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 Aug 17 - Aug 22

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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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K
Verified Purchase
Ken M.
Louisville, US
★★★★★ 5
Item perfect
Size: 72PCS
Fat shipping, item as discribed
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Reviewed in the United States on May 26, 2026
L
Verified Purchase
Luis Fabiano
Charlottesville, US
★★★★★ 5
Amazing kit, it has everything you need!
I never really thought about keeping a tire repair kit in my car, until I had a flat in the middle of nowhere. That’s when I got this 54-piece Flat Tire Repair Kit with Air Compressor, and now I wouldn’t travel without it. The kit has everything you need to patch up a flat quickly and get back on the road, and it’s surprisingly easy to use, even for someone like me who’s never done it before. The air compressor works fast, inflating my tire in just a few minutes, and the tools feel solid and well-made. Value for the money: 10/10 Honestly, this little kit (amazing size) saved me from a stressful situation, and now I tell everyone: just keep one in your car, you never know when you’ll need it!
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Reviewed in the United States on March 6, 2025
J
Verified Purchase
Jimmy
San Leandro, US
★★★★★ 5
Great Kit for ATV's
Great so far, bought to keep in our Four Wheeler in case of flat on the trail. Pump is great for ATV Purposes not sure about cars and trucks etc. Ran all 4 tires up to 8 psi from 6 psi in just a few minutes,so it does work great for lower psi use. Tools are built well and plenty of plugs and other items are provided. All fits well in supplied case in the back storage of my 2025 Cforce 600 Touring just for reference. Overall great value for what is included for that time when you need it. Must have for ATV's!
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Reviewed in the United States on November 12, 2025
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Amazon Customer
Los Angeles, US
★★★★★ 5
Good tire kit
Just what I needed for the sxs
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Reviewed in the United States on May 31, 2026
A
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Amazon Customer
Carnegie, US
★★★★★ 4
Good little pump
Works better than expected.
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Reviewed in the United States on May 22, 2026

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