The Ultimax Series of dual voice coil subwoofers from Dayton Audio is not for the faint of heart. Built using the latest in subwoofer technology, Ultimax subwoofers are the pinnacle of low-frequency driver design. A Ultimax subwoofer tests the strength of your foundation with fast, articulate, gut-wrenching bass.
The versatility you need for mobile, home, or pro subwoofer excellence
Dual 2 ohm voice coils allow for stereo 2 ohm and mono 1-ohm wiring configurations when connecting to high current car audio and professional audio amplifiers to extract maximum power. For home audio applications, wire the voice coils in series for a benign 4-ohm load for greater amplifier compatibility.
Built to produce massive low-frequency output and keep on doing it
To improve power handling, increase thermal management, and reduce power compression, Dayton Audio designed the Ultimax Series with large black anodized formers and vented pole pieces, under-spider ventilation, and two-layer copper voice coils.
Over 1-1/2" of travel (3/4" Xmax) is kept completely linear through the use of dual spiders that also limit distortion and rocking modes. "Tall-boy" rubber surrounds with integrated gaskets maintain driver surface area during extreme excursion moments. Thick, one-piece Nomex honeycomb-covered cones are covered with woven, heavy-duty glass fibers creating ultra-still cones that resist deformation.
A strong motor takes you to wherever you want to be
A large copper sleeve and copper pole cap in the motor reduce energy storage from inductance, with the side benefit of lowering distortion for a "faster" response. Large dual-stacked, high-energy magnets handle the heavy lifting and bring Qts down to a level where Ultimax subwoofers can be used in vented or sealed cabinets and enclosures.Save time, effort, and money! Combine an Ultimax subwoofer and a knockdown enclosure!
A knock-down 2.0 cubic foot subwoofer cabinet built specifically for the Dayton Audio Ultimax 12" subwoofer is available here. Save over $30 off the price of the cabinet when you buy the cabinet and UM12-22 subwoofer (at regular price) together in this package only.
• Sealed 2.0 cubic ft. (net internal) with 1 lbs. of Acousta-Stuf polyfill, f3 of 36 Hz with a 0.707 Qtc alignment
• Vented 4.0 cubic ft. (net internal, not including driver or port volume) tuned to 20 Hz with a 10" wide by 1.5" high slot port that is 25" long, which yields an f3 of 19 Hz
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