Ascendo The24 Sub Pro-Passive Sealed Infrasonic Subwoofer

Its huge cone surface area and huge 90 mm of linear stroke - represents a world record for cinema subwoofers - allow it to move a gigantic volume of 10 liters of air per stroke to pressurize the room.

Due to its ultra-low resonance frequency and its sealed enclosure design the group delay is several times faster than the smaller 18", 15" or 12" subwoofers at the same frequency. Also the acoustic power output per cubic inch is by far in favour of this unique design compared to stacked multiple smaller subwoofers.

Its ingenious design allows the The24 SUB PRO to produce frequencies in the infrasonic frequency range with authority, reaching down lower than subwoofers with a smaller diaphragm surface ever will. At the same time this infrasub renders those notes with much more power, structure and resolution.

The The24 SUB PRO ideally suits not only all types and sizes of cinemas, but also high-end stereo systems. Much of the spacial room information of the recording envirnment in a great audiophile recording is contained in the sub 30Hz audio band. You will hear more details in mid and high frequencies.

• Speaker Type: 24" forward-firing woofer with dual 5" voice coil
• Xmax: 45 mm excursion each direction (90 mm linear), voice coil remains in homogeneous magnetic field for linear, low-distortion performance
• Passive / Active: Passive
• Recommended Amplifiers: 2 amplifier channels required. Minimum recommended: 2 × 109 Vrms, 154 Vpk, 27.3 A (equivalent to 3000W @ 4Ω per channel, 6000W total) with correct RMS & peak limiter settings (up to 450V = 20 kW peak)
• Recommended ASCENDO Amplifiers: DSP4-10K2
• Principle: Sealed
• SPL (Peak / Half Space 2π):
  • 140 dB @ 32 Hz and up
  • 120 dB @ 20 Hz
  • 104 dB @ 10 Hz
• Frequency Range (Measurement Data, without external DSP):
  • 28 Hz – 500 Hz / -3 dB
  • 20 Hz – 500 Hz / -15 dB
• Efficiency: 90 dB / 1W/m
• Power Handling: 2 × 2500 W
• Impedance: Dual voice coil, 4 Ω each
• Air Volume Displacement: 9.9 L (compared to 1.1 L for standard 18" cinema subwoofer)
• Directivity (H x V): 360°
• Input Terminal: Neutrik NL4 MP
• Enclosure: Internally braced birch ply and MDF
• Width: 29.53" | 750 mm
• Height: 43.31" | 1100 mm
• Height with Feet: 44.29" | 1125 mm
• Depth without Grill: 19.69" | 500 mm
• Depth with Plug: 19.69" | 500 mm
• Weight: 255.74 lbs | 116 kg
• Finish: Structural paint black
• Custom Colour Options: Piano lacquer, color of choice, matte or other finishes upon request
• Shape Customization: Upon request
• Mounting: Floor standing with feet