SKU: 94128267068

Ascendo The28 Sub Pro Passive Squared Infrasonic Subwoofer

Sale price$20700.00 Regular price$23000.00
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Ships within 48 hours · Estimated delivery Jul 21 - Jul 26

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Description

Ascendo The28 Sub Pro Passive Squared Infrasonic SubwooferTHE 28 SUB PRO SQUARED: The Future of Bass Has Arrived Revolutionising Home Theatre Bass The 28 Sub Pro Squared is not just a subwooferits a breakthrough in low frequency performance. Inspired by a discussion with Trinnov CEO Arnaud Laborie at the ISE Show, this subwoofer was engineered to push the boundaries of bass reproduction. After extensive research and development, it features an ultra powerful 28 inch composite sandwich cone, constructed from

THE 28 SUB PRO SQUARED: The Future of Bass Has Arrived

Revolutionising Home Theatre Bass

The 28 Sub Pro Squared is not just a subwoofer—it’s a breakthrough in low-frequency performance. Inspired by a discussion with Trinnov CEO Arnaud Laborie at the ISE Show, this subwoofer was engineered to push the boundaries of bass reproduction. After extensive research and development, it features an ultra-powerful 28-inch composite sandwich cone, constructed from multiple layers of Rohacell. With a cone surface equivalent to a 32-inch round subwoofer, it sets a new benchmark for deep, powerful, and precise bass.

Unrivalled Performance in Any Space

Designed to deliver exceptional output with a minimal footprint, the 28 Sub Pro Squared is the ideal solution for high-performance home theatre setups. Whether used in a subwoofer cluster, Trinnov WaveForming, Dirac ART, double bass arrays, or single bass arrays, it integrates seamlessly while producing earth-shaking, infrasonic frequencies—bass that is felt as much as it is heard.

It also extends beyond the standard 120Hz LFE cutoff, making it the ultimate kick woofer for high-impact effects. Whether it’s the deep resonance of an explosion or the sharp crack of a gunshot, every sound is reproduced with incredible clarity, precision, and intensity.

Precision-Engineered for Maximum Impact

With a depth of just 30 cm, the 28 Sub Pro Squared fits into spaces where other subwoofers cannot, yet it delivers unrivalled performance. Its compact yet commanding dimensions—80 cm wide and 100 cm high—allow for close woofer spacing, ensuring perfect coupling in bass arrays with control up to 120Hz.

Cutting-Edge Engineering for an Immersive Experience

This subwoofer is engineered to deliver not just deep bass, but accurate and controlled bass. With an ultra-powerful motor structure, it generates a perfect planar wave front, offering high efficiency, extreme power handling, and low system Q. The result is bass that is tight, fast, and dynamic, ensuring every note and effect is delivered with stunning accuracy.

Experience Sound Like Never Before

The 28 Sub Pro Squared by Ascendo is more than just a subwoofer—it’s a gateway to an immersive audio experience. Whether for blockbuster movies, high-impact gaming, or music, it delivers bass that can be felt in the chest and throughout the room.

✅ Groundbreaking low-frequency performance
✅ Compact yet powerful design
✅ Seamless integration into advanced home theatre systems
✅ Precision engineering for tight, controlled bass

Stop just watching films—start experiencing them.

Specification

Speaker type

28" forward-firing, advanced carbon rohacell composite sandwich flat panel cone, neodymium motors with quad 4” ultra-high-temperature voice-coil

Xmax

22mm Xmax excursion each direction (44 mm linear), voice coil remaining in homogeneous magnetic field

Passive | Active

Passive

Recommended amplifiers 

1Ch Amplifier is required. Min. recommended amplifier: 141 Vrms, 200 Vpk, 17.7 A; equivalent to 2500W@8 Ohm, up to 450V Peak. Other configuration can be 2 x 4 Ohms with 2 x 250V Peak (2 x 178V RMS)

Recommended ASCENDO amplifiers  

(With DSP-4D: AIA2-10K2 IS), DSP4-10K2

Principle

Sealed

SPL (Peak / half space 2pi)

Measurement data
140 dB @80 Hz and up
123 dB @ 20Hz
100 dB @ 11Hz
Please refer to our measurement report for more details

Frequency range

Measurement data (without DSP)
38 Hz - 640 Hz / -10 dB

 Efficiency 

91.8 dB / 1W/m 4 pi, 97.8 dB / 1W/m 2

Power handling 

30kW Peak

Impedance 

4 Ω  

Air volume displacement 

11.7 L / 713 cu in comparison 18" standard cinema subwoofer 1,1 L

Directivity horizontal x vertical in Deg°

360°

Input terminal

4-conductor Phoenix 10 AWG (5,26 mm²)

Enclosure

Internally braced MDF

Width 

37,80 " | 800 mm

Height

39,37 " | 1000 mm

Height with feet 

39,96 " | 1015 mm

Depth without grill 

11,81 " | 300 mm

Weight

308,65 lbs | 140 kg

Finish 

Satin matte black

 

Technical modifications subject to change without further notice

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94128267068

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4.6 ★★★★★
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Nevermore Lane
Houston, US
★★★★★ 5
A Huge Hit in My Bully Breed House!
Color: Green, Pattern Name: Hammerhead Shark
I have a house full of bully breeds, and this hammerhead shark toy is by far one of their favorites. I’ve actually bought a few of them so there are extras around the house — otherwise they’d all be fighting over the same one! That alone tells you how much they love it. The shape makes it easy for them to grab, chew, and toss around, and the squeaker keeps them interested without being obnoxiously loud. What really impressed me is the durability. My dogs are serious chewers, and we’ve had these for a while now. They’re still going strong, which is saying a lot in this house. The combination of rubber and nylon seems to hold up really well to heavy chewing. The bacon scent definitely helps keep their attention, and I like that I can add a little peanut butter for extra enrichment. It keeps them busy and off my furniture — always a win. If you have strong chewers, especially bully breeds, this one is absolutely worth picking up. Durable, fun, and clearly dog-approved in this house.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
C
Verified Purchase
Cindi C
Draper, US
★★★★★ 4
Great for puppies
Color: Green, Pattern Name: Hammerhead Shark
Great for a teething puppy but very loud when it hits the floor. It is truly indestructible!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
A
Verified Purchase
Alan W.
Draper, US
★★★★★ 5
Great chew toy!
Color: Green, Pattern Name: Hammerhead Shark
Our dogs love them! I have three of the sharks to help them share with each other! LOL Been crewed on and still look good, long lasting and perfect size for our Golden and Yellow Lab.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
Jessenia Hernandez
Natrona Heights, US
★★★★★ 5
Finally a Toy My Aggressive Chewer Can’t Destroy
Color: Green, Pattern Name: Hammerhead Shark
My dog is an extremely aggressive chewer, and finding toys that last more than a few minutes has always been a challenge. Most toys are destroyed almost immediately, but this one has held up incredibly well. He chews on it constantly, and it still hasn’t been destroyed!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
M
Verified Purchase
Marshage
Los Angeles, US
★★★★★ 3
A Green Hard Plastic Sea Creature? Chew Toy
Color: Green, Pattern Name: Hammerhead Shark
This is a sturdy chew for my 40 lb retriever who is 9 months old. BUT after she has been chewing on it there are sharp edges which hurt my fingers when she wants me to throw it. It is strong and she enjoys it, so she can continue as long as she wants but, If it cuts her tongue or mouth it’s gone.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2026

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