THE 28 SUB PRO SQUARED

THE 28 SUB PRO SQUARED: Redefining Bass for the Ultimate Home Theater Experience

A Vision Born from Innovation

The inspiration for this revolutionary subwoofer came from a conversation at the ISE Show with Trinnov CEO Arnaud Laborie, where we explored new ways to enhance bass performance. The result? A subwoofer design like nothing the world has seen before. After extensive research and experimentation, we developed a 28” composite sandwich cone, built from multiple layers of rohacell. With the cone area equivalent to a 32” round subwoofer, this masterpiece is engineered to push the boundaries of what’s possible in low-frequency sound reproduction.

Unmatched Performance in Any Space

Whether you’re creating a subwoofer cluster for a shallow, wide, and high wall of bass or integrating it into Trinnov WaveForming, Dirac ART, double bass arrays, or single bass arrays, this subwoofer stands as the ideal solution. It delivers the highest output while occupying minimal space, making it perfect for even the most space-conscious home theater setups.

Imagine a subwoofer that can effortlessly reproduce single-digit infrasonic frequencies, delivering earth-shaking bass that you can feel in your bones. At the same time, it can soar well above the LFE cutoff frequency of 120Hz, serving as the ultimate kick woofer. Whether it’s the rumble of a distant explosion or the sharp crack of a gunshot, this subwoofer brings every sound to life with stunning clarity and power.

Designed for Perfect Integration

We designed this subwoofer to be versatile and easy to integrate into any home theater system. Its unique construction allows for woofers to be spaced very closely together, achieving perfect coupling for bass array systems with control up to 120Hz. And with an overall depth of just 30 cm / 11,81 inch, it’s a perfect fit even in challenging installations. Despite its compact design, the subwoofer boasts outside dimensions of 80 cm / 37,80 inch wide and 100 cm / 39,37 inch high, making it a powerhouse of sound in a surprisingly sleek package.

Feel Every Beat, Every Moment

The engineering behind this subwoofer is nothing short of extraordinary. We’ve harnessed an immense amount of power in the motor structure, giving it the muscle needed to accelerate the cone, motor mass, and coupled air mass with lightning speed. This results in a subwoofer that produces a perfect planar wave front, with high efficiency, ultra-high-power handling, and very low system Q. The shallow roll-off, combined with ultra-dynamic response, means that every sound—from the subtlest whisper to the most intense action scene—hits with native speed, attack, and impact that other woofers simply can’t match.

Why Settle for Ordinary? Experience the Extraordinary.

This isn’t just about sound—it’s about emotion. It’s about feeling every moment of your favorite movie, every note of your favorite song, in a way that’s so real, it’s almost tangible. This Ascendo subwoofer is a gateway to a deeper, more immersive audio experience. Don’t just watch your movies; live them. TECHNICAL DATA
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

Hight

39,37 ” | 1000 mm

Hight 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