KIT Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil

Manual

Assembly manual

Build the ultimate subwoofer capable of moving over six liters of air with each stroke! Truly not for the faint of heart! CNC-machined subwoofer cabinet and the Dayton Audio UM18-22 18" subwoofer.

Highlights

113 litres CNC-cut cabinet made of 3/4" MDF panels with a 1-1/2" thick front baffle

18" driver with over 2" of total cone travel to move up to 6 liters of air

Product Details

Denovo Audio 18" Ultimax | DIY Kit | Component and Cabinet

This particular cabinet is designed specifically for the Dayton Audio 18" Ultimax subwoofer, but works for any subwoofer with an overall diameter of 18-1/4" or less, and a cutout requirement of 16-3/4" or less. For optimum performance with the Ultimax 18" subwoofer, add four pounds of Acousta-Stuf polyfill for a Qtc of 0.707 and an f3 of 27 Hz. More info about the subwoofer can be found on the UM18-22 18" product page.

During the CNC manufacturing process, rabbets and dadoes are cut into the back panel for precise panel alignment. A unique two-piece brace adds superior rigidity without affecting the subwoofer's performance. Both side panels feature 3/4" rabbeted extensions with recesses to perfectly install the first piece of the two-part, double thick baffle. Plate amplifier installation is made easy by following the scribed interior guide with a jig saw and by modifying one of the braces.

The end result is a resonance-free, sealed subwoofer cabinet that is purpose-built to extract the best performance from Dayton Audio's 18" Ultimax subwoofer. All that's left to do is finish it to match your décor or paint it to stand out. When your friends ask about it, you get the pleasure of saying, "I built it myself!"

Dayton Audio’s Ultimax Series DVC subwoofers are purpose-built to move tons of air and create clean, articulate, fast bass. Experience the apex of subwoofer design!

Highlights

• 18" design for enormous air movement
• Over 2" of total cone travel!
• 1000 watts RMS power handling
• Dual mirror-imaged linear spiders ensure distortion-free excursion
• Dual 2 ohm, 2-layer copper voice coils
• Large vented pole piece and under-spider venting

Product Details

Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil

If you want outrageous amounts of bass, you gotta move some air

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!

An audio bulldozer with the finesse of a sports car

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.

Built to produce massive low frequency output and keep on doing it

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.

Put your home's construction to the test with the phenomenal bass output of this 18" beast!

Car audio recommended alignments:

• 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

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 (reaction force cancellation recommended)

Note: All specifications are derived with voice coils wired in series.

PRODUCT SPECIFICATIONS

THIELE-SMALL PARAMETERS

MATERIALS OF CONSTRUCTION

MOUNTING INFORMATION

OPTIMUM CABINET SIZE (DETERMINED USING BASSBOX 6 PRO HIGH FIDELITY SUGGESTION)