UM8-22 8" Ultimax DVC Subwoofer 2 Ohms Per Coil
Thick, one-piece Nomex honeycomb covered cone with woven
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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 1-1/4" of travel (.67" 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.
Cabinet recommendations:• Sealed 0.35 cubic ft. (net internal), f3 of 49 Hz with a 0.8 Qtc alignment
• Vented 0.75 cubic ft. (net internal, not including driver or port volume) tuned to 30 Hz with a 10" wide by 1" high slot port that is 30" long, which yields an f3 of 30 Hz
Note: All parameters derived with voice coils wired in series.
• Dual linear stiffness spiders limit distortion and rocking modes
• Tall-boy rubber surround for extra-long linear excursion without reducing cone surface area
• Black anodized aluminum former and black pole improves heat dissipation
• 300 watts RMS power handling
• Large vented pole piece and under-spider venting
• Dual 2 ohm, 2-layer copper voice coils
|Speaker Series||Ultimax Series|
|Unit of Measure||Each|
|Warranty - Parts||5 Years|
|Warranty - Labor||5 Years|
|Product Shipping Weight (lbs.)||15.0000|
|Power Handling (RMS)||300 watts|
|Power Handling (max)||600 watts|
|Continuous Program Power||--|
|Sensitivity||84.2 dB @ 2.83V/1m|
|Frequency Response||30 - 800 Hz|
|Voice Coil Diameter||2"|
|DC Resistance (Re)||4.2 ohms|
|Voice Coil Inductance (Le)||1.14 mH|
|Resonant Frequency (Fs)||31.6 Hz|
|Mechanical Q (Qms)||2.51|
|Electromagnetic Q (Qes)||0.75|
|Total Q (Qts)||0.58|
|Diaphragm Mass Inc. Airload (Mms)||74.5g|
|Moving Mass Of Diaphragm (Mmd)||--|
|Mechanical Compliance of Suspension (Cms)||0.33 mm/N|
|Surface Area Of Cone (Sd)||211.2 cm²|
|Volume of Displacement (Vd)||359.1 cm³|
|BL Product (BL)||9.1 Tm|
|Compliance Equivalent Volume (Vas)||21.30 liters|
|Maximum Linear Excursion (Xmax)||16.0 mm|
|Driver's Mechanical Losses (Rms)||--|
|Cone / Diaphragm Material||Nomex Cone|
|Entry / Exit Diameter||--|
|Voice Coil Wire Material||Copper|
|Voice Coil Former||Aluminum|
|Basket/Frame Material||Cast Aluminum|
|Overall Outside Diameter||209"|
|Baffle Cutout Diameter||197.5"|
|# Mounting Holes||8|
|Mounting Hole Diameter||--|
|Bolt Circle Diameter||--|
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