Dayton Audio Ultimax UM12-22 12" Subwoofer audio components

Product description

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.

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Highlights

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

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Product details

Dayton Audio UM12-22 12" Ultimax DVC Subwoofer 2 ohms Per Coil

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

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 tests the strength of your foundation with fast, articulate, gut-wrenching bass.

The versatility you need for mobile, home, or pro subwoofer excellence

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.

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

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 strong motor takes you to wherever you want to be

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.

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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.

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Specifications

Article number UM12-22

Woofer Series Ultimax Series

Woofer Type Subwoofer

Power Handling (RMS) 600 watts

Power Handling (max) 1,200 watts

Impedance (Z) 2+2 ohms

Sensitivity 86.7 dB @ 2.83V/1m

Frequency Response 20 - 1,000 Hz

Voice Coil Diameter 63.5 mm

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

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

Cone / Diaphragm Material Nomex Cone

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

Sealed Volume 2.0 cubic ft. (net internal) with 1 lbs. of Acousta-Stuf polyfill

Sealed F3

36 Hz with a 0.707 Qtc alignment

Vented Volume

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

Vented F3

19 Hz