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UM10-22 10" Ultimax DVC Subwoofer 2 ohm Per Coil

Quick Overview

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

Product Highlights

  • Dual 2 ohm, 2-layer copper voice coils
  • Large vented pole piece and under-spider venting
  • 500 watts RMS power handling
  • Black anodized aluminum former and black pole improves heat dissipation
  • Thick, one-piece Nomex honeycomb covered cone with woven heavy-duty glass-fiber
  • Tall-boy rubber surround for extra-long linear excursion without reducing cone surface area
  • Dual linear stiffness spiders limit distortion and rocking modes

Product Manuals / Spec Sheets / Downloads

Dayton Audio UM10-22 Specification Sheet
Dayton Audio UM10-22 Data Files

The Ultimax Series of dual voice coil subwoofers, from Dayton Audio, are not for the faint of heart. Built using the latest in subwoofer technology, Ultimax subwoofers are the pinnacle of low frequency driver design. An Ultimax subwoofer test the strength of your foundation with fast, articulate, gut-wrenching bass.

Dual 2 ohm voice coils allow for stereo 2 ohm and mono 1 ohm wiring configurations when connecting to high current car audio and professional audio amplifiers to extract maximum power. For home audio applications, simply wire the voice coils in series for a benign 4 ohm load for greater amplifier compatibility.

To improve power handling, increase thermal management, and reduce power compression, Dayton Audio designed the Ultimax Series with large black anodized formers and vented pole pieces, under-spider ventilation, and two-layer copper voice coils.

Nearly 1-1/2" of travel (3/4" Xmax) is kept completely linear through the use of dual spiders that also limit distortion and rocking modes. "Tall-boy" rubber surrounds with integrated gaskets maintain driver surface area during extreme excursion moments. Thick, one-piece Nomex honeycomb covered cones are covered with woven, heavy-duty glass fibers creating ultra-still cones that resist deformation.

A large copper sleeve and copper pole cap in the motor reduce energy storage from inductance, with the side benefit of lowering distortion for "faster" response. Large dual-stacked, high-energy magnets handle the heavy lifting and bring Qts down to a level where Ultimax subwoofers can be used in vented or sealed cabinets and enclosures.

Cabinet recommendations:
• Sealed 0.63 cubic ft. (net internal), f3 of 45 Hz with a 0.707 Qtc alignment
• Vented 1.75 cubic ft. (net internal, not including driver or port volume) tuned to 25 Hz with a 10" wide by 1" high slot port that is 24" long, which yields an f3 of 23 Hz

Note: All parameters derived with voice coils wired in series.

Speaker SeriesUltimax Series
Model NumberUM10-22
List Price $207.99
Unit of MeasureEach
Warranty - Parts5 Years
Warranty - Labor5 Years
Product Shipping Weight (lbs.)22
Speaker TypeSubwoofer
Power Handling (RMS)500 watts
Power Handling (max)


000 watts

Continuous Program Power--
Impedance2+2 ohms
Sensitivity84.8 dB @ 2.83V/1m
Frequency Response

25 - 1

500 Hz

Voice Coil Diameter63.5 mm
Magnet Weight--
DC Resistance (Re)3.2 ohms
Voice Coil Inductance (Le)1.28 mH @ 1 kHz
Resonant Frequency (Fs)26.9 Hz
Mechanical Q (Qms)3.08
Electromagnetic Q (Qes)0.59
Total Q (Qts)0.49
Diaphragm Mass Inc. Airload (Mms)227g
Moving Mass Of Diaphragm (Mmd)--
Mechanical Compliance of Suspension (Cms)0.15 mm/N
Surface Area Of Cone (Sd)327.8 cm²
Volume of Displacement (Vd)622.8 cm³
BL Product (BL)14.5 Tm
Compliance Equivalent Volume (Vas)23.5 liters
Maximum Linear Excursion (Xmax)19 mm
Drivers Mechanical Losses (Rms)--
Cone / Diaphragm MaterialNomex Cone
Entry / Exit Diameter--
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerAluminum
Basket/Frame MaterialCast Aluminum
Magnet MaterialFerrite
Overall Outside Diameter273.5 mm
Overall Depth178 mm
Baffle Cutout Diameter236.7 mm
Mounting Hole Diameter--
Bolt Circle Diameter--
Product Weight--