Professional Series · Datasheet

Professional Series Ported 15" Enclosure Memphis Audio MOJO1512 · Single 15" Ported enclosure

Net volume
2.30 Cubic Feet
Tuning
32.0 Hz
Max mounting depth
9.650 Inches (Memphis Audio Spec)
Cutout
14.050 Inches (Memphis Audio Spec)
External dimensions
36.00 Inches W × 18.00 Inches H × 15.00 Inches D
Front baffle
Three 3/4" MDF layers, 2.25" total | Woofer Flush-Mounted In The Outer Layer
Buy at Audio IntensityFactory-direct, ships from Tullahoma
  • Alignment: 2.30 cu ft net vented at 32.0 Hz. F3 33.0 Hz anechoic, 2.27 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, 41.2 sq in front slot port beside the woofer with one bend along the back wall, port and excursion gated at 1800 W
  • Cabinet: 36.00" W x 18.00" H x 15.00" D, 69 lb, threaded insert kit included

Spec of record

Technical specifications

SeriesProline X Professional
Driver-Specific FitmentMemphis Audio MOJO1512 2 Ohm (SVC)
Enclosure TypePorted | Front-Firing Standard Box
External Width36.00 Inches
External Height18.00 Inches
External Depth15.00 Inches
Internal Volume (Gross)3.95 Cubic Feet
Internal Volume (Net After Displacement)2.30 Cubic Feet
Port TypeVertical Slot Beside The Woofer | Front Exit | One 90 Degree Bend Along The Back Wall
Port Geometry2.50 x 16.50 Inches, 41.2 Square Inches, 36.47 Inches Of Path
Port Area41.2 Square Inches
Port Tuning (Fb)32.0 Hz
Port Mouth1/2 In Roundover On All Four Edges, 61.2 Square Inches At The Face
Port Air Velocity19.7 m/s In The Channel, 13.2 m/s At The Mouth, At 1800 W (17.0 m/s Chuff Threshold)
Design Power Basis1800 W RMS (1.2 x The Driver Rating) For Port Velocity And Excursion
Predicted F333.0 Hz (Anechoic)
Passband Ripple2.27 dB (Anechoic)
Subsonic Filter25 Hz High-Pass, 24 dB/Octave - REQUIRED On A Vented Enclosure
Driver Fs30.00 Hz
Driver Qts0.590
Driver Qes / Qms0.660 / 6.390
Driver Vas80.873 Liters / 2.856 Cubic Feet
Driver Sd876.1 Square Centimeters
Driver Mms387.00 g
Driver BL15.51
Driver Re2.0 Ohm
Driver Xmax20mm (One-Way)
Driver Displacement0.56 Cubic Feet (Published by Memphis Audio)
Driver Sensitivity86.8 dB
Driver Power Handling1500 Watts RMS
Driver Overall Diameter15.750 Inches (Memphis Audio Spec)
Mounting Depth Required9.650 Inches (Memphis Audio Spec)
Cutout Diameter14.050 Inches (Memphis Audio Spec)
Flush Mount Recess16.750 Inches In The Outer Layer
MaterialLangboard Elite 3/4" MDF
ConstructionShopSabre CNC / Two Windowed Braces Front To Back Either Side Of The Woofer
JoineryDado Joinery (CNC-Cut), Flat Panels
Front Baffle ConstructionThree 3/4" MDF layers, 2.25" total | Woofer Flush-Mounted In The Outer Layer
Baffle Layers3
AcrylicGlossy Black Memphis Audio Logo Insert, Outer Layer, Standard
Mounting HardwareThreaded Insert Kit Included: 8-12 Inserts, Drill Bit, 2.5 In Allen-Head Screws, Allen Key, Gasket Tape
Voice Coil ConfigurationSVC
Terminal CupProline X ABS/Carbon Fiber Composite | Back Panel, Terminal-Cup Side | 12g OFC Pre-Wired
DampingNone - Ships Dry. Polyfill Detunes A Ported Enclosure
Recommended Power1050-1500 Watts RMS (Memphis Audio Rated: 1500W RMS)
Carpet FinishPlush Black
Shipping Weight76 lb
ShippingUPS Ground Parcel, Included In The 48 States
Bundle OptionsEnclosure Only (Bring Your Own Memphis Audio MOJO1512)
Warranty2-Year Limited (Enclosure)
ManufacturedTullahoma, Tennessee, USA

Modelled response

Performance in this enclosure

Net airspace
2.30
cu ft
Tuning
32.0
Hz · Fb
Half power
33.0
Hz · F3, anechoic
Xmax at
5806
W RMS · 25 Hz subsonic
With NO filter
1001
W RMS · unfiltered
Port
13.2
m/s at the mouth · 1800 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
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 EBP 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

2.30 cu ft net against a 80.9 L Vas, vented at 32.0 Hz.

Fb = 32.0 Hz  ·  F3 = 33.0 Hz  ·  passband ripple 2.27 dB
20 30 50 70 100 150 200 +4 0 −4 −8 −12 −16 −20 −24 FREQUENCY · Hz LEVEL · dB −3 dB Fb 32.0
Memphis Audio MOJO1512 (2 ohm setting) · Fb 32.0 Hz, F3 33.0 Hz
Anechoic, before any cabin gain, with the 25 Hz subsonic filter already applied. The vent takes over below 32 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 the cone exactly on Memphis's published 19.6 mm. The two traces are the same cabinet with the subsonic filter switched on and switched off.

PXmax = 5806 W with a 25 Hz subsonic  ·  1001 W with none  →  the filter is worth 5.8×
20 30 50 70 100 150 200 0 4 8 12 16 20 24 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 19.6 mm 5806 W reaches Xmax here
5806 W · subsonic at 25 Hz, 24 dB/oct1001 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 25 Hz subsonic that takes 5806 W, reached first at 22 Hz. Take the filter away and the same cabinet reaches 19.6 mm on 1001 W — the filter is worth 5.8× 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 1001 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 1500 W RMS, and that is the number that binds first here: heat stops you before travel does, so treat 1500 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.

From the shop floor

Installer's take

I built this box for the MOJO1512 on the full Professional chassis: three layers of baffle with the frame flush in the outer one, and a 2.50 inch slot beside the woofer that turns once along the back wall.

The FLEX jumper does not change the box. I solved it at the 2 ohm setting and checked it at 1 ohm, and both clear every gate at 1800 watts; the 1 ohm setting just runs a little peakier through the passband.

On the 2 ohm setting the driver is a 2 ohm load, on the 1 ohm setting a 1 ohm load. Only use 1 ohm on an amplifier rated for it.

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 25 Hz.

Before you order

Questions

Why is this enclosure tuned to 32.0 Hz?

Memphis's MOJO sheet gives the MOJO1512 Fs 30 Hz, Vas 2.86 cubic feet and 387 grams of moving mass, and those agree with its own compliance and cone area to within a few percent. The FLEX jumper changes only the electrical side, Qts 0.59 at the 2 ohm setting and 0.69 at 1 ohm, so the cabinet is solved at 2 ohms and checked at 1. At 2 ohms F3 is 33.0 Hz with 2.27 dB of passband ripple, at 1 ohm 33.1 Hz with 3.20 dB, and with cabin gain the curve holds within 0.87 dB from 25 to 60 Hz. At 1800 watts, 1.2 times the rating, the cone uses 10.9 of its 19.6 millimetres and the port mouth runs 13.2 metres per second, under the 17 where a slot starts to chuff. Tuning is chosen for in-car response rather than an anechoic curve: a vehicle adds roughly 12 dB per octave below about 45 Hz, and this tuning is where that sum comes out flattest across 25 to 60 Hz.

Why is this a Professional build and not a Performance Optimized box?

The Professional line is the full-size, front-firing option rather than a trunk wedge. This chassis is a full-size front-firing box on a 2.25 inch baffle built from three 3/4 inch layers with the woofer flush-mounted in the outer layer, a Memphis Audio logo acrylic, and a port and excursion budget checked at 1800 W. It carries a 2 year warranty, against 1 year on the Performance Optimized lines.

Threaded inserts or a kit?

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 one kit.

Do I need a subsonic filter?

Yes, at 25 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 56 percent of its usable travel at 1800 W.

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 25 Hz subsonic filter takes over; around 32.0 Hz the vent carries the load and cone travel drops to its minimum, which no sealed alignment can do.

How does the front port work?

It is a vertical slot beside the woofer, the full height of the cavity, 2.50 inches wide and 41.2 square inches. It runs 8.75 inches to the back wall and turns once along it for 21.47 inches; the fold costs about 1.5 Hz and the port is cut for it. The channel runs at 19.7 metres per second at 1800 W, 44 percent of its turbulence limit, and the mouth edges carry a 1/2 inch roundover so the air leaves the face at 13.2 metres per second against the 17 metres per second threshold where a slot starts to chuff.

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

69 lb, 36.00" W x 18.00" H x 15.00" 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 5.62 cubic feet outside. Do not add polyfill; it ships dry on purpose.

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 2.30 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.

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