SKU: 93577673102

Ascendo The28 Sub Pro Passive Squared Infrasonic Subwoofer

Sale price$20700.00 Regular price$23000.00
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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: 93577673102

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Dante
Belleville, US
★★★★★ 5
Great product, excellent service !!
Great product, excellent service !!
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Reviewed in the United States on August 10, 2025
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MildlyOverjoyed
Fort Morgan, US
★★★★★ 5
This stuff works!!
Scent: Fragrance-Free - Standard Size
This set has been the absolute best shampoo, lotion, and ointment for my little one going through a tough spell of baby acne. The ingredient list is clean, and worked miracles quickly. Baby’s skin was so soft, the redness disappeared within days. After just the second wash I could really notice a difference. Thank you Tubby Todd!
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Reviewed in the United States on April 30, 2026
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Betty Sumi
Alexandria, US
★★★★★ 5
Perfect gentle routine for newborn skin
Scent: Lavender Rosemary - Standard Size, Scent: Lavender Rosemary - Standard Size
We started using the Tubby Todd 3-Step Baby Bath & Skincare set when our baby was just weeks old, and it has been amazing for delicate newborn skin. The Hair + Body Wash is extremely gentle and doesn’t irritate or dry out the skin. It rinses clean and has a very mild, pleasant scent. The Everyday Lotion keeps our baby’s skin soft and smooth without feeling heavy or sticky. It’s perfect for daily use after bath time. The All-Over Ointment is great for extra-dry areas, especially around the cheeks and legs. It creates a protective barrier that helps prevent dryness, especially in cooler weather. We appreciate that this brand avoids harsh chemicals and focuses on clean, baby-safe ingredients. This routine has become part of our nightly bath time and has kept our newborn’s skin healthy and moisturized. Would absolutely recommend this to new parents looking for a safe, gentle skincare routine for their baby.
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Reviewed in the United States on January 20, 2026
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Karen Hernandez
Massapequa, US
★★★★★ 5
It didn’t work for my baby
Scent: Fragrance-Free - Standard Size
Update on my review: gave it 5 stars because the customer service is great!!! Thank you uso much! I’m sorry this product didn’t work out for my little one. But thank you for having a great customer service! I’ve been using the products for about a week now and haven’t noticed any improvement in my baby’s skin. I do appreciate that the ingredients are clean, fragrance-free, and that the ointment is thick and suitable for eczema. However, I’ve seen other reviews mentioning results within a few days, and unfortunately, that hasn’t been my experience. For me, it wasn’t worth the money. At first I thought my baby had ringworm but I took him to his pediatrician and she said it’s a mild eczema, I don’t want to do steroid lotion, I purchased this hoping it would help and it hasn’t
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Reviewed in the United States on April 19, 2026
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Miller
Boise, US
★★★★★ 5
Before and after baby newborn acne
Scent: Lavender Rosemary - Standard Size, Scent: Lavender Rosemary - Standard Size
As a first-time mom, I was really stressed when my newborn developed baby acne. The doctor told me it’s normal, but it was still hard to see. I tried other products like Nutella, but unfortunately, nothing seemed to help. Then I decided to try this product — both the face ointment and the body lotion — and I’m so glad I did. My baby actually loves it! Unlike other lotions, it doesn’t feel cold on her skin, so she no longer cries when I apply it. The biggest difference was how quickly it worked. Within just 2 days, her acne improved so much. I was honestly surprised and relieved. I definitely recommend this product to other parents. For reference, my baby is Asian, and it worked very well for her skin.
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Reviewed in the United States on May 2, 2026

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