Dayton Audio 18" Ultimax Subwoofer and Starter Enclosure Package

Sale price$469.90


About the Subwoofer Driver

With the UM18-22 18" Ultimax dual voice coil Subwoofer, 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!

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 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.

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 aluminium 12-spoke frame, for stability in any mounting position.

About the Subwoofer Starter Kit


Consisting of just baffles and bracing, the 18" Subwoofer Starter Kit is the easiest and most cost effective way to build a custom 4.0 cubic foot subwoofer enclosure for novice woodworkers. Accurately cutting a hole and recess for a driver requires a high level of precision and specialized tools which can be difficult for anyone new to woodworking or who does not have space for a full woodshop. Therefore, with a precut double layer 1-1/2" thick front baffle with driver recess and round overs, along with an extensive bracing design, all of the difficult work has been done for you. You just need to cut the remaining the remaining pieces, including 4 20" x 20" pieces of 3/4" MDF for the top bottom and sides, and 1 21.5" x 20" piece 3/4" MDF for the back. If using a table saw you only need to move the fence once to complete the entire enclosure.

During the CNC manufacturing process, rabbets dadoes are cut into the front panel for precise panel alignment. A unique two-piece brace adds superior rigidity without affecting the subwoofer's performance. The result is a resonance-free, sealed subwoofer cabinet. When your friends ask about it, you get the pleasure of saying, "I built it myself!"

Overall Volume: 3.0 cubic feet

Dayton Audio UM18-22 18" Ultimax DVC Subwoofer Specifications:

• Power handling: 1,000 watts RMS/2,600 watts max

• Impedance: 2+2 ohms

• Frequency response: 19-500 Hz

• SPL: 88.6 dB 2.83V/1m

• Fs: 19.5 Hz

• Vas: 7.49 ft³

• Qts: 0.53

• Xmax: 22 mm.

18" Subwoofer Starter Kit Specifications: 

• Panel thickness: 3/4", front baffle is 1-1/2"

• Panel material: Medium Density Fiberboard (MDF)

• Finished net cabinet volume (subtracting the double thick baffle and bracing): 4.0 cubic feet

• External dimensions: 21-1/2" H x 20" W x 22" D

• Mounting depth (mounting baffle to brace): 11-1/2"

• Subwoofer recess: 1/2" deep

• Weight: 17.5 lbs.

• Made in the U.S.A.

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