UM18-22 18" Ultimax DVC Subwoofer 2 ohm Per Coil

Quick Overview

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!

Product 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 Manuals / Spec Sheets / Downloads

Dayton Audio UM18-22 Specification Sheet
Dayton Audio UM18-22 Graphs/FRD/ZMA Data File

Buying Options

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!

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 1000 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.

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

Cabinet Recommendations:

  • Sealed (home theater/music): 4 cubic ft. (net internal, not including driver volume) produces an f3 of 33 Hz with a 0.85 Qtc alignment
  • Vented: 6 cubic ft. (net internal, not including driver or port volume) produces an f3 of 22 Hz. Larger cabinets and lower tuning frequencies are possible.
  • Check out this UM18-22 review!

    audioXpress Review - February 2017

Speaker Series Ultimax Series
Model Number UM18-22
Color Black
Unit of Measure Each
UPC 848791001062
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 44.3
Speaker Type Subwoofer
Nominal Diameter 18"
Power Handling (RMS) 1,000 watts
Power Handling (max) 2,000 watts
Continuous Program Power --
Impedance 2+2 ohms
Sensitivity 89.5 dB @ 2.83V/1m
Frequency Response 19 - 500 Hz
Voice Coil Diameter 75 mm
Magnet Weight --
DC Resistance (Re) 4.3 ohms
Voice Coil Inductance (Le) 1.5 mH @ 1 kHz
Resonant Frequency (Fs) 26.2 Hz
Mechanical Q (Qms) 4.05
Electromagnetic Q (Qes) 0.85
Total Q (Qts) 0.70
Diaphragm Mass Inc. Airload (Mms) 532g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.07 mm/N
Surface Area Of Cone (Sd) 1,219 cm²
Volume of Displacement (Vd) 2,681 cm³
BL Product (BL) 21.1 Tm
Compliance Equivalent Volume (Vas) 144.7 liters
Maximum Linear Excursion (Xmax) 22 mm
Drivers Mechanical Losses (Rms) --
Cone / Diaphragm Material Nomex Cone
Entry / Exit Diameter --
Surround Material Rubber
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material Cast Aluminum
Magnet Material Ferrite
Overall Outside Diameter 462 mm
Overall Depth 248 mm
Baffle Cutout Diameter 425.5 mm
# Mounting Holes 8
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --