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PEX Dayton Audio UM18 22 18" Ultimax DVC Subwoofer 2 ohms Per Coil P5477565PEX-295-518 https://cdnimages.opentip.com/full/PEX/PEX-295-518.jpg Dayton Audio UM18 22 18" Ultimax DVC Subwoofer 2 ohms Per Coil Manufacturer Part Number: UM18-22Dayton Audio\'s Ultimax Series DVC subwoofers are purpose-built to move tons of air and create clean, articulate, fast bass. Experience the apex of subwoofer design!Key Features: 18\" design for enormous air movement Over 2\" of total cone travel! 1000 watts RMS power handling Dual mirror-imaged linear spiders ensure distortion-free excursion Dual 2 ohm, 2-layer copper voice coils Large vented pole piece and under-spider venting Dayton Audio UM18-22 18\" Ultimax DVC Subwoofer 2 ohms Per CoilIf you want outrageous amounts of bass, you gotta move some airWith 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!An audio bulldozer with the finesse of a sports carLike 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 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.Built to produce massive low frequency output and keep on doing itThe 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 aluminium 12-spoke frame, for stability in any mounting position.Put your home\'s construction to the test with the phenomenal bass output of this 18\" beast!Car audio recommended alignments: Sealed 3 cubic ft. (net internal, not including driver) for an f3 of 32 Hz with a Qtc of .78 Vented 4 cubic ft. (net internal, not including driver or vent ) tuned to 22 Hz, with 2 flared vents 4\" diameter by 32\" long, for an f3 of 24 Hz Home theater/stereo recommended alignments Sealed (home theater/music): 4 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 18 Hz with a Qtc of 0.72 Sealed (music): 7 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 15.8 Hz with a Qtc of 0.62 Vented (home theater): 8 cubic ft. (net internal, not including driver or vent) tuned to 20 Hz, with 3 flared vents 4\" diameter by 28.5\" long, for an f3 of 18 Hz Vented (infra-sub): 12 cubic ft. (net internal, not including driver or vent) tuned to 15.5 Hz, with 3 flared vents 4\" diameter by 32\" long, for an f3 of 15 Hz Infinite Baffle: ApprovedNote: All specifications are derived with voice coils wired in series.Product Details BrandDayton Audio ModelUM18-22 Part Number295-518 UPC848791001062 Unit of MeasureEach Weight44.3 Product Specifications Nominal Diameter18\" Bolt Circle Diameter17.4 Moving Mass Of Diaphragm (Mmd)655 Power Handling (RMS)1000 Watts Power Handling (MAX)2000 Watts Impedance4Ω Frequency Response19 to 500Hz Sensitivity88.6dB 2.83V/1m Voice Coil Diameter3\" Thiele-Small Parameters Resonant Frequency (Fs)19.5Hz DC Resistance (Re)4.4Ω Voice Coil Inductance (Le)2.22mH Mechanical Q (Qms)3.82 Electromagnetic Q (Qes)0.62 Total Q (Qts)0.53 Compliance Equivalent Volume (Vas)7.49ft³ Mechanical Compliance of Suspension (Cms)0.1mm/N BL Product (BL)23.8T·m Maximum Linear Excursion (Xmax)22mm Surface Area of Cone (Sd)1219cm² Materials of Construction Cone MaterialNomex / Glass Fiber Surround MaterialRubber Voice Coil FormerAluminum Basket / Frame MaterialCast Aluminum Magnet MaterialFerrite Mounting Information Overall Outside Diameter18.24\" Baffle Cutout Diameter16.56\" Depth9.625\" # Mounting Holes8 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume4.22ft³ Sealed F331Hz Vented Volume11.79ft³ Vented F316Hz 5477565 848791001062 70.54lbs 0.00 0.00 0.00
Dayton Audio
421.78 2023-07-05 117 In Stock
customer review - by , September 9, 2021
4/ 5stars
Great subwoofer if you only have space or a sealed sub. There are better options if you can fit a giant ported enclosure.Great for home theater only fair for music.
customer review - by , April 4, 2021
5/ 5stars
Well worth the money!
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Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil

stars Rating 4.5 | 2 reviews
Brand Dayton Audio
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Upc: 848791001062
SKU: PEX-295-518
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Product Description

Manufacturer Part Number: UM18-22

Dayton Audio's Ultimax Series DVC subwoofers are purpose-built to move tons of air and create clean, articulate, fast bass. Experience the apex of subwoofer design!

Key Features:
  • 18" design for enormous air movement
  • Over 2" of total cone travel!
  • 1000 watts RMS power handling
  • Dual mirror-imaged linear spiders ensure distortion-free excursion
  • Dual 2 ohm, 2-layer copper voice coils
  • Large vented pole piece and under-spider venting


Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil

If you want outrageous amounts of bass, you gotta move some air

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!

An audio bulldozer with the finesse of a sports car

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 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.

Built to produce massive low frequency output and keep on doing it

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 aluminium 12-spoke frame, for stability in any mounting position.

Put your home's construction to the test with the phenomenal bass output of this 18" beast!

Dayton Audio UM18-22 18" Ultimax DVC Subwoofer 2 ohms Per Coil
Car audio recommended alignments:
    Sealed 3 cubic ft. (net internal, not including driver) for an f3 of 32 Hz with a Qtc of .78
    Vented 4 cubic ft. (net internal, not including driver or vent ) tuned to 22 Hz, with 2 flared vents 4" diameter by 32" long, for an f3 of 24 Hz

Home theater/stereo recommended alignments
    Sealed (home theater/music): 4 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 18 Hz with a Qtc of 0.72
    Sealed (music): 7 cubic ft. (net internal, not including driver) for an f3 of 31 Hz, f10 of 15.8 Hz with a Qtc of 0.62
    Vented (home theater): 8 cubic ft. (net internal, not including driver or vent) tuned to 20 Hz, with 3 flared vents 4" diameter by 28.5" long, for an f3 of 18 Hz
    Vented (infra-sub): 12 cubic ft. (net internal, not including driver or vent) tuned to 15.5 Hz, with 3 flared vents 4" diameter by 32" long, for an f3 of 15 Hz
    Infinite Baffle: Approved


Note: All specifications are derived with voice coils wired in series.

warning tips WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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1 stars
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By Samuel hastings
Date: September 10, 2021
Great subwoofer if you only have space or a sealed sub. There are better options if you can fit a giant ported enclosure.Great for home theater only fair for music.
Rating: 4 stars [4 of 5 Stars!]
By Richard F.
Date: April 01, 2021
Well worth the money!
Rating: 5 stars [5 of 5 Stars!]
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