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Dayton Audio UM8-22 8" Ultimax DVC Subwoofer 2 Ohms Per Coil

Dayton Audio
Part #295-508

Dayton Audio UM8-22 8" Ultimax DVC Subwoofer 2 Ohms Per Coil

Dayton Audio
Part #295-508  
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.
Key Features
  • 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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Overview

Dayton Audio UM8-22 8" Ultimax DVC Subwoofer 2 Ohms Per Coil

Dayton Audio UM8-22 8" Ultimax DVC Subwoofer

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

Key Specs:

  • Nominal Diameter: 8"
  • Power Handling (RMS): 300W
  • Power Handling (MAX): 600W
  • Impedance: Dual Voice Coil,2Ω+2Ω
  • Frequency Response: 30-800Hz
  • Sensitivity: 83.5 dB 2.83V/1m
  • Voice Coil Diameter: 2"
  • Maximum Linear Excursion: 16mm

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We stand behind our products and our warranty is a demonstration of our commitment to quality and reliability.

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Built To Move Some Air

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.

Industry Leading Motor Strength

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.

Unmatched Versatility

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.

Feel Maximum Power On The Road

Build by Demitry K

The Ultimax UM8-22 8" Subwoofer delivers more than enough power to rock the road ways. The sub is a perfect pick to add massive low end to your mobile audio speaker build. If you are looking for fast, articulate bass that really fills your car, look no further than the UM8-22.

Build Your Own Personal Cinema

Build by Adam V.

Not only is the UM8-22 great for car audio, it fits perfectly at home in your theater or listening room. The detailed response and low end strength lets you feel the rumble in your movies and gives you a concert-like music listening experience.

Cabinet Recommendations:

  • Sealed: 0.8 cubic ft. (net internal, not including driver volume) produces an f3 of 43 Hz with a 0.74 Qtc alignment
  • Vented: 1 cubic ft. (net internal, not including driver or port volume) produces an F3 of 25 Hz

Build by Pat M.

Shop the Whole Ultimax Series

UM18-22 18"

  • Nominal Diameter: 18"
  • Frequency Response: 19-500Hz

Shop 18"

UM15-22 15"

  • Nominal Diameter: 15"
  • Frequency Response: 15-1,000Hz

Shop 15"

UM12-22 12"

  • Nominal Diameter: 12"
  • Frequency Response: 20-1,000Hz

Shop 12"

UM10-22 10"

  • Nominal Diameter: 10"
  • Frequency Response: 25-1,000Hz

Shop 10"

Shop All Ultimax Drivers and Kits
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The Dayton Audio UM8-22 Is Used In The Following Kits

Dayton Audio 8" Ultimax Subwoofer and Cabinet Bundle

This compact DIY subwoofer package combines the Dayton Audio Ultimax 8" driver to a matching 0.75 ft.³ knock-down cabinet using all precision CNC-machined panels. Save over $28 off regular retail price when you purchase this package!

Build Your Own 8" Subwoofer

Additional Resources

We pride ourselves on being an authority in the speaker building and DIY community. With over 60 years of combined engineering experience, our team of engineers is here to help with your build. Below are some useful tools to get you started.

Learn More At The Resource Center

Product Details

BrandDayton Audio
ModelUM8-22
Part Number295-508
UPC848791002205
Unit of MeasureEach
Weight11.45

Product Specifications

Nominal Diameter8"
Bolt Circle Diameter7.75
Power Handling (RMS)300 Watts
Power Handling (MAX)600 Watts
Impedance4Ω
Frequency Response30 to 800Hz
Sensitivity83.5dB 2.83V/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)34.3Hz
DC Resistance (Re)4.2Ω
Voice Coil Inductance (Le)0.73mH
Mechanical Q (Qms)2.47
Electromagnetic Q (Qes)0.87
Total Q (Qts)0.64
Compliance Equivalent Volume (Vas)0.59ft³
Mechanical Compliance of Suspension (Cms)0.27mm/N
BL Product (BL)9.2T·m
Diaphragm Mass Inc. Airload (Mms)81.2g
Maximum Linear Excursion (Xmax)16mm
Surface Area of Cone (Sd)211cm²

Materials of Construction

Cone MaterialNomex / Glass Fiber
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerAluminum
Basket / Frame MaterialCast Aluminum
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter8.27"
Baffle Cutout Diameter7.44"
Depth4.7"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.8ft³
Sealed F343Hz
Vented Volume1ft³
Vented F325Hz

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