Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil
Dayton Audio UM18-22 18" Ultimax DVC Subwoofer
Experience the Apex of Subwoofer Design
With the UM18-22 Ultimax 18" driver, Dayton Audio has taken everything about the respected Dayton Audio Ultimax subwoofers to the extreme! Providing over 2" of peak-to-peak excursion, the Ultimax 18 sweeps over six liters of air with each stroke! Truly not for the faint of heart!
Key Specs:
- Nominal Diameter: 18"
- Power Handling (RMS): 1,000W
- Power Handling (MAX): 2,000W
- Impedance: 4Ω
- Frequency Response: 19 - 500Hz
- Sensitivity: 89.5 dB 2.83V/1m
- Voice Coil Diameter: 3"
- Maximum Linear Excursion: 22mm
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Built To Move Some Air
Like the rest of the Ultimax series, the UM18-22 plays it clean, low, fast, and LOUD. Designed to excel in either sealed or vented enclosures, it features an ultra-powerful triple stack of high-grade ferrite ceramic magnets for ultra-high force and exceptional control, plus dual aluminum shorting rings above and below the magnetic gap for minimized inductance, "faster"-sounding bass response, and perfect magnetic symmetry.
The huge 18" Nomex honeycomb composite curved cone features woven fiberglass outer skins for the ultimate in rigidity and resistance to damage, while the "tall-boy" rubber surround with integral gasket supports extreme stroke with linearity and durability. Dual 8" spiders are mirror-imaged, to keep the 2" of excursion completely linear and provide cancellation of distortion due to compliance asymmetry, for ultra-low mechanical distortion even at the outer limits of travel. And it's all held in perfect alignment by a rigid cast aluminum 12-spoke frame, for stability in any mounting position.
Unmatched Versatility
The voice coil diameter has been increased to 3 inches, for even more thermal dissipation area that allows the 18" model to withstand 1,000 watts of punishing bass power continuously without thermal fatigue. Dual 2-ohm voice coils allow for stereo 2 ohm operation, or mono operation in 1 ohm or 4 ohm configurations, for true design flexibility.
Feel Maximum Power On The Road
Build by ItsGary
The Ultimax UM18-22 18" 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 UM18-22.
Build Your Own Personal Cinema
Build by Nikolai L.
Not only is the UM18-22 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.
Put your home's construction to the test with the phenomenal bass output of this 18" beast!
Cabinet Recommendations:
- Sealed (home theater/music): 4 cubic ft. (net internal, not including driver volume) produces an f3 of 33 Hz with a 0.85 Qtc alignment
- Vented: 6 cubic ft. (net internal, not including driver or port volume) produces an f3 of 22 Hz. Larger cabinets and lower tuning frequencies are possible.
Build by Aaron W.
Shop the Whole Ultimax Series
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"
UM8-22 8"
Nominal Diameter: 8"
Frequency Response: 30-800Hz
Shop 8"
Shop All Ultimax Drivers and Kits
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The Dayton Audio UM18-22 Is Used In The Following Kits
Dayton Audio 18" Ultimax Subwoofer and Cabinet Bundle
Build the ultimate subwoofer capable of moving over six liters of air with each stroke! Truly not for the faint of heart! CNC-machined subwoofer cabinet and the Dayton Audio UM18-22 18" subwoofer. Save over $45.00 off the original price when you buy this package.
Build Your Own 18" 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 | |
|---|---|
| Brand | Dayton Audio |
| Model | UM18-22 |
| Part Number | 295-518 |
| UPC | 848791001062 |
| Unit of Measure | Each |
| Weight | 44.3 |
Product Specifications | |
|---|---|
| Nominal Diameter | 18" |
| Bolt Circle Diameter | 17.4 |
| Power Handling (RMS) | 1000Watts |
| Power Handling (MAX) | 2000Watts |
| Impedance | 4Ω |
| Frequency Response | 19 to 500Hz |
| Sensitivity | 89.5dB 2.83V/1m |
| Voice Coil Diameter | 3" |
Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 26.2Hz |
| DC Resistance (Re) | 4.3Ω |
| Voice Coil Inductance (Le) | 1.5mH |
| Mechanical Q (Qms) | 4.05 |
| Electromagnetic Q (Qes) | 0.85 |
| Total Q (Qts) | 0.7 |
| Compliance Equivalent Volume (Vas) | 5.11ft³ |
| Mechanical Compliance of Suspension (Cms) | 0.07mm/N |
| BL Product (BL) | 21.1T·m |
| Diaphragm Mass Inc. Airload (Mms) | 532g |
| Maximum Linear Excursion (Xmax) | 22mm |
| Surface Area of Cone (Sd) | 1219cm² |
Materials of Construction | |
|---|---|
| Cone Material | Nomex / Glass Fiber |
| Surround Material | Rubber |
| Voice Coil Former | Aluminum |
| Basket / Frame Material | Cast Aluminum |
| Magnet Material | Ferrite |
Mounting Information | |
|---|---|
| Overall Outside Diameter | 18.25" |
| Baffle Cutout Diameter | 16.75" |
| Depth | 10.25" |
| # Mounting Holes | 8 |
Parts Express Staff Recommended Enclosure Volume | |
|---|---|
| Sealed Volume | 4ft³ |
| Sealed F3 | 33Hz |
| Vented Volume | 6ft³ |
| Vented F3 | 22Hz |
