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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 Data Files

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!

Car audio recommended alignments:
• Sealed 3 cubic ft. (net internal, not including driver) for an f3 of 28 Hz with a Qtc of .8
• 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 27 Hz, f10 of 18 Hz with a Qtc of 0.7
• Sealed (music): 7 cubic ft. (net internal, not including driver) for an f3 of 26 Hz, f10 of 15.8 Hz with a Qtc of 0.76
• 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, 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.

Check out this UM18-22 review!

audioXpress Review - February 2017

Speaker SeriesUltimax Series
Model NumberUM18-22
List Price $363.99
ColorBlack
Unit of MeasureEach
UPC848791001062
Warranty - Parts5 Years
Warranty - Labor5 Years
Product Shipping Weight (lbs.)44.3
Speaker TypeSubwoofer
Nominal Diameter18"
Power Handling (RMS)

1

000 watts

Power Handling (max)

2

000 watts

Continuous Program Power--
Impedance4 ohms
Sensitivity88.6 dB @ 2.83V/1m
Frequency Response19 - 500 Hz
Voice Coil Diameter75 mm
Magnet Weight--
DC Resistance (Re)4.4 ohms
Voice Coil Inductance (Le)2.22 mH @ 1 kHz
Resonant Frequency (Fs)19.5 Hz
Mechanical Q (Qms)3.82
Electromagnetic Q (Qes)0.62
Total Q (Qts)0.53
Diaphragm Mass Inc. Airload (Mms)655g
Moving Mass Of Diaphragm (Mmd)--
Mechanical Compliance of Suspension (Cms)0.1 mm/N
Surface Area Of Cone (Sd)

1

219 cm²

Volume of Displacement (Vd)

2

681.8 cm³

BL Product (BL)23.8 Tm
Compliance Equivalent Volume (Vas)212 liters
Maximum Linear Excursion (Xmax)22 mm
Drivers Mechanical Losses (Rms)--
Cone / Diaphragm MaterialNomex Cone
Entry / Exit Diameter--
Surround MaterialRubber
Voice Coil Wire Material--
Voice Coil Former--
Basket/Frame MaterialCast Aluminum
Magnet MaterialFerrite
Overall Outside Diameter18.5"
Overall Depth9"
Baffle Cutout Diameter17"
# Mounting Holes8
Mounting Hole Diameter--
Bolt Circle Diameter--
Product Weight--
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