UM12-22 12" Ultimax DVC Subwoofer 2 ohm Per Coil

Thick, one-piece Nomex honeycomb covered cone with woven

RRP $492.50
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Dayton Audio's Ultimax Series DVC subwoofers are purpose-built to move air and create clean, articulate, fast bass. Experience the apex of subwoofer design.

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.

Over 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 2.0 cubic ft. (net internal) with 1 lbs. of Acousta-Stuf polyfill, f3 of 36 Hz with a 0.707 Qtc alignment

• Vented 4.0 cubic ft. (net internal, not including driver or port volume) tuned to 20 Hz with a 10" wide by 1.5" high slot port that is 25" long, which yields an f3 of 19 Hz

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


• 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
• 600 watts RMS power handling
• Copper shorting rings and cap reduce distortion due to inductance variations
• Dual 2 ohm, 2-layer copper voice coils
• Large vented pole piece and under-spider venting
• Black anodized aluminum former and black pole improves heat dissipation

Speaker Series Ultimax Series
Model Number UM12-22
Color Black
Unit of Measure Each
UPC 844632099250
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 23.0000
Speaker Type Subwoofer
Power Handling (RMS) 600 watts
Power Handling (max) 1,200 watts
Continuous Program Power --
Impedance 2+2 ohms
Sensitivity 86.7 dB @ 2.83V/1m
Frequency Response 20 - 1,000 Hz
Voice Coil Diameter 63.5 mm
Magnet Weight --
DC Resistance (Re) 3.2 ohms
Voice Coil Inductance (Le) 1.25 mH @ 1kHz
Resonant Frequency (Fs) 26.2 Hz
Mechanical Q (Qms) 3.62
Electromagnetic Q (Qes) 0.71
Total Q (Qts) 0.59
Diaphragm Mass Inc. Airload (Mms) 270g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.14 mm/N
Surface Area Of Cone (Sd) 490.9 cm²
Volume of Displacement (Vd) 932.7 cm³
BL Product (BL) 14.2 Tm
Compliance Equivalent Volume (Vas) 46.8 liters
Maximum Linear Excursion (Xmax) 19 mm
Driver's Mechanical Losses (Rms) --
Cone / Diaphragm Material Nomex Cone
Entry / Exit Diameter --
Surround Material Rubber
Voice Coil Wire Material Copper
Voice Coil Former Aluminum
Dual Voice Coil Yes
Basket/Frame Material Cast Aluminum
Magnet Material Ferrite
Overall Outside Diameter 314.5 mm
Overall Depth 191 mm
Baffle Cutout Diameter 272.5 mm
# Mounting Holes 8
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --

SKU 844632099250
Model # UM12-22
Barcode # 844632099250
Brand Dayton Audio
Shipping Weight 11.3170kg
Shipping Width 0.387m
Shipping Height 0.260m
Shipping Length 0.387m
Shipping Cubic 0.039063000m3
Assembled Length 0.387m
Assembled Height 0.260m
Assembled Width 0.387m

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