Proline X
Performance Optimized Down Fire Sealed 10" Enclosure | Morel Ultimo Ti SC102 / SC104
SKU: PO 10-S DF SC
- Alignment: 0.96 cu ft net. SC102 Qtc 0.607, F3 62.8 Hz; SC104 Qtc 0.590, F3 60.4 Hz; height set by the motor, not the airspace
- Driver: SC102 (2 ohm) or SC104 (4 ohm), 600 W RMS, 9.5 mm Xmax, 5.63 in mounting depth
- Standoffs: Included, 1.75 in, shipped uninstalled. Installed height near 8.88 in
- Cabinet: 30.00"W x 15.00"D x 7.13"H in down fire position, excludes standoffs, square corners
Financing available. Choose Shop Pay Installments at checkout.
Performance Optimized Down Fire Sealed 10" Enclosure | Morel Ultimo Ti SC102 / SC104
Proline X Performance Optimized Down Fire 10" Sealed
Cut and tuned for the Morel Ultimo Ti SC102 / SC104
Performance, Performance Optimized, and Micro
Proline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.
| Performance | Performance Optimized | Micro Series | |
|---|---|---|---|
| Fitment | Universal. Accepts any subwoofer that clears the published cutout and mounting depth. | Woofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver. | Woofer specific. Cut for one named subwoofer. |
| Footprint | Sized to the driver diameter. | A shared 30 by 15 inch platform, with cabinet height as the variable. This build sits on that platform at 7.13 inches tall, the height its 5.63 inch motor needs. | Compact per driver footprint. |
| Front baffle | Single, 3/4 inch. | Double, 1.5 inch, outer layer machined as a flush recess. | Double, 1.5 inch. |
| Driver mounting | Solid flange. You drill your own mounting holes. | Threaded inserts pressed to the Morel bolt pattern, stainless machine screws included. | Threaded inserts, stainless machine screws included. |
| Joinery | V-groove and dado, CNC cut. | V-groove and dado, CNC cut, perimeter cross brace. | Stack fab, dowel reinforced. |
| Published alignment | Modeled Qtc profiles across a range of drivers. No single response curve. | A real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters. | Target alignment described in the listing. |
| Carpet | Gray standard, black optional. | Plush black. | Plush black. |
| Warranty | 1 year limited. | 1 year limited. | 2 years. |
Feet ship with every tier, uninstalled on purpose. Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.
This page is a Performance Optimized enclosure. The airspace, the cutout and the cabinet height all come from the driver's own numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.
Built Around the Morel Ultimo Ti SC102 / SC104
Nothing about this cabinet is generic. The baffle is bored to the Ultimo Titanium SC 10's 8.87 inch cutout, 225.15 mm to Morel's sheet, and the airspace lands on 0.96 cubic feet net, the volume the cabinet reaches at the height the 5.63 inch motor requires.
The Ultimo Titanium SC is Morel's 10 inch on a titanium voice coil former and a 5.1 inch Hexatech aluminium coil, rated 600 watts RMS and 2000 watts transient, 5.63 inches deep on a 10.35 inch frame, 9.5 mm of excursion each way. It ships as the SC102 (2 ohm) and the SC104 (4 ohm), and morel measures the two coils separately and publishes a different parameter set for each: the SC102 (2 ohm) at Fs 33.0 Hz, Qts 0.38 and Vas 42.0 liters, the SC104 (4 ohm) at Fs 29.0 Hz, Qts 0.35 and Vas 50.0 liters. The cabinet is sized to the SC102, the coil that asks for the larger box, and the SC104 sits a little below Butterworth in the same airspace.
Net Volume, Not Gross
We build this cabinet at 0.96 cubic feet net, out of 1.05 gross after the brace and Morel's published 2.3 liter driver displacement. The Butterworth volume for the SC102 would be 0.60 cubic feet, but the driver's 5.63 inch mounting depth sets the cabinet's minimum height on this platform and the airspace comes with it: 0.96 cubic feet, still inside Morel's own 13 to 30 liters, 0.46 to 1.06 cubic feet sealed range. The result is a slightly over-damped alignment, Qtc 0.607 for the SC102 and 0.590 for the SC104, with half power at 62.8 and 60.4 Hz.
True net, not marketing net. Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.
| Coil | System Qtc | fc | F3 |
|---|---|---|---|
| SC102, 2 ohm (cabinet sized to this coil) | Qtc 0.607 | 52.7 Hz | 62.8 Hz |
| SC104, 4 ohm | Qtc 0.590 | 48.9 Hz | 60.4 Hz |
Two coils, two parameter sets. Every figure comes from Morel's current Ultimo Titanium SC specification sheet, whose columns reproduce their own moving mass from Vas, cone area and resonance to within a gram. Morel's older printed manual carries a different parameter set for these drivers that does not, and it is not used here.
Down Fire Construction
Cut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.
The cabinet measures 30.00 inches wide by 15.00 inches deep by 7.13 inches tall, measured in the down fire position and excluding standoffs. Plan the space around the installed height rather than the cabinet height: the standoffs hold 1.75 inches under the baffle, so the finished stack sits near 8.88 inches.
Double Baffle, Flush Recess
The front baffle is 1.5 inches, two bonded 3/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3/4 inch of internal clearance.
Side-Mounted Terminal Cup
Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in 12 gauge OFC. Side mounted so it stays accessible with the baffle facing the floor.
Standoffs Included
Morel publishes no front clearance figure for the Ultimo Titanium SC, so this cabinet uses the Proline X standard 1.75 inch standoff, shipped with every enclosure and left uninstalled so you can place them to suit your floor.
Motor Clearance and Orientation
The motor rises off the baffle into the cavity, so on a down fire cabinet the clearance that matters runs to the top panel. The 5.63 inch mounting depth puts the motor 4.13 inches into a 4.88 inch cavity, leaving 0.75 inches above the motor against a 0.75 inch minimum. Height was set by that clearance, not by the airspace: the volume alone would have allowed a lower box.
Morel does not publish a position on down firing this driver, and this cabinet makes no claim on their behalf. The feet ship uninstalled, so if you would rather run it front firing or up firing, that is a decision you can make at install time without changing anything about the enclosure.
Power and Warranty
Morel rates the Ultimo Titanium SC at 600 watts RMS and 2000 watts transient. Both coils are single voice coil drivers: the SC102 is a nominal 2 ohm load (1.3 ohm DC), the SC104 a nominal 4 ohm load (3.0 ohm DC). Confirm the load against your amplifier's minimum stable impedance before powering the system.
The enclosure carries a 1 year limited warranty. Bring your own Morel Ultimo Ti SC102 / SC104; the driver is purchased separately.
Cut for the Driver, Not the Catalog
Built one at a time in Tullahoma, Tennessee, with standoffs and a 1 year limited warranty. Questions on fitment or amplifier matching, call 931-563-5151.
| Specification | Value |
|---|---|
| Series | Proline X Performance Optimized Down Fire |
| Compatible Driver | Morel Ultimo Titanium SC, SC102 or SC104, quantity 1. Direct fit |
| Configuration | Single 10 inch, sealed down fire |
| Mounting Position | Trunk or cargo floor, baffle facing down on standoffs |
| Firing Direction | Downward. Feet ship uninstalled, so front or up firing is also possible |
| External Width | 30.00 in |
| External Depth | 15.00 in |
| External Height | 7.13 in in the down fire position, excludes standoffs |
| Installed Height | 8.88 in including the 1.75 in standoff |
| Internal Volume, Gross | 1.05 cu ft |
| Internal Volume, Net Acoustic | 0.96 cu ft after the brace and Morel's published 2.3 L displacement |
| Height Set By | Driver clearance: the 5.63 in motor, not the airspace |
| Driver Mounting Depth | 5.63 in required, 0.75 in clearance above the motor |
| Morel Published Sealed Range | 13 to 30 liters, 0.46 to 1.06 cubic feet, including driver displacement |
| Alignment, SC102 (2 ohm) | Qtc 0.607, fc 52.7 Hz, F3 62.8 Hz anechoic; the cabinet is sized to this coil |
| Alignment, SC104 (4 ohm) | Qtc 0.590, fc 48.9 Hz, F3 60.4 Hz anechoic, in the same cabinet |
| Woofer Opening | 8.87 in (225.15 mm) direct fit |
| Frame Outer Diameter | 10.35 in (263 mm), Morel spec |
| Bolt Circle | 9.96 in (253 mm), Morel drawing; inserts pressed to it |
| Driver Displacement | 2.3 L / 0.08 cu ft, published by Morel |
| SC102 Fs / Qts / Qes / Qms | 33.00 Hz / 0.38 / 0.48 / 1.75 |
| SC102 Vas / Mms / Cms / BL | 42.00 L / 91.6 g / 0.250 mm/N / 7.06 T-m |
| SC104 Fs / Qts / Qes / Qms | 29.00 Hz / 0.35 / 0.43 / 1.84 |
| SC104 Vas / Mms / Cms / BL | 50.00 L / 101.7 g / 0.300 mm/N / 11.00 T-m |
| Driver Sd | 346 cm2, published by Morel |
| Xmax | 9.5 mm one way, published as plus or minus 9.5 mm each way; 12 mm gap |
| DC Resistance | SC102 1.3 ohm; SC104 3.0 ohm |
| Driver Sensitivity | 88 dB (SC102) and 87 dB (SC104) at 2.83 V, Morel spec; 86.8 and 86.4 dB at 1 W derived from the parameters |
| Driver Power Handling | 600 W RMS / 2000 W transient |
| Wiring Options | Single voice coil: SC102 nominal 2 ohm, SC104 nominal 4 ohm |
| Voice Coil | 130 mm (5.1 in) Hexatech aluminium on a titanium former, 31 mm winding height |
| Parameter Source | Morel Ultimo Titanium SC specification sheet; Morel's 2016 manual prints a different set that is not used |
| Material | Langboard Elite MDF |
| Construction | CNC cut, V-groove and dado joinery, square corners |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in double baffle, outer layer machined as a flush recess |
| Internal Bracing | Windowed brace, dadoed to the shell |
| Driver Mounting Hardware | Threaded inserts pressed to the Morel bolt pattern, stainless machine screws included |
| Terminal Cups | One Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC |
| Standoffs | Included, 1.75 in, shipped uninstalled |
| Damping | Light polyfill wall lining, does not alter acoustic volume |
| Carpet | Plush black |
| Weight | 34 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
0.96 cu ft against a 42.0 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 9.5 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.
| Param | Value | Unit | Note |
|---|---|---|---|
| Fs | 33.00 / 29.00 | Hz | free-air resonance |
| Qts | 0.380 / 0.350 | SC102, 2 ohm / SC104, 4 ohm | |
| Vas | 42.00 / 50.00 | L | equivalent compliance |
| Sd | 346.0 | cm² | effective piston area |
| Xmax | 9.5 | mm | one-way, Morel prints it as plus or minus 9.5 mm each way |
| Pe | 600 | W | continuous RMS |
| SPL | 86.8 | dB | 1 W / 1 m, derived from T/S |
Driver parameters as published by Morel Ultimo Titanium SC specification sheet, morelhifi.com. 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.
Shop By Series
