.7 L, Mms 99.3 g, Bl 12 N/A, Re 3.6 ohm. RSS210HO-8 (single 8 ohm): Fs 29.6 Hz, Qts 0.39, Qes 0.45, Qms 2.78, Vas 18.7 L, Mms 99.3 g, Bl 15.6 N/A, Re 5.9 ohm. Cone area 214 cm2. Xmax 11 mm (one-way, as Dayton publish it).
Wiring a pair of Dayton Audio Reference RSS210HO to Your Amplifier
Dayton sells the RSS210HO as RSS210HO-4 (single 4 ohm) and RSS210HO-8 (single 8 ohm); a matched pair should share a coil. A pair of single 4 ohm drivers lands on 2 ohms in parallel or 8 ohms in series. A pair of single 8 ohm drivers lands on 4 ohms in parallel or 16 ohms in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for, so series wiring is the safe default. Confirm the final load against your amplifier's minimum stable impedance before powering the system.
Power handling is 300 watts RMS per driver, 600 across the pair. Aim for roughly 210 to 300 watts per driver at the impedance you wire.
Built in Tennessee, Backed by Audio Intensity
Cut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded inserts pressed at Dayton's bolt circle, stainless machine screws included. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.
Dual Dayton Audio Reference RSS210HO: Cut for One Driver
0.31 cubic feet net per chamber at Qtc 0.69 to 0.71, F3 52.3 Hz on the RSS210HO-4 (single 4 ohm) and 53.7 Hz on the RSS210HO-8 (single 8 ohm), cut direct fit and built to order in Tennessee.
| Specification | Value |
|---|---|
| Series | Proline X Performance Optimized Wedge |
| Compatible Driver | Dayton Audio Reference RSS210HO (RSS210HO-4 (single 4 ohm) and RSS210HO-8 (single 8 ohm)), quantity 2. Direct fit |
| Configuration | Dual 8 inch, two separate chambers, sealed wedge |
| Mounting Position | Trunk or cargo area, tall face against the rear seat back |
| Firing Direction | Rearward into the trunk. Not a down fire design, no feet included |
| External Width | 24.39 in |
| External Height | 11 in at the seat face |
| External Depth | 11.21 in at the base, tapering to 7.21 in at the top |
| Internal Volume, Gross | 0.75 cu ft total |
| Internal Volume, Net Acoustic | 0.31 cu ft per chamber after the divider and the driver displacement |
| Driver Mounting Depth | 4.96 in required; 0.75 in clearance above the motor against the raked rear panel |
| Alignment, RSS210HO-4 (single 4 ohm) per chamber | Qtc 0.708, fc 52.4 Hz, F3 52.3 Hz anechoic |
| Alignment, RSS210HO-8 (single 8 ohm) per chamber | Qtc 0.690, fc 52.4 Hz, F3 53.7 Hz anechoic |
| Woofer Opening | 7.28 in, two, cut for Dayton's frame |
| Frame Outer Diameter | 8.39 in |
| Bolt Circle | 7.76 in, Dayton spec; threaded inserts pre-installed |
| Driver Displacement | 0.051 cu ft, estimated; Dayton publishes none |
| RSS210HO-4 (single 4 ohm) Fs / Qts / Qes / Qms / Vas | 29.6 Hz / 0.4 / 0.46 / 3.33 / 18.7 L |
| RSS210HO-8 (single 8 ohm) Fs / Qts / Qes / Qms / Vas | 29.6 Hz / 0.39 / 0.45 / 2.78 / 18.7 L |
| Driver Sd | 214 cm2, Dayton spec |
| Xmax | 11 mm, one-way, as Dayton publish it |
| Driver Power Handling | 300 W RMS per driver |
| Wiring Options | Dayton sells the RSS210HO as RSS210HO-4 (single 4 ohm) and RSS210HO-8 (single 8 ohm); a matched pair should share a coil. A pair of single 4 ohm drivers lands on 2 ohms in parallel or 8 ohms in series. A pair of single 8 ohm drivers lands on 4 ohms in parallel or 16 ohms in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for, so series wiring is the safe default. |
| Parameter Source | Dayton Audio spec sheet |
| Material | Langboard Elite MDF |
| Construction | CNC cut, V-groove and dado joinery |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in double baffle, outer layer machined as a flush recess |
| Internal Bracing | Full-height 3/4 in divider |
| Driver Mounting | Threaded inserts pre-installed at Dayton's bolt circle; stainless machine screws included |
| Terminal Cups | One Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC to both driver positions |
| Acrylic Insert | Gloss black acrylic baffle insert standard; None variant minus $20 |
| Damping | Light polyfill wall lining in both chambers, does not alter acoustic volume |
| Carpet | Plush black |
| Shipping Weight | 31 lb |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
01Is it a sealed driver?
Efficiency bandwidth product places the motor before anything else is decided.
02What the box does to it
0.31 cu ft against an 18.7 L Vas.
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 11.0 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.
| Param | Value | Unit | Note |
|---|---|---|---|
| Fs | 29.60 | Hz | free-air resonance |
| Qts | 0.400 / 0.390 | RSS210HO-4 / RSS210HO-8 | |
| Vas | 18.70 / 18.70 | L | equivalent compliance |
| Sd | 213.8 | cm² | effective piston area |
| Xmax | 11 | mm | one-way, as Dayton publish it |
| Pe | 300 | W | continuous RMS |
| SPL | 82.1 | dB | 1 W / 1 m, derived from T/S |
Driver parameters as published by Dayton Audio spec sheet. Curves computed against this enclosure’s actual net airspace.
Built From a Spec Sheet, Not a Sales Sheet
Every Proline X Performance Series enclosure is CNC-cut from Langboard Elite MDF, 3/4" (18mm) panels produced to published mill specifications. Most enclosure manufacturers source generic MDF without published data. We can tell you the internal bond rating, the modulus of elasticity, the modulus of rupture, and the face and edge screw holding strength for every panel in this enclosure, because we chose the material based on those numbers, not on price or availability.
Langboard Elite is produced in the United States. The specifications below are pulled directly from Langboard's published mill data and are verifiable. This is the same panel stock used in our full Proline X lineup.
Langboard Elite MDF: Published Mill Data
| Property | Value | Why It Matters |
|---|---|---|
| Panel Stock | Langboard Elite MDF | Named, verifiable panel source, not generic "high-density MDF" |
| Thickness | 3/4" (18mm) | Industry standard for subwoofer enclosures; panels below this flex under pressure |
| Density | 48.5 lbs/ft³ | Higher density = less porosity, better screw retention, reduced resonance |
| Internal Bond | 200 psi | Measures resistance to delamination under sustained internal pressure. The most enclosure-relevant spec on this sheet |
| Modulus of Rupture (MOR) | 4,200 psi | Bending strength before the panel breaks, relevant for larger unsupported baffle spans |
| Modulus of Elasticity (MOE) | 410,000 psi | Stiffness under load; higher MOE means less panel flex under bass pressure, less resonance |
| Face Screw Holding | 325 lbs | How firmly the panel surface holds a screw; critical for baffle joint integrity over time |
| Edge Screw Holding | 250 lbs | Panel edge retention, relevant for every joint that isn't face-to-face |
200 psi: The Number That Actually Matters for Enclosures
The internal bond rating measures how well the MDF panel resists delamination under sustained pressure applied perpendicular to the face. In a subwoofer enclosure, every bass transient generates a pressure pulse that pushes outward on every panel simultaneously. A panel that begins to delaminate internally loses stiffness gradually. The symptoms are slow: a box that starts to sound softer, less defined, less punchy over months of use. 200 psi internal bond is the spec that determines how long this enclosure holds its acoustic integrity under daily use at real power levels.
410,000 psi MOE: Less Flex, Less Resonance
The modulus of elasticity measures panel stiffness, its resistance to bending under load. A stiffer panel flexes less under the pressure generated by a high-excursion driver at volume. Panel flex is a source of acoustic coloration: the panel itself begins to radiate sound at its own resonant frequency, adding distortion to the output. 410,000 psi stiffness combined with V-groove and dado joinery means the panels stay rigid and the bracing controls resonance at the structure level, not the panel level. The bass you hear comes from the driver, not the box.
325 lb Face / 250 lb Edge: Joints That Stay Locked
Screw holding strength determines how firmly the panel grips a fastener at the face and at the edge. This matters most at the baffle joint, where the front panel meets the side panels and where the driver is mounted. A panel with low screw holding strength allows fasteners to loosen over time under vibration, leading to air gaps at the joint and loss of acoustic seal. 325 lb face screw holding strength means the baffle hardware stays put. Combined with dado joinery and adhesive, the front panel on a Proline X Performance Series enclosure is not going anywhere.
Named Panel Stock: Not "Premium MDF"
The phrase "premium MDF" or "high-density MDF" appears on marketing copy for enclosures across every price point, from $40 to $400. It is not a specification. It is a description with no defined standard. Langboard Elite is a named, sourced, mill-documented product with published data. We name it in our copy because naming it holds us accountable to the spec. You can look up Langboard Elite independently, verify the numbers on this page, and confirm you are getting what we say you are getting. That is the point.
Why Proline X?
Most enclosures are built to a price point. Proline X is built to a spec. Every box starts with published-data MDF, gets CNC-cut to exact internal volume, and is assembled by hand in our Tennessee facility. The difference shows up in the measurements, and in how the box holds up two years into daily use.
CNC-Cut to Spec
Panels are machine-cut on ShopSabre CNC routers and joined with V-groove and dado joinery. Consistent geometry, no hand-cut variance, no gaps at the joints.
Handcrafted in USA
Hand-assembled at our facility in Tullahoma, TN. Every enclosure is inspected before it ships.
Tuned to the Build
Internal volume and port geometry are calculated to spec and CNC-cut to exact dimensions. The box performs the same way every time.
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