---
product_id: 654255198
title: "Dayton Audio UMII18-22 Ultimax II 18\" DVC Subwoofer 2 Ohm Per Coil"
brand: "dayton audio"
price: "$1428.99"
currency: USD
in_stock: true
reviews_count: 8
category: "Dayton Audio"
url: https://www.desertcart.us/products/654255198-dayton-audio-umii18-22-ultimax-ii-18-dvc-subwoofer-2
store_origin: US
region: United States of America
---

# ±28mm linear excursion for deep bass 1200W RMS power handling Carbon fiber cone for precision & durability Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil

**Brand:** dayton audio
**Price:** $1428.99
**Availability:** ✅ In Stock

## Summary

> 🎵 Unleash seismic bass that commands attention and leaves no room for compromise!

## Quick Answers

- **What is this?** Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil by dayton audio
- **How much does it cost?** $1428.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/654255198-dayton-audio-umii18-22-ultimax-ii-18-dvc-subwoofer-2)

## Best For

- dayton audio enthusiasts

## Why This Product

- Trusted dayton audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Deep Bass Mastery:** ±28mm xmax ensures earth-shaking lows without distortion—feel every beat.
- • **Precision Engineering:** Rigid woven carbon fiber cone delivers lightning-fast, crystal-clear sound response.
- • **Powerhouse Performance:** Handles a staggering 1200 watts RMS to fuel your ultimate bass cravings.
- • **Versatile Installation:** Optimized for sealed or vented enclosures—customize your soundscape with confidence.
- • **Heat-Resistant Reliability:** Advanced venting and cooling keep your subwoofer running cool under pressure.

## Overview

The Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer features a robust 1200W RMS power capacity, a precision-engineered carbon fiber cone for fast and accurate sound, and an impressive ±28mm linear excursion for deep, distortion-free bass. Designed with advanced cooling vents and dual spiders, it ensures reliable performance even at extreme volumes. Perfectly suited for both sealed and vented enclosures, this subwoofer is a top-tier choice for audiophiles and car audio enthusiasts seeking powerful, clean, and immersive low-frequency sound.

## Description

Product description Dayton Audio UMII18-22 18" Ultimax II DVC Subwoofer Introducing the Dayton Audio UMII18-22 Ultimax II 18" carbon fiber cone subwoofer driver - a true powerhouse, engineered to deliver more of everything you loved about the original Ultimax drivers. This cutting-edge subwoofer is the product of advanced technology, meticulous design, and a relentless pursuit of low frequency bliss. Drawing upon the success of its predecessor, the UMII18-22 subwoofer packs an arsenal of enhancements to deliver mind-blowing bass that will leave you breathless. With improved excursion capability, lower distortion levels, higher power handling, greater efficiency, and increased output, this subwoofer is a force to be reckoned with. Whether you're a home theater enthusiast, a car audio aficionado, or a devout audiophile, the Ultimax II is the obvious choice to satisfy your craving for earth-shaking sound. Key Specs Nominal Diameter: 18" Power Handling (RMS): 1,200W Power Handling (MAX): 2,400W Impedance: 2Ω + 2Ω (Dual voice coils) Frequency Response: 20- 500Hz Sensitivity: 90.7 dB 2.83V/1m Voice Coil Diameter: 3" Maximum Linear Excursion: ±28 mm 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. 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 UMII18-22 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. Additional Features 3" Flat Wound Voice Coil In order to reliably handle up to 1,200 watts RMS, the UMII18-22 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. Low Distortion Shorting Cap and Sleeve To keep distortion at a minimum, the UMII18-22 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. 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. Specifications

Review: Amazing subwoofer will blow your mind. buy it. buy it. buy it! do not hesitate!!!!!! - OK so I am loving this subwoofer. I currently am living with someone that runs two parts express knockdown flat pack sealed 15 inch boxes which is the exact same door 15 inch set up that I am currently about to do. He is running UM – 15–22 gen ones supposedly the gen 2’s sound better can handle a little bit more power. And is overall a better sub I haven’t heard it, but I love the look of both models. I am in love with the sound coming from the first generation subwoofer along with the Behringer NX 6000 D that we are both running all around is an amazing sub it digs deep it sounds absolutely amazing. It’ll blow your mind on DIY builds it functions amazing you can throw a lot of power at it and they will not blow. They will blow your mind in my opinion. The best bang for the book there is to buy if you run the right DSP settings, which it is a pain in the ass, but you can get them to sound absolutely phenomenal and cranked them to outrageous levels without bottoming out or distortion. They are all around a durable sub and I very much like them. I am super super super impressed. I cannot wait to buy a second one and get them to installed in my boxes and running. I will update this with videos very soon.!!!!
Review: Excellent product - Excellent quality,unbelievable performance and sound

## 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 ±28 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 a staggering 1,200 watts RMS, you can expand the boundaries of audio excellence
- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DBRHBF1Y |
| Antenna Location | For Home Theater Systems, For Car Audio, For High-End Music Setups |
| Audio Driver Size | 18 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Best Sellers Rank | #47,684 in Electronics ( See Top 100 in Electronics ) #433 in Car Component Subwoofers |
| Brand | Dayton Audio |
| Built-In Media | Speaker |
| Color | Black |
| Compatible Devices | Television, Laptop |
| Compatible with Vehicle Type | Car, Truck |
| Connectivity Protocol | Aux, RCA, XLR, Coaxial, HDMI, USB |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Customer Package Type | Non-Flat Free Package |
| Customer Reviews | 4.9 out of 5 stars 40 Reviews |
| Enclosure Material | Carbon Fiber, Aluminum |
| Frequency Response | 22 |
| Global Trade Identification Number | 00848791010255 |
| Is Waterproof | FALSE |
| Item Dimensions D x W x H | 10"D x 10"W x 8"H |
| MP3 player | No |
| Manufacturer | Dayton Audio |
| Model Name | Dayton Audio UMII18-22 |
| Model Number | UMII18-22 |
| Mounting Type | Flush Mount |
| Number Of Circuits | 1 |
| Number of Audio Channels | 5.1, 7.1 |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Series Number | 2 |
| Speaker Maximum Output Power | 400 Watts |
| Speaker Size | 13 Inches |
| Speaker Type | Subwoofer |
| Specific Uses For Product | Home Theater, Car Audio, Audiophile, Gaming, Podcasting, DJing |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 18 Inches |
| UPC | 848791010255 |
| Unit Count | 1.0 Count |
| Warranty Description | 5 Year |
| Warranty Type | Full |
| Wireless Technology | No Wireless Communication Technology |
| Woofer Diameter | 18 Inches |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Dayton Audio
- **Connectivity Technology:** Wired
- **Frequency Response:** 22
- **Speaker Maximum Output Power:** 400 Watts

## Images

![Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil - Image 1](https://m.media-amazon.com/images/I/71SCpYUA5bL.jpg)
![Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil - Image 2](https://m.media-amazon.com/images/I/81Ov64LGryL.jpg)
![Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil - Image 3](https://m.media-amazon.com/images/I/912Co-xdLZL.jpg)
![Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil - Image 4](https://m.media-amazon.com/images/I/81QCblA3WuL.jpg)
![Dayton Audio UMII18-22 Ultimax II 18" DVC Subwoofer 2 Ohm Per Coil - Image 5](https://m.media-amazon.com/images/I/81JxExzG9pL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing subwoofer will blow your mind. buy it. buy it. buy it! do not hesitate!!!!!!
*by C***N on December 26, 2025*

OK so I am loving this subwoofer. I currently am living with someone that runs two parts express knockdown flat pack sealed 15 inch boxes which is the exact same door 15 inch set up that I am currently about to do. He is running UM – 15–22 gen ones supposedly the gen 2’s sound better can handle a little bit more power. And is overall a better sub I haven’t heard it, but I love the look of both models. I am in love with the sound coming from the first generation subwoofer along with the Behringer NX 6000 D that we are both running all around is an amazing sub it digs deep it sounds absolutely amazing. It’ll blow your mind on DIY builds it functions amazing you can throw a lot of power at it and they will not blow. They will blow your mind in my opinion. The best bang for the book there is to buy if you run the right DSP settings, which it is a pain in the ass, but you can get them to sound absolutely phenomenal and cranked them to outrageous levels without bottoming out or distortion. They are all around a durable sub and I very much like them. I am super super super impressed. I cannot wait to buy a second one and get them to installed in my boxes and running. I will update this with videos very soon.!!!!

### ⭐⭐⭐⭐⭐ Excellent product
*by G***N on May 4, 2026*

Excellent quality,unbelievable performance and sound

### ⭐⭐⭐⭐⭐ best for the money
*by A***S on March 29, 2026*

this is the absolute best subwoofer you can get for 120$ if your chasing deep chest felt lows and low end extension. not an spl built driver but it still does get pretty loud too. you won't find a better option from any popular brand for 120$. buy it. absolutely digs the lows in my 29hz tuned box.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-20*