Dayton Audio Ultimax UM8-22 Subwoofer

Product description

Dayton Audio's Ultimax Series DVC subwoofers are purpose-built to move air and create clean, articulate, fast bass. Optimized for small enclosures and with over 1-1/4" of throw, the UM8-22 8" subwoofer is perfect for providing deep bass without taking up much space. Experience the apex of subwoofer design.

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Highlights

16 mm xmax makes this one of the highest excursion 8" subwoofers on the market

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

300 watts RMS power handling

Black anodized aluminum former and black pole improves heat dissipation

Dual 2 ohm, 2-layer copper voice coils

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Product details

Dayton Audio UM8-22 8" 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 1-1/4" 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. The thick, one-piece Nomex honeycomb cone is covered with woven, heavy-duty glass fibers creating an ultra-stiff surface that resists 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 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.

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Specifications

Article number UM8-22

Woofer Series Ultimax Series

Woofer Type Subwoofer

Nominal Diameter 8"

Power Handling (RMS) 300 watts

Power Handling (max) 600 watts

Impedance (Z) 2+2 ohms

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

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

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 209"

Overall Depth 143.4"

Baffle Cutout Diameter 197.5"

# Mounting Holes 8

Sealed Volume 0.35 cubic ft. (net internal)

Sealed F3 49 Hz with a 0.8 Qtc alignment

Vented Volume 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

Vented F3 30 Hz