UM12-22 12" Ultimax DVC Subwoofer 2 ohm Per Coil
Thick, one-piece Nomex honeycomb covered cone with woven
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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.
• 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.
• 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|
|Unit of Measure||Each|
|Warranty - Parts||5 Years|
|Warranty - Labor||5 Years|
|Product Shipping Weight (lbs.)||23.0000|
|Power Handling (RMS)||600 watts|
|Power Handling (max)||1,200 watts|
|Continuous Program Power||--|
|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|
|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||--|
|Voice Coil Wire Material||Copper|
|Voice Coil Former||Aluminum|
|Dual Voice Coil||Yes|
|Basket/Frame Material||Cast Aluminum|
|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||--|
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