12″ Platform 3

(9 customer reviews)

From: $669.99

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The Platform 3 series is a massive subwoofer, designed for massive amounts of output! The standard version of the Platform 3 is geared towards very loud, but still very musical systems. It is designed to deliver everything from low octave, window flexing bass to throat tickling upper range bass frequencies. These subs deliver very good sound at very high SPL levels!

Power Handling Ratings:
Standard RMS Power Handling – 2500 watts
W/ Optional Hi Performance Addition- 3000 watts
Peak Power Handling – 6000 watts
SPL Burp Power – 8000

Standard version features include:
Massive dual stacked 9″ x 1″ magnets
Chrome top and bottom plates
FEA optimized motor assembly
12 spoke aluminum cast frame – Black
Chrome push terminals or 8ga XP-Flex CCA Direct Connect Wiring
Extended length 83mm aluminum flatwound voice coil
Dual 1 and Dual 2 ohm standard impedance
Triple 8″ progressive roll poly-cotton spiders
Dual sewn 3mm heavy duty leadwire
Kevlar impregnated pulp cone body
1.5″ wide roll rubberized foam surround

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

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 2500 Watts to 3000 Watts RMS
Quad stiff spider suspension
Triple stitched heavy gauge leadwires

 

 T/S Parameters for Platform 3 12″:
Revc = 3.90 ohms
Fs = 32.65 Hz
Zmax = 103.34
Qes = 0.25
Qms = 5.77
Qts = 0.24
Le = 4.53 mH
Sd = 490 cm^2
Vas = 1.30 ft^3 / 36.80 L
BL = 27.38
Mms = 212.89 g
Cms = 111.65
Sensitivity = 88.8 dB @1W/1m
Sensitivity = 91.5 dB @2.83Vrms/1m
Xmax = 60mm total
Usable excursion = 3″ total

Enclosure Recommendations:
Sealed – This model is not recommended for sealed enclosures.
Ported – 1.65-2.5 ft^3, tuned from 30-36hz

This product may also be used in Bandpass applications. Please contact us before purchasing this product for these installations to make sure that the standard parts will be compatible with your enclosure.

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 3 12″:
Rated Diameter 12″ / 300 mm
Overall Diameter 12.5″ / 318 mm
Bolt Hole Circle 11.27″ / 286 mm
Cutout Diameter 11.125″ / 282.5 mm
Mounting Depth 7.5″ / 191 mm
Magnet Diameter 8.7″ / 220 mm
Driver Displacement 0.22 ft.³ / 6.22 L
Shipping Weight 59 lb / 26.76 kg

dimensions

Polypropylene Dome (Small)

Carbon Fiber Dome (Small)

Full Cone Cover (Small)

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.

Standard Push Terminals are made to accept a single 8ga wire and use a tab soldered directly to the push pin, to which the leadwires from the voice coil are soldered.
standard-terminal

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. large-terminals

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.

direct-connect

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.

9 reviews for 12″ Platform 3

  1. Charles rickard

    had 2 of these in my trunk on a bc5500 at .35 daily. subs never got hot and performed well. 3krms but I put 3500 clean to ea of them daily

  2. Robert Layton

    I bought my two PSi 12″ Platform 3s from a teammate after running about half a dozen other brands within a two or three year period and I was blown away. The way these subs get down is seriously impressive, playing down to 20hz in a 6th order hasn’t even been an issue for me. I take a lot of pride seeing the look on faces when they find out the wind they feel is only two 12s.

  3. Carlos

    Awsome subwoofer beefy and well constructed, hits accurately and hits hard.

  4. Joseph Smith

    Nasty little 12s. Running 2 pf3 hp 12s in a 2 to 1 4th order in a 06 Pontiac grand prix gtp. Best set of 12s I have ever had.

  5. Carson Broadhead (verified owner)

    Bought a 12” platform 3 Hp it’s hands down a straight beast rattling my Yukon to bits flexes wipers, and windows which I never thought possible for a single 12 to do and I couldn’t be happier , still have room for another 1000 watts before full rms is the best part too 😎🔥

  6. Mike Leach (verified owner)

    PSi subs are hands down the best you can buy…single 12 floating the front wipers on my 2011 Yukon xl Denali.

  7. Mike Leach (verified owner)

    I went from the platform 2 to the platform 3 and wow huge difference…well worth the upgrade…I’ll update after putting a starpower 5k to it

  8. Joshua Robinson (verified owner)

    I have 2 platform 3 in a 5 cubic foot any tuned to 32 hz on 5k and they sound amazing!

  9. Brian Pittman

    Psi platform 3 I absolutely love this sub bangs like you wouldn’t believe sounds great but moving around one day the basket broke on me all the way around that’s only weak spot . now it’s going to cost me Fortune to get the thing fixed so it’s going to be a while before I can hear it again. Don’t have much money be a while

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