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Description
Ascendo 15SPV 15" Passive Vented SubwooferASCENDO THE15 SUB Passive Vented Subwoofer Precision Bass with Compact Power The ASCENDO THE15 SUB Passive Vented Subwoofer delivers deep, impactful bass in a versatile 15 inch format. Engineered for audiophiles, home theatre enthusiasts, and professional setups, this high performance subwoofer combines power, precision, and efficiency, ensuring a tight and immersive low frequency response. To top it off it's only 250mm deep, making it perfect to be
ASCENDO THE15 SUB Passive Vented Subwoofer – Precision Bass with Compact Power
The ASCENDO THE15 SUB Passive Vented Subwoofer delivers deep, impactful bass in a versatile 15-inch format. Engineered for audiophiles, home theatre enthusiasts, and professional setups, this high-performance subwoofer combines power, precision, and efficiency, ensuring a tight and immersive low-frequency response. To top it off it's only 250mm deep, making it perfect to be positioned behind acoustically transparent screen walls.
Powerful and Detailed Low-End Performance
Equipped with a 15-inch forward-firing driver and a 3-inch voice coil, the THE15 SUB Passive Vented reproduces rich and powerful bass with minimal distortion. With a frequency response extending down to 27Hz, it delivers deep, cinematic sound that enhances movies, music, and gaming experiences.
Precision-Tuned for Clarity and Control
The internally braced MDF enclosure is designed to eliminate unwanted vibrations, ensuring clean and accurate bass reproduction. Its vented design enhances airflow for a more natural and powerful low-end response, ideal for both home cinema and high-fidelity audio setups.
High-Powered Performance in a Compact Design
The ASCENDO THE15 SUB Passive Vented offers 1000W of power handling with a 4-ohm impedance, making it a perfect match for high-performance amplifiers. It reaches an impressive 120dB SPL at 50Hz and 116dB SPL at 30Hz, ensuring powerful, distortion-free bass that remains tight and controlled at all volume levels.
Key Features of the ASCENDO THE15 SUB Passive Vented
- 15” High-Excursion Woofer – Deep and controlled bass with a 3” voice coil for optimal power handling.
- Vented, Passive Design – Maximises efficiency while providing a rich and natural low-frequency response.
- Internally Braced MDF Enclosure – Minimises resonance and delivers tight, accurate bass reproduction.
- Wide Frequency Response – 27Hz - 400Hz (-12dB) for detailed and immersive low-end sound.
- Optimised for High Power Handling – 1000W power rating for room-filling bass.
- Precision Efficiency – 89 dB / 1W/m (4π) and 95 dB / 1W/m (2π) for enhanced performance.
- Professional-Grade Input Terminal – 4-conductor Phoenix 12 AWG connectors for secure and efficient signal transmission.
Seamless Integration into Your Audio System
The minimum recommended amplifier should provide 52.9 Vrms, 74.8 Vpk, and 13.2A, equivalent to 700W@4Ω with the correct RMS and peak limiter settings for optimal performance.
Compact Yet Powerful Design
Measuring 600mm (W) x 782mm (H) x 250mm (D) (without grille), the THE15 SUB Passive Vented delivers exceptional bass performance in a compact, floor-standing design. Its sleek black structural paint finish ensures it blends seamlessly into any home theatre or professional audio environment.
Upgrade Your Bass Experience with the ASCENDO THE15 SUB Passive Vented
The ASCENDO THE15 SUB Passive Vented Subwoofer is the perfect balance of power and precision, making it an ideal choice for high-performance home theatres, audiophile systems, and professional audio setups. With its tight, deep bass response and premium build quality, this subwoofer ensures an immersive and dynamic listening experience.
Specifications
| Speaker Type | 15" forward-firing subwoofer with 3” voice coil |
| Design Principle | Passive, Vented |
| Enclosure Material | Internally braced MDF |
| Finish | Structural black paint |
| Mounting | Floor-standing with feet |
| Impedance | 4 Ω |
| Power Handling | 1000W |
| Efficiency | 89 dB / 1W/m (4π), 95 dB / 1W/m (2π) |
| Frequency Range | 59 Hz - 400 Hz (-3 dB) / 27 Hz - 400 Hz (-12 dB) |
| Peak SPL | 120 dB @ 50 Hz, 116 dB @ 30 Hz |
| Excursion (Xmax) | 6 mm each direction (12 mm total) |
| Input Terminal | 4-conductor Phoenix 12 AWG (3.3 mm²) |
| Recommended Amplifiers | AIA2-1404 Bridged, AIA2-2704, AIA4-6004, AIA8-6004 Bridged |
| Minimum Recommended Amplifier | 52.9 Vrms, 74.8 Vpk, 13.2A (equivalent to 700W@4Ω with correct RMS & peak limiter settings) |
| Directivity (Horizontal x Vertical) | 360° |
| Dimensions (W x H x D) (without grille) | 600 x 782 x 250 mm (23 5/8" x 30 3/4" x 9 13/16") |
| Height Without Feet | 770 mm (30 5/16") |
| Packing Dimensions (W x H x D) | 740 x 910 x 380 mm (29 1/8" x 35 13/16" x 14 15/16") |
| Gross Weight | 37.7 kg (83.11 lbs) |
| Net Weight | 32.7 kg (72.09 lbs) |
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4.0 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Great Reading, Mind Opening
Format: Kindle
This is a terrifically interesting and entertaining book, which presented me with at least two blockbuster ideas that changed the way I think about the past. I'll get to those in a minute, but first a few general points. Charles Mann is a science journalist:who seems to specialize in BIG topics. His 2005 book ("1491", which argues that the pre-Columbian population of the Americas was much larger and more sophisticated than generally assumed), was very well received. I enjoyed it so much, and thought it so valuable a book, that I was very anxious to read "1493".
"1493" lived up to my (high) expectations. Mann is remarkable writer, with an extraordinary ability to present very complex facts and ideas in way that's not just accessible to the lay reader, it's fun for the lay reader. This isn't to say that the book isn't carefully researched -- the text is followed by almost 100 pages of footnotes, and throughout he cites and acknowledges the scientists and others from whom he has drawn information. It's just that Mann manages to combine a myriad of facts and hypotheses into a compelling narrative. And he often puts this in very concrete terms, focussing on individual people, commodities or events. It adds up to a fascinating read.
It is also a very important one, with implications for the future as well as about the past. Mann's subject in this book is the Columbian Exchange, the sudden movement of plants, microbes, animals and people between the eastern and western hemispheres after Columbus' voyage to the Americas in 1492. A well known effect of this was the eastern hemisphere adoption of western hemisphere foods (tomatoes, potatoes, chocolate, coffee, and on and on). Another effect that's only been recently come to be widely understood is the devastating impact on the pre-Columbian population of the Americas; as many as 80% died in the epidemics that followed the introduction of diseases to which they had no immunity. But the population die-off and the exchange of plant species are not the only effects of the Columbian Exchange. Mann's book explores the myriad ways in which the Exchange -- globablization -- has shaped the world of today.
Two things I learned from the book struck me particularly. First, like most Americans of my generation (older) I learned in school that the colonization of the Americas was carried out by white people, who moved into a largely uninhabited continent. "1491" took care of the uninhabited: "1493" takes care of the white. Mann says that from 1500 to 1840, about 3.4 million white Europeans emigrated to the Americas. Over the same period, about 11.7 million captive Africans were sent to the Americas. Except for New England, much of the United States and most of Latin American was far more black than white. (And probably in 1840 still more Indian/Native American than anything else). The racial balance changed as white immigration ramped up and as millions upon millions of blacks died too young, but the picture of early America looks very different to me now.
Secondly, Mann discussed at length the 19th century ecological disaster that engulfed China. I had always assumed that the floods that killed so many millions in China had always happened, and were the result of geography. There have indeed always been floods, but their severity and human cost grew logarithmically in the 19th century. New crops led to more food and to rising population growth, and at the same time to more potential cash crops, increasing the pressure on existing land holdings, and leading to vast land clearances. That made the floods far worse when they came, undermining the political structure and compounding China's problems. This was interesting not just a light on the past, but as a warning signal for the future.
The review is already too long, so, to sum it up: Great book!! Read it!! Give it to friends and family!!
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Reviewed in the United States on December 6, 2013
★★★★★ 5
LOVED This Read! Blew Me Away
Format: Hardcover
What a fantastic read! Woah. All of the Americas have an extraordinary history. I was mesmerized from beginning to end. If you like knowing your history, you will love this book. Well researched and smartly written. Couldn't put it down. Books like this are why people love to read. If you think you know the Americas, you might be surprised to find that there's more, and be prepared for a bit of a shake up. This book was a real eye opener.
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Reviewed in the United States on November 18, 2025
★★★★★ 4
A Brave New World
Format: Hardcover
It wasn't quite what I expected, but Charles Mann leads the reader on a fascinating journey in the wake of Columbus, focusing mostly on the environmental impact of his "discovery" of the New World. Mann literally spans the globe, as the establishment of Spanish colonies in the Americas would have far reaching consequences.
Most interesting to me was how silver came to be the currency of exchange, allow Spain to trade with China, when it established its trading outpost in the modern-day Philippines. Along with silver, came corn, rubber and potatoes which would radically alter the landscape of the world. Mann discusses how corn came to replace rice for many Chinese, and how rubber trees would be transplanted to Indochina, bringing with them unsuspected pests that would wreak havoc on ecosystems. In this sense, the book has similarities with Jared Diamond's
but explores different terrain. One of the most interesting chapters was on the highly profitable mining of bird guano and how the British cornered the market in this new fertilizer. Mann describes how the shift to mono-cultures had a tremendous impact on agriculture. At first, these new crops seemed to solve much of the world's food shortages, but then as the Irish famine made all too painfully aware, putting all your "eggs in one basket" can lead to devastating consequences as an unforeseen blight wiped out much of Ireland's food supply.
Mann also offers a long study on how slavery evolved and re-shaped the ethnic identity of many countries, particularly those in Central and South America. The miscegenation that took place, with particular focus on Brazil, reshaped cultural patterns and changed the political dynamics in these countries. He offers a number of intriguing case studies, and discussed the long term impact of this human cross-pollination. 1493 is a fascinating study and meditation on life after Columbus. We don't fully realize how rapidly the world changed after this fateful "discovery," and how continents became so interdependent, where before they had been relatively isolated from each other.
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Reviewed in the United States on April 30, 2012
★★★★★ 5
Great History book
Format: Paperback
This book was a gift for husband. He loves it. He is a slow reader, but he can’t put book down. New and interesting history facts and stories.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Consequence After Consequence
Format: Hardcover
"In Fourteen Hundred Ninety Two, Columbus Sailed The Deep Blue Sea" is a ditty sung by generations of school children. Most of those students learned and believed that Columbus was the only man in Europe who believed the world was round and proved it by sailing three ships west to find the East. In 1493, Charles C. Mann dismisses these legends and goes on to demonstrate that Columbus (or as he refers to him, Colon) and the other Europeans who sailed across the Atlantic in the 1400s and 1500s did far more than just discover a New World, they helped create a planet wide system in which people, plants, animals, and diseases travelled further and were linked in more ways than had ever before been possible. In other words, 1493 was the beginning point of a new age of globalization.
This is not a new theory. Alfred W. Crosby developed the term Columbian Exchange back in the 1970s to describe the changes that took place after 1492. Jared Diamond's Guns, Germs, and Steel and Collapse also detailed some of the consequences of the European "discovery" of the Americas. What makes Mann's new book so appealing is his ability to tell an engrossing story that ably explains how one consequence led to another, fundamentally changing society after society and helping to creat our modern world. This is global history at its best, jumping from Ming and Qing China's opulent but troubled societies to the fast growing but still relatively backwards European states to the myriad African and Native American cultures, all of them to be affected by the transfer of peoples, plants, diseases, and ideas. Mann has a keen eye for an appealing and informative anecdote which really details the consequences of seemingly small decisions, such as how the introduction of the sweet potato to China led to deforestation, or how the Little Ice Age was affected by the abandonment of the Native American practice of burning off underbrush in North American forests.
Its books like 1493, as well as Mann's earlier and equally excellent 1491, which make studying history so fascinating. I taught Advanced Placement World History to high school students for many years before retiring, and I regularly amused them (at least I hope I did) with many references to Jared Diamond and Alfred Crosby's ideas. With 1493 Charles C. Mann deserves equal recognition by global historians.
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Reviewed in the United States on August 19, 2011