Proline X

Professional Series Ported Dual 15" Enclosure | Memphis Audio MOJO1512

Q: Do I need a subsonic filter?

Yes, at 24 Hz, 24 dB per octave. Below tuning a vented box stops loading the cone and excursion runs away toward DC. With the filter in place this cabinet puts the Memphis Audio MOJO1512 at 52 percent of its usable travel at 3600 W.

Q: Would a sealed box be better for me?

Not one we can show you. We do not build a sealed enclosure for the Memphis Audio MOJO1512, and the sealed volume Memphis prints for it appears word for word on three different Memphis 15 inch sheets, so the Performance Graphs tab carries no ported-versus-sealed chart: the only sealed box left to plot would be this cabinet stuffed and sealed, which nobody would build, and a comparison against it would tell you nothing you could buy. What a vented box gives up is the region below tuning, where the cone unloads and the 24 Hz subsonic filter takes over; around 30.0 Hz the vent carries the load and cone travel drops to its minimum, which no sealed alignment can do.

Q: How does the front port work?

It is a vertical slot beside the woofer, the full height of the cavity, 3.25 inches wide and 53.6 square inches. It runs 10.50 inches to the back wall and turns once along it for 15.81 inches; the fold costs about 1.5 Hz and the port is cut for it. The channel runs at 23.0 metres per second at 3600 W, 55 percent of its turbulence limit, and the mouth edges carry a 1/2 inch roundover so the air leaves the face at 16.6 metres per second against the 17 metres per second threshold where a slot starts to chuff.

Q: What does the price cover, and how does it ship?

76 lb, 44.00" W x 18.00" H x 17.50" D external. It ships as a UPS parcel; the price includes shipping in the 48 states. Every Professional cabinet is priced the same way, by its size: this one is 8.02 cubic feet outside. Do not add polyfill; it ships dry on purpose.

Q: Is the MOJO1512 included?

No. This is an enclosure only, cut for the Memphis Audio MOJO1512 specifically: the 14.050 inch cutout, the 9.650 inch mounting depth allowance and the 3.58 cubic foot alignment all come from Memphis Audio's published parameters. It is one driver with a FLEX impedance jumper: the alignment published here is the 2 ohm setting, and the cabinet passes every gate at 1 ohm too. It is not for the 2025 MJ1512, which uses a 13.81 inch cutout. Bring your own driver.

SKU: Pro 15D-P MOJO1512

QUICK SPECS

Alignment: 3.58 cu ft net vented at 30.0 Hz. F3 36.8 Hz anechoic, 1.80 dB passband ripple
Driver: Memphis Audio MOJO1512 (2 ohm setting), 1500 W RMS, 19.6 mm Xmax, 30.00 Hz Fs
Build: Front-firing standard box, 2.25" three-layer baffle with the woofer flush-mounted in the outer layer, Memphis Audio logo acrylic, dado joinery, 53.6 sq in front slot port beside the woofer with one bend along the back wall, port and excursion gated at 3600 W
Cabinet: 44.00" W x 18.00" H x 17.50" D, 76 lb, threaded insert kit included

Shipping Included No freight charges at checkout on US orders. International orders are quoted live carrier rates at checkout.

Built in Tennessee CNC cut from 3/4" Langboard Elite MDF. V-groove and dado joinery.

Advanced Terminal Cup Built in-house. ABS/Carbon Fiber. Stainless steel hardware. Copper ring terminals.

$ 999.99

In Stock and Ready to Ship

Financing available. Choose Shop Pay Installments at checkout.

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Professional Series Ported Dual 15" Enclosure | Memphis Audio MOJO1512

$ 999.99

Enclosure Type Ported

External Dimensions 44.00" W x 18.00" H x 17.50" D

Net Volume 3.58 cu ft

Tuning Frequency 30.0 Hz

Port Area 53.6 Square Inches

Weight 76 lbs

INSTALLER'S TAKE

I built this one for a pair of MOJO1512s in a single shared chamber, which is how a dual ported box should be built: one volume, one port, both drivers loading the same air.

It gets the full Professional treatment, a 2.25 inch three-layer baffle with both woofers flush mounted in the outer layer, and the port on the left of the face.

Wiring is where a dual bites you. On the 2 ohm setting each MOJO1512 is a 2 ohm load, so the pair lands on 1 ohm in parallel or 4 ohms in series; on the 1 ohm setting it is 0.5 ohm in parallel or 2 ohms in series. Check what your amplifier is rated for before you wire it, not after.

Memphis Audio publishes no mounting hole locations for the MOJO1512, so the inserts are not in the baffle when the box arrives. The insert kit is in the box: set the inserts where the woofer's own holes fall, with the drill bit and the 2.5 inch allen-head screws in the kit, and lay the gasket tape before the woofer goes down.

It ships dry. Do not add polyfill to a ported box. Set your subsonic filter at 24 Hz.

Product Details

Proline X Professional Dual 15" Ported

A ported fifteen inch box for a pair of MOJO1512s, one shared chamber vented at 30.0 Hz

3.58 cu ft net Tuned 30.0 Hz F3 36.8 Hz 2.25" three-layer baffle Cut for the MOJO1512 Built in Tennessee

3.58cu ft net

30.0Hz tuning

36.8Hz F3 anechoic

53.6sq in port area

Why this driver is vented at 30.0 Hz

This cabinet holds two MOJO1512s in 3.58 cubic feet net, vented at 30.0 Hz through a 53.6 square inch port. F3 lands at 36.8 Hz with 1.80 dB of passband ripple. It measures 44.00 inches wide, 18.00 tall and 17.50 deep.

Threaded insert kit ships with this box. Memphis Audio does not publish the mounting hole locations for the MOJO1512, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.

Both drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 53.6 square inches of area at 30.0 Hz, and the design power for the velocity and excursion checks is 3600 W for the pair. Passband ripple holds at 1.80 dB across the tuning, with F3 at 36.8 Hz.

What makes it Professional

Three-layer baffle, flush mount

Three layers of 3/4 inch Langboard Elite make a 2.25 inch front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it carry the mounting hardware and the load.

Memphis Audio logo acrylic

A glossy black acrylic insert with the Memphis Audio mark sits in the outer layer beside the woofer. It is standard on every Professional cabinet.

Threaded insert kit ships with this box

Threaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.

Port gated at 3600 W

The 53.6 square inch slot beside the woofer is sized so the channel runs 23.0 metres per second and the mouth 16.6 metres per second at 1.2 times the driver's rating, under the 17 metres per second where a slot starts to chuff. The channel runs 10.50 inches along its wall and turns once along the back wall for another 15.81 inches, which is why a 30.0 Hz tuning fits a 17.50 inch deep box.

Why this is a Professional build

Every driver is tried in the Performance Optimized ported wedge and down-fire before this chassis, and both of those hold one driver. A pair of MOJO1512s sharing one vented chamber needs the Professional envelope, and this box has the width, depth and port to carry both.

What the price covers

Every Professional cabinet is priced the same way, by its size: this one is 8.02 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a parcel and checkout adds nothing.

The cabinet

44.00" W x 18.00" H x 17.50" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 15 inch Professional envelope, built around the MOJO1512's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.

Port mouth velocity peaks at 16.6 m/s against the 17 m/s point where a slot begins to chuff, and 23.0 m/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Memphis Audio does not publish the mounting hole locations for the MOJO1512, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.

The numbers to respect

Set a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 10.3 mm of its 19.6 mm at 3600 W.

Enclosure Specifications

Series	Proline X Professional
Driver-Specific Fitment	Memphis Audio MOJO1512 2 Ohm (SVC)
Enclosure Type	Ported \| Front-Firing Standard Box
External Width	44.00 Inches
External Height	18.00 Inches
External Depth	17.50 Inches
Internal Volume (Gross)	5.88 Cubic Feet
Internal Volume (Net After Displacement)	3.58 Cubic Feet
Port Type	Vertical Slot Beside The Woofer \| Front Exit \| One 90 Degree Bend Along The Back Wall
Port Geometry	3.25 x 16.50 Inches, 53.6 Square Inches, 33.31 Inches Of Path
Port Area	53.6 Square Inches
Port Tuning (Fb)	30.0 Hz
Port Mouth	1/2 In Roundover On All Four Edges, 74.4 Square Inches At The Face
Port Air Velocity	23.0 m/s In The Channel, 16.6 m/s At The Mouth, At 3600 W (17.0 m/s Chuff Threshold)
Design Power Basis	3600 W RMS (1.2 x The Driver Rating) For Port Velocity And Excursion
Predicted F3	36.8 Hz (Anechoic)
Passband Ripple	1.80 dB (Anechoic)
Subsonic Filter	24 Hz High-Pass, 24 dB/Octave - REQUIRED On A Vented Enclosure
Driver Fs	30.00 Hz
Driver Qts	0.590
Driver Qes / Qms	0.660 / 6.390
Driver Vas	80.873 Liters / 2.856 Cubic Feet
Driver Sd	876.1 Square Centimeters
Driver Mms	387.00 g
Driver BL	15.51
Driver Re	2.0 Ohm
Driver Xmax	20mm (One-Way)
Driver Displacement	0.56 Cubic Feet (Published by Memphis Audio)
Driver Sensitivity	86.8 dB
Driver Power Handling	1500 Watts RMS
Driver Overall Diameter	15.750 Inches (Memphis Audio Spec)
Mounting Depth Required	9.650 Inches (Memphis Audio Spec)
Cutout Diameter	14.050 Inches (Memphis Audio Spec)
Flush Mount Recess	16.750 Inches In The Outer Layer
Material	Langboard Elite 3/4" MDF
Construction	ShopSabre CNC / Windowed Brace Front To Back Beside The Woofer
Joinery	Dado Joinery (CNC-Cut), Flat Panels
Front Baffle Construction	Three 3/4" MDF layers, 2.25" total \| Woofer Flush-Mounted In The Outer Layer
Baffle Layers	3
Acrylic	Glossy Black Memphis Audio Logo Insert, Outer Layer, Standard
Mounting Hardware	Threaded Insert Kit Included: 8-12 Inserts, Drill Bit, 2.5 In Allen-Head Screws, Allen Key, Gasket Tape
Voice Coil Configuration	SVC
Terminal Cup	Proline X ABS/Carbon Fiber Composite \| Back Panel, Terminal-Cup Side \| 12g OFC Pre-Wired
Damping	None - Ships Dry. Polyfill Detunes A Ported Enclosure
Recommended Power	1050-1500 Watts RMS (Memphis Audio Rated: 1500W RMS)
Carpet Finish	Plush Black
Weight	76 lb
Shipping	UPS Ground Parcel, Included In The 48 States
Bundle Options	Enclosure Only (Bring Your Own Memphis Audio MOJO1512)
Warranty	2-Year Limited (Enclosure)
Manufactured	Tullahoma, Tennessee, USA

Performance Graphs

Net airspace

3.58

cu ft

Tuning

30.0

Hz · Fb

Half power

36.8

Hz · F3, anechoic

Xmax at

13068

W RMS · 24 Hz subsonic

With NO filter

2846

W RMS · unfiltered

Port

16.6

m/s at the mouth · 3600 W

01Is this driver right for a ported box?

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

EBP = Fs ÷ Qes = 45.5

Memphis Audio MOJO1512 (2 ohm setting) · EBP 45.5

Under 50 the raw number leans sealed. The Memphis Audio MOJO1512 (2 ohm setting) reads 45.5, so this is a ported build against the grain of its own EBP: it works because the alignment is tuned for in-car response rather than for an anechoic curve, and because the cabinet holds port area and volume the driver can actually use.

02What the box does to it

3.58 cu ft net against a 161.7 L Vas, vented at 30.0 Hz.

Fb = 30.0 Hz · F3 = 36.8 Hz · passband ripple 1.80 dB

Memphis Audio MOJO1512 (2 ohm setting) · Fb 30.0 Hz, F3 36.8 Hz

Anechoic, before any cabin gain, with the 24 Hz subsonic filter already applied. The vent takes over below 30 Hz and the cone stops doing the work there, which is what holds travel down at the bottom of the passband.

03Ported vs Sealed

No sealed comparison is shown for this driver.

A ported-versus-sealed chart is only worth reading against a sealed box someone would actually build: the one we make for the driver, or the one its maker recommends. Neither exists for the Memphis Audio MOJO1512 (2 ohm setting). We do not build a sealed enclosure for it, and the sealed volume Memphis prints for it appears word for word on three different Memphis 15 inch sheets, so rather than compare this cabinet against itself stuffed and sealed, a box no one would build, the comparison is left out.

04The watts that reach Xmax (in this enclosure)

Travel scales with the square root of power, so there is one wattage that puts both cones exactly on Memphis's published 19.6 mm. The two traces are the same cabinet with the subsonic filter switched on and switched off. Every power figure in this section is for the pair, split evenly.

P_Xmax = 13068 W with a 24 Hz subsonic · 2846 W with none → the filter is worth 4.6×

13068 W · subsonic at 24 Hz, 24 dB/oct2846 W · no subsonic filterXmax 19.6 mm one-way, published

Each trace touches the limit and no further, because each is drawn at the exact power that puts the cone on 19.6 mm. With a 24 Hz subsonic that takes 13068 W, reached first at 50 Hz. Take the filter away and the same cabinet reaches 19.6 mm on 2846 W — the filter is worth 4.6× the safe power. A vent unloads the cone below tuning, so there is nothing holding it once the box stops loading: on a sealed build a subsonic filter is an improvement, here it is required equipment. The unfiltered trace is still rising where this chart stops at 20 Hz, so treat 2846 W as a bound rather than a floor. Every wattage on this page is a MECHANICAL limit, not an electrical one. It is the power at which the cone runs out of linear travel in this cabinet, and nothing more. What the voice coil can dissipate as heat is a separate ceiling set by the driver, not by the box — Memphis rate this one at 3000 W RMS, and that is the number that binds first here: heat stops you before travel does, so treat 3000 W as the ceiling and the travel figures above as headroom. Final wired impedance, amplifier output and how long you hold the level are all electrical questions this graph does not answer.

Woofer Details

Materials

Material

Built From a Spec Sheet, Not a Sales Sheet

Every Proline X Professional 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.

Specifications

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

Internal Bond

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.

Stiffness

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.

Screw Holding

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 Professional Series enclosure is not going anywhere.

Sourcing

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.