15″ Platform 4

The Platform 4 series is a subwoofer that has been designed to deliver the ultimate in daily driving performance. The subwoofer boasts a huge 10″ diameter triple stacked magnet, 10″ diameter linear roll spiders, our huge tall roll high excursion surround, and our largest 3″ voice coil ever! These subwoofers are capable of incredibly high excursion, hair blowing low-frequency output and incredible accuracy. The subwoofers combine huge magnet strength, big xmax, high power handling, and PSI build quality to offer the ultimate high-end SQ subwoofer.

Power Handling Ratings:
Standard RMS Power Handling – 3000 watts
W/ Optional Hi Performance Addition- 3500 watts
Peak Power Handling – 6000 watts
SPL Burp Power – 8,000 watts

Standard version features include:
Massive triple stacked 10″ x 1″ magnets
Chrome top and bottom plates
FEA optimized motor assembly
4/6 Spoke high excursion aluminum cast frame – Black
LARGE Chrome push terminals or 8ga XS-Flex OFC Direct Connect Wiring
Extended length 85mm aluminum flatwound voice coil
Dual 1 and Dual 2 ohm standard impedance
Triple 10″ linear roll poly-cotton spiders
.6″ spider spacing ring
Triple sewn 3mm heavy duty leadwire
Kevlar impregnated pulp cone body
1.5″ tall roll rubberized foam surround

They are manufactured to the strictest standard, and guaranteed to last.
Hand built in the USA!

Our subwoofers are available in two different  performance configurations, Standard and High Performance. The High Performance option will modify the parts used to build the subwoofer to increase the overall power handling and output capability.

The following upgrades would be  applied to the subwoofer if the High Performance option is selected:
Power handling increase from 3000 Watts to 3500 Watts RMS
Quad stiff spider suspension
Quad stitched heavy gauge leadwires

 T/S Parameters for Platform 4 15″:
Revc = 3.81 ohms
Fs = 34.33 Hz
Zmax = 83.14
Qes = 0.35
Qms = 7.75
Qts = 0.33
Le = 5.14 mH
Sd = 830 cm^2
Vas = 1.92 ft^3 / 54.38 L
BL = 29.28
Mms = 387.01 g
Cms = 55.55
Sensitivity = 89.8 dB @1W/1m
Sensitivity = 93.3 dB @2.83Vrms/1m
Xmax = 80mm total
Usable excursion = 3.75″ total

Enclosure Recommendations:
Sealed – 1.35-3.0 ft^3
Ported – 3.25-5.25 ft^3, tuned from 27-36hz

If you would like to customize this series of subwoofer with performance or cosmetic options that are not available in our online store, please submit a
Custom Subwoofer Request.

Physical Specifications for Platform 4 15″:
Rated Diameter 15″ / 380 mm
Overall Diameter 15.5″ / 394 mm
Bolt Hole Circle 14.8″” /  376mm
Cutout Diameter 14.125″ / 358 mm
Mounting Depth 10.675″ / 271 mm
Magnet Diameter 9.85″ / 250 mm
Driver Displacement 0.38 ft.³ / 10.76 L
Shipping Weight 83.0 lb / 36.74 kg

We offer connections to the subwoofer either via spring loaded terminals or direct connect wiring.

Push Terminals are chrome plated, and are marked with a red and black colors to designate the positive and negative terminals. They offer the simplest installation and provide a nice secure connection.

LARGE Push Terminals are made to accept a single 4ga or dual 8ga wires and use a heavy duty, extra-thick tab bolted to the push pin, to which the leadwires from the voice coil are soldered.

Direct Connect wiring offers the very best connection directly from your amplifiers output wiring to the voice coil of your subwoofer. Our direct connect wiring is securely attached to our interwoven braided lead wire via high temperature solder, then covered with heavy duty heat shrink. You can make your connection to the wiring via the twist and tape method, large wire nuts, crimp connectors, or solder.

XS-Flex is the best of the best! A 100% Pure Oxygen Free Tinned Copper wire, with 735 Strand Count and Soft Touch PVC Casing. XS Flex Cable is True AWG cable. The high strand count and soft touch cable jacket allows the wire to be super flexible and easy to use in any installation. XS-Flex is available in BLUE and CLEAR.

XP Flex Cable is also a True AWG cable. It is made up of 10% Oxygen Free Copper(OFC) 90% Copper Clad Aluminum(CCA), with  735 Strand Count and Soft Touch PVC Casing. XP-Flex is available in BLUE, RED and BLACK.

PSI Flex Cable is made to the same exact standards as XP Flex, but is available in PINK only.