All the subwoofers feature massive triple stacked motor structures across 3 basket types all constructed from cast Aluminium for strength and rigidity. BEST SOUND - Double stitched High roll foam surround and paper composite cone make for lightweight but strong soft parts allowing for massive output from these subwoofers.
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18 Inch 4000W Professional Subwoofer with Double Magnet & 5 Inch Voice Coil - Heavy Duty Outdoor Speaker Box for PA System
Aliexpress UK
Smooth Bluetooth Connection: Allows you to stream your favorite music straight from your smartphone, iPod, tablet or any other suitable BT device within 10M/32 feet. Just move about and keep the music going with no cable and no hassle.
eBay
4000W 2*15" Subwoofer Professional audio Karaoke sets BT sound box PA speaker System active Subwoofer+Array Line Bocina Parlant
Aliexpress UK
The legend returns! The 10-inch KICKER's SoloX® L7X™ Ferrite Competition Subwoofer brings the most advanced bass technology and unprecedented performance, from the guys who invented it for a vehicle. A motor like no other – it includes a massive, triple-stacked ferrite magnet surrounding a hyper-extended pole piece, engineered for an enormous, more linear magnetic field and amazing heat dissipation. It's ultra-deep bass at very high volume. L7X's three-inch voice coil is supported by a dual-spider suspension system, and the double-pressed pulp cone is attached to an ultra-long-throw Santoprene surround - equipped with KICKER's square cone tech and ribbed corners for continuous force and air movement. Heat is the enemy of endurance. To make our subs even more reliable, KICKER engineers.
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Subwoofer 12" Dual 2OHM 4000W Power Double Magnet Car Subwoofer Speaker
Aliexpress UK
Peak Power：4000W. Upgraded Blutooth chip ensures lower consumption and a stable connection between the Bluetooth subwoofer and your smartphone, tablet or other Bluetooth-enabled device. No cable and no hassle.
eBay
Subwoofer 21 Inch 4000w Powerful Top Heavy Sub Pro Sound Bass LF21X451
Aliexpress UK
The MAX S2 will show everyone that you have reached the next level, the MAX level. Only the best and beyond is good enough! We solved the cooling in two different ways. A MAX subwoofer is designed to test the limits and match your dedication in performance and style.
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8000W/6000W/4000W/3000W Portable Bluetooth Speaker Subwoofer Heavy Bass Sound System Party Speakers With Microphone, Remote LOT
Aliexpress UK
Rockville W15K6D2 V2 15" 4000w Peak Car Audio Subwoofer Dual 2-Ohm Sub 1000w .... Used by me for probably 20 hours, bought brand new in 2022 and has been stored inside since removal from car. Now have an 18 inch edge sub so not needed. Can post but very heavy. Perfect working order and very loud, I had this in a 5 cu ft ported box.
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4000W Wireless Speaker with Dual 6.5" Subwoofers, RGB Party Lights, Microphone, Volume Control, USB Rechargeable, TWS & FM Radio
Aliexpress UK
Hifonics 35th Anniversary 4000 watt Brutus Super D-Class™ mono subwoofer amplifier with unique ParaQ™ electronic crossover circuit and diagnostic bass remote included. At very high listening levels, Hifonics amplifiers with Super D-Class circuitry result in lower distortion, higher current efficiencies and less heat than conventional D-Class amplifier designs.
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DASN B4 4000W Peak Audio Portable DJ Party Stage Sound Active Pro Column Speaker Dual 10 inch Subwoofer Home PA system
Aliexpress UK
Bassface Team RED12/1 12" 30cm 2x1Ohm DVC Wide Excursion Competition Subwoofer 3500W RMS (Ported Enclosures). Bassface - In the end all it is about the performance. Manufacturer: Bassface. 3500W Continuous RMS / 7000W Burp Power Handling.
eBay
4000W Dual 6.5 Inch Woofers Wireless Portable Party Speaker With LED Lights, Loud Subwoofer&stereoOutdoor Party
Aliexpress UK