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
We've Got Your Back
We stand behind our products and our warranty is a demonstration of our commitment to quality and reliability.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
- Nominal Diameter: 15"
- Frequency Response: 15-1,000Hz
- Nominal Diameter: 12"
- Frequency Response: 20-1,000Hz
- Nominal Diameter: 10"
- Frequency Response: 25-1,000Hz
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!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.