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NEW Dayton Audio UMII12-22 Ultimax II 12" DVC Subwoofer 2 Ohm Per Coil

Dayton Audio
Part #295-712

NEW Dayton Audio UMII12-22 Ultimax II 12" DVC Subwoofer 2 Ohm Per Coil

Dayton Audio
Part #295-712  
Model: UMII12-22
Introducing the UMII12-22 Ultimax II 12" Carbon Fiber Cone subwoofer from Dayton Audio. Building on the success of their predecessor, these subwoofers have been meticulously engineered to surpass expectations. With improved excursion capability, lower distortion, higher power handling, better efficiency, and increased output, the Ultimax II subwoofers elevate your audio experience to new depths. Immerse yourself in rich, booming bass that will shake you to the core. Dayton Audio continues to redefine the boundaries of excellence with the UMII12-22 subwoofer.
Key Features
  • A large aluminum shorting cap and sleeve help keep inductance linear to guarantee minimal distortion
  • The rigid yet lightweight woven carbon fiber cone delivers quick, detailed, and accurate response
  • With ±22 mm xmax, you can expect powerful and deep bass response, taking your audio experience to the next level
  • Equipped with a 4-layer 3" flat wound voice coil that can handle up to 800 watts RMS
  • The frame and motor include extensive venting ensuring efficient heat dissipation for consistent and reliable operation, while minimizing power compression
  • Dual spiders maintain cone linearity even at extremely high excursion levels, providing peak audio performance at all times
  • Optimized for compact sealed enclosures, but capable of exceptional low frequency extension in vented designs - offering you the freedom to create the perfect audio setup
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Overview

Dayton Audio UMII12-22 Ultimax II 12" DVC Subwoofer 2 Ohm Per Coil

Dayton Audio UMII12-22 12" Ultimax II DVC Subwoofer

Introducing the Dayton Audio UMII12-22 Ultimax II 12" carbon fiber cone subwoofer - the ultimate powerhouse for all your bass needs. Built with cutting-edge technology, meticulous design, and a relentless pursuit of perfection, this subwoofer is here to redefine your audio experience. Offering deeper, cleaner, and more detailed bass with unrivaled authority, the UMII12-22 is engineered to bring your music, movies, and games to life like never before. With improved excursion capability, lower distortion, higher power handling capabilities, greater efficiency, and increased output, this subwoofer is an unstoppable force that will leave you breathless. No matter if you're a home theater enthusiast, a car audio aficionado, or a devout audiophile, the Dayton Audio Ultimax II is the obvious choice for those who crave earth-shaking sound.

Don't settle for less when it comes to bass - embrace the power, precision, and impact offered by the Dayton Audio UMII12-22. Elevate your audio experience and immerse yourself in a world of deep, thunderous bass that will shake you to your core. Upgrade your system today and feel the full potential of what exceptional subwoofer technology can deliver. The Dayton Audio UMII12-22 Ultimax II, the subwoofer that sets the new standard for bass performance.

Key Specs:

  • Nominal Diameter: 12"
  • Power Handling (RMS): 800W
  • Power Handling (MAX): 1,600W
  • Impedance: 2Ω + 2Ω (Dual voice coils)
  • Frequency Response: 22- 400 Hz
  • Sensitivity: 88.6 dB 2.83V/1m
  • Voice Coil Diameter: 3"
  • Maximum Linear Excursion: ±22 mm

UMII12-22 Spec Sheet

Built for Extension, Output, and Versatility

Like you have come to expect from the original Ultimax drivers, the UMII12-22 delivers nothing short of exceptional performance. This powerhouse of a driver is built to impress with its deep, clean, fast, and powerful low frequency output. Equipped with a carbon fiber cone, rigid cast aluminum frame, dual spiders, 3" flat wound voice coil, dual shorting rings, extensive venting, and an FEA optimized motor, the UMII12-22 is specially engineered for high SPL, ultra-low bass extension, and minimal distortion. This means you can expect a mind-blowing audio experience without compromising on quality.

Thanks to its superior design incorporating a 3" diameter flat wound voice coil and meticulous venting, this driver can handle up to a staggering 800 watts of power continuously, without significant power compression or thermal fatigue. With dual 2-ohm voice coils, you have the freedom to operate in stereo 2-ohm mode or configure it in either 1-ohm or 4-ohm mono mode, giving you maximum flexibility in your setup.

Let's talk about enclosure flexibility - a standout feature of the UMII12-22. This subwoofer is engineered to perform excellently in sealed enclosures as small as 1 cubic foot, providing incredible accuracy and deep bass. But that's not all. In larger vented enclosures the UMII12-22 will deliver impressive sound pressure levels, diving down to a the very bottom octave.

In summary, whether you're looking for a compact setup or a substantial vented system, the UMII12-22 is designed to deliver. With its unbeatable features, exceptional power handling, and unparalleled performance, this subwoofer is a stepping stone on the path to audio excellence. Choose the UMII12-22 from Ultimax and elevate your audio experience to new heights.

Carbon Fiber Cone and High Roll Rubber Surround

With a remarkably high strength to weight ratio, Dayton Audio chose a single layer woven carbon fiber cone for the Ultimax II. This rigid diaphragm resists deformation from the stress of high displacement to ensure pistonic movement and extreme durability. Thanks to the low mass, this driver can reproduce every detail with accuracy and control. More than just a cosmetic touch, the cone is indexed for a smooth transition between the cone and surround adding extra rigidity on the edge to minimize unwanted resonances. Supporting the diaphragm is a high roll butyl rubber surround that has been optimized to allow extreme excursion without sacrificing cone area.

3" Flat Wound Voice Coil

In order to reliably handle up to 800 watts RMS, the UMII12-22 is driven by a 3" diameter, 4-layer, flat wound voice coil on a vented aluminum former. The flat ribbon wire has significantly more surface and contact area than round wire resulting in improved heat transfer and dissipation. The 4 layers put more windings in the magnetic gap while keeping the gap as tight as possible, improving motor strength and overall control. Additionally, the thick aluminum former plays a crucial role by efficiently drawing heat away from the voice coil, the first step to keeping the motor cool.

Optimized Motor with Extensive Venting

In order to ensure optimal performance and minimize distortion, the voice coil is driven by a FEA optimized magnet assembly. This assembly creates a powerful and symmetric magnetic field in the center of the voice coil allowing for identical forward and backward movement of the cone, even at maximum displacement. The top and back plates have been precisely machined with sculpted edges to effectively contain and transfer the magnetic force. To prevent overheating, the motor assembly and frame feature extensive venting, allowing heat to escape from the voice coil and former. This venting is achieved through various paths, including the voice coil former, sub-cone, under the spider, through the pole piece, and voice coil gap, ensuring efficient cooling and preventing power compression, even during long listening sessions.

Low Distortion Shorting Cap and Sleeve

To keep distortion at a minimum, the UMII12-22 incorporates an aluminum shorting sleeve and a thick aluminum pole piece cap. These elements play a crucial role in maintaining stability and consistency in the motor's magnetic field as the voice coil moves within the magnetic gap. In addition, they ensure that the inductance remains linear throughout the entire stroke of the voice coil. This consistent motor force is instrumental in minimizing non-linearities and intermodulation distortion. Moreover, the shorting rings contribute to a reduction in the overall inductance of the voice coil, thereby enhancing the output capability in the mid-bass and upper bass frequencies.

Dual Spiders with Stitched Tinsel Leads

Achieving truly linear movement in high excursion drivers is of utmost importance. Even the tiniest rocking motion can be greatly magnified as the cone travels further away from its resting position. In order to avoid this issue, the UMII12-22 driver incorporates a dual spider system. The spiders are intentionally spaced as far apart as possible to ensure that the cone and voice coil move reliably in a pistonic manner. Furthermore, in order to prevent fatigue and breakage the tinsel leads have been meticulously stitched onto the top spider. This not only enhances the overall durability but also eliminates any possibility of contact between the leads and the cone or spider.

Enclosure Recommendations

  • Sealed (car audio - sound quality/music): 1 cubic ft. (net internal, not including driver volume) produces an f3 of 46 Hz with a 0.83 Qtc alignment
  • Vented (car audio - high output/home theater): 2.5 cubic ft. (net internal, not including driver or port volume) tuned to 25 Hz produces an f3 of 26 Hz

Explore All of the Ultimax II Drivers

UMII18-22 18"

Nominal Diameter: 18"
Frequency Response: 20-500Hz

Shop 18"

UMII15-22 15"

Nominal Diameter: 15"
Frequency Response: 20-300Hz

    Shop 15"

    UMII10-22 10"

    Nominal Diameter: 10"
    Frequency Response: 25-500Hz

      Shop 10"

      UMII8-22 8"

      Nominal Diameter: 8"
      Frequency Response: 30-600Hz

        Shop 8"

        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

        Note: The Ultimax II UMII12-22 is a dual voice coil driver with a 2-ohm impedance per coil. All parameters are measured with the voice coil wires in series, resulting in a single 4-ohm load.

        Product Details

        BrandDayton Audio
        ModelUMII12-22
        Part Number295-712
        UPC848791010231
        Unit of MeasureEach
        Weight27.34

        Product Specifications

        Nominal Diameter12"
        Bolt Circle Diameter11.875
        Power Handling (RMS)800 Watts
        Power Handling (MAX)1600 Watts
        Impedance4Ω
        Frequency Response22 - 400Hz
        Sensitivity88.6dB 2.83V/1m
        Voice Coil Diameter3"

        Thiele-Small Parameters

        Resonant Frequency (Fs)31Hz
        DC Resistance (Re)4.2Ω
        Voice Coil Inductance (Le)0.66mH
        Mechanical Q (Qms)2.75
        Electromagnetic Q (Qes)0.71
        Total Q (Qts)0.56
        Compliance Equivalent Volume (Vas)1.87ft³
        Mechanical Compliance of Suspension (Cms)0.133mm/N
        BL Product (BL)14.8T·m
        Diaphragm Mass Inc. Airload (Mms)189g
        Maximum Linear Excursion (Xmax)22mm
        Surface Area of Cone (Sd)528cm²

        Materials of Construction

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

        Mounting Information

        Overall Outside Diameter12.7"
        Baffle Cutout Diameter11.25"
        Depth7.1"
        # Mounting Holes8

        Parts Express Staff Recommended Enclosure Volume

        Sealed Volume1ft³
        Sealed F346Hz
        Vented Volume2.5ft³
        Vented F326Hz

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