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Description
Sundown Audio - U-Series v.2 10"2000 Watts RMS 4000 Watts Peak Dual 2 or 4 ohm voice coils Optimized for small ported enclosures Aluminum 3 voice coil former for superior heat dissipation High temperature copper voice coil Double stitched surround Heavy duty cast basket Spring loaded terminals accept up to 8 gauge wire Stitched on heavy duty tinsel leads Solid pole with vent channels and aluminum shorting ring cap Rear gap venting Top Plate Cooling Channels Designed to be at home in
- 2000 Watts RMS / 4000 Watts Peak
- Dual 2 or 4 ohm voice coils
- Optimized for small ported enclosures
- Aluminum 3” voice coil former for superior heat dissipation
- High-temperature copper voice coil
- Double stitched surround
- Heavy-duty cast basket
- Spring-loaded terminals accept up to 8-gauge wire
- Stitched-on heavy-duty tinsel leads
- Solid pole with vent channels and aluminum shorting ring cap
- Rear gap-venting
- Top-Plate Cooling Channels
Designed to be at home in the competition lanes or playing your favorite music, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9.4-inch wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. A custom, substantially thicker aluminum frame was designed specifically for the U Series, equipped with heat dissipation ribs. The U v.2 motor also features an extended pole piece to keep the coil under perfect control under high stress. The coil temperature is kept in check via a high-velocity solid pole / machined pole channels arrangement and a series of 16 direct air-gap vents in the back plate.
Specifications
| RE (Ohms) | 3.918 | 6.1962 |
| FS (Hz) | 49.9826 | 48.2463 |
| VAS (L) | 5.6312 | 6.1900 |
| Qes | 0.5327 | 0.6317 |
| Qms | 4.4138 | 4.5611 |
| Qts | 0.4753 | 0.5548 |
| Le (mH) | 3.1056 | 4.1634 |
| BL (NA) | 26.5116 | 29.7199 |
| Mms (Grams) | 304.2236 | 297.0392 |
| Cms (uM/N) | 33.3280 | 36.6351 |
| Sens (dB @ 1w/1m) | 82.9533 |
82.1635 |
| Xmax | 30mm |
30mm |
| T/S SPECS | UV.2 10" D2 | UV.2 10" D4 |
|---|
Enclosure Specifications
| Sealed Enclosure | 0.5 cu ft |
| Ported Enclosure | 1.0 cu ft |
| Recommended Tuning | 35Hz |
| Recommended Port Area | 16 sq in |
| Displacement | 0.21 cu ft |
| Depth | 8.15″ |
| Outside Diameter | 11″ |
| Cut-Out | 9.75″ |
| Physical Dimensions | Download |
Dimensions
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4.8 ★★★★★
Based on 1320 reviews
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Product Reviews
★★★★★ 5
More Tapas Please!
Format: Flexibound, Format: Flexibound
If you are bringing kids along to a new city like Barcelona, the Lonely Planet Kids book provides a great introduction for the children. It has very little of the adult stuff about hotels and restaurants and nothing on how much they cost. It is all about sites and experiences.
This lonely Planet book is divided into sixteen trails. There are marked starting points for each one on a map of the city, but no directions about getting from one attraction to the next along the trail. That must be the job of the adults. The groupings include history, castles, shopping, sports, parks, outdoor recreations, and food. I think that there should be more on food.
There are over eighty pages in the book. Each page is rendered in bright color drawings and photographs. The images and the explanations each take up about the same amount of room, although I think that the images have the advantage. This is a great book for the kids and for adults who want to get the essence of the city without getting bogged down in details.
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Reviewed in the United States on April 1, 2019
★★★★★ 5
Really fun and great for homeschooling or travel prep
Format: Flexibound
If you plan on traveling to Barcelona and want to get the kids excited and pumped for the visit, this would be a perfect book to read. There are so many different interesting aspects covered, from Barcelona's fashion week, to interesting wildlife found at the local parks, to statues and local history, that it really makes things rich and interesting.
What I love best is the design and layout. There are photographs mixed with drawings mixed with text in different sidebars and bubbles. It's just really fun to read and fun to browse. The one thing that I don't like is that some books like this have a type of stinky ink that gives me an immediate headache. Unfortunately, this book has that stinky ink., and even letting it air out with some of the pages splayed open, has not dissipated the smell.
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Reviewed in the United States on September 26, 2019
★★★★★ 5
Inviting layout for kids and very informative!
Format: Flexibound
My 9 year old son loves this book! He is a huge fan of the Lonely Planet books. We have their books on Countries and Cities which he loves and is always pulling off the shelf to read but he loves these new City Trails books even more. If you are familiar with their other kid books this series is very similar. The information is presented in bite size chunks that are about a paragraph long. His favorite part was the the thematic trails which provide the information on a few pages under a different theme throughout the city. He loves the the real pictures of the city and the fun graphics, like cartoon people and information put in a phone. My son loves trivia and fun facts so this book is perfect for him. He loved telling me lots of things I had never heard of before. This was an informational book for him that gave him a lot of great information about the country and culture and would be an excellent choice to prepare for a trip. I remain very impressed with how engaging Lonely Planet makes information inviting to kids. I will definitely be buying him more books in this series.
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Reviewed in the United States on May 2, 2019
★★★★★ 4
Easy and exciting
Format: Paperback
3.5⭐️
I didn't know that this book was the third part of the Campus Police series. But it reads well as a stand-alone book. The first two books are about the other two couples who also appear here.
This time, the story revolves around Cappy, who is back after a few weeks away and her grandfather's funeral, and Jazz, a librarian with a special flair for decorating her office. In this short time, a lot has changed in Cappy's personal life, and she has to get used to it all again.
Brian, a talented football player who was forced to completely change his life after a traffic accident, is found dead. Initially, it is classified as suicide, but Jazz insists on a more thorough investigation of the case, as she is convinced that Brian was looking forward to the future despite adverse circumstances. Cappy is assigned to determine whether it was a crime. The interviews Cappy conducted to uncover all the circumstances and background information were interesting. However, I found it a little strange that a civilian was allowed to attend these interviews.
Jazz and Cappy have mutual friends who are all professionally involved with the campus. The banter between them is amusing, and the romance between Cappy and Jazz is nice and sweet.
An easy-to-read book with amusing and likable characters, good and witty dialogue, and some suspense.
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Reviewed in the United States on July 20, 2025
★★★★★ 4
Very enjoyable read.
Format: Kindle
I believe this is the third installment of the ‘ University Police Series’ and the best part of a series like this is the reader gets to meet up with the cast of characters from Ms Walsh’s first two books.
The first book introduced us to a group of professors, four to be exact and in each book we get to read about romance and crime.. The University Campus Police are the ones these professor’s turn to when there is unfortunately a murder on campus.
This time it’s Professor Jazz Harald that seeks the help of the police when one of the students she knows has decided to end his own life. Jazz doesn’t believe the police reports so she reaches out to the campus police, Officer Cappy Flannery. Cappy has read the report herself, even visited the apartment where the young student lived. She agrees with the report but she also reluctantly agrees with Jazz the case should be investigated.
If you have read the first two books then you’re in for a treat, if you hadn’t read the first two books you might find yourself lost because Walsh brings in everyone or so it seems from the two stories. It might be a good idea to read the first two. Very enjoyable read.
ARC via NetGalley/ Bold Stroke Books
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Reviewed in the United States on June 10, 2025