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Dayton Audio UM18-22 18″ Ultimax DVC Subwoofer
Experience the Apex of Subwoofer Design

With the UM18-22 Ultimax 18″ driver, Dayton Audio has taken everything about the respected Dayton Audio Ultimax subwoofers to the extreme! Providing over 2″ of peak-to-peak excursion, the Ultimax 18 sweeps over six liters of air with each stroke! Truly not for the faint of heart!

Key Specs:

Nominal Diameter: 18″
Power Handling (RMS): 1,000W
Power Handling (MAX): 2,000W
Impedance: 4Ω
Frequency Response: 19-500Hz
Sensitivity: 88.6dB 2.83V/1m
Voice Coil Diameter: 3″
Maximum Linear Excursion: 22mm

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Built To Move Some Air

Like the rest of the Ultimax series, the UM18-22 plays it clean, low, fast, and LOUD. Designed to excel in either sealed or vented enclosures, it features an ultra-powerful triple stack of high-grade ferrite ceramic magnets for ultra-high force and exceptional control, plus dual aluminum shorting rings above and below the magnetic gap for minimized inductance, “faster”-sounding bass response, and perfect magnetic symmetry.

The huge 18″ Nomex honeycomb composite curved cone features woven fiberglass outer skins for the ultimate in rigidity and resistance to damage, while the “tall-boy” rubber surround with integral gasket supports extreme stroke with linearity and durability. Dual 8″ spiders are mirror-imaged, to keep the 2″ of excursion completely linear and provide cancellation of distortion due to compliance asymmetry, for ultra-low mechanical distortion even at the outer limits of travel. And it’s all held in perfect alignment by a rigid cast aluminum 12-spoke frame, for stability in any mounting position.

Unmatched Versatility

The voice coil diameter has been increased to 3 inches, for even more thermal dissipation area that allows the 18″ model to withstand 1,000 watts of punishing bass power continuously without thermal fatigue. Dual 2-ohm voice coils allow for stereo 2 ohm operation, or mono operation in 1 ohm or 4 ohm configurations, for true design flexibility.

Feel Maximum Power On The Road

The Ultimax UM18-22 18″ Subwoofer delivers more than enough power to rock the road ways. The sub is a perfect pick to add massive low end to your mobile audio speaker build. If you are looking for fast, articulate bass that really fills your car, look no further than the UM18-22.

Build Your Own Personal Cinema

Build by Nikolai L.

Not only is the UM18-22 great for car audio, it fits perfectly at home in your theater or listening room. The detailed response and low end strength lets you feel the rumble in your movies and gives you a concert-like music listening experience.

Home Theater/Stereo Recommended Alignments
Sealed (home theater/music): 4 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 18 Hz with a Qtc of 0.72
Sealed (music): 7 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 15.8 Hz with a Qtc of 0.62
Vented (home theater): 8 cubic ft. (net internal, not including driver or vent) tuned to 20 Hz, with 3 flared vents 4″ diameter by 28.5″ long, for an f3 of 18 Hz
Vented (infra-sub): 12 cubic ft. (net internal, not including driver or vent) tuned to 15.5 Hz, with 3 flared vents 4″ diameter by 32″ long, for an f3 of 15 Hz
Infinite Baffle: Approved
Put your home’s construction to the test with the phenomenal bass output of this 18″ beast!

Cabinet Recommendations:
Sealed 3 cubic ft. (net internal, not including driver) for an f3 of 32 Hz with a Qtc of .78
Vented 4 cubic ft. (net internal, not including driver or vent ) tuned to 22 Hz, with 2 flared vents 4″ diameter by 32″ long, for an f3 of 24 Hz