Ascendo The18 Sub Pro Passive Sealed Shallow Subwoofer

The18 SUB PRO PASSIVE SEALED SH subwoofer is so far above and beyond the competition in every aspect; refined musicality, tightness, and output levels suitable for a 18" driver.

OVERVIEW

Combine this exceptional performance with an enclosure only 10,43” deep to accommodate a wider range of applications where larger enclosures just can’t fit, and this model could possibly take the home theater market by storm.

FEATURES

The 18” driver is an advanced carbon rohacell composite sandwich cone. It is coupled with a neodymium motor with 4” Ultra-high-temperature voice coil. With a max SPL of 137dB @100Hz an , the dynamic expression and percussive impact that this sub can deliver puts it in a class by itself, let alone in such a shallow footprint as to almost disappear in home theaters or media rooms when compared to more traditional cube subwoofer designs.
In larger rooms where more output is needed (or just desired), ASCENDO also offers a Dual-18” version of this same enclosure design, with the two woofers stacked - The18-2 SUB PRO PASSIVE SEALED SH. The 143dB SPL @100Hz capability of this 48” high, 24” wide and only 11” deep defies belief until experienced.
Both models are engineered to operate perfectly in sync (in phase) with our Infrasonic subwoofers; The24, The32, The50 and The80 when there is a desire to reproduce movie content below 20Hz with the same authority, precision, and musicality. The combined results sound (and feel) like seamless and natural extensions of their individual efforts, adding to the overall addictive, immersive quality of a complete ASCENDO system.

SPECIFICATIONS

• Speaker Type: 18" forward-firing, advanced carbon rohacell composite sandwich cones, neodymium motor with 4” ultra-high-temperature voice coil
• Xmax: 23 mm excursion each direction (46 mm linear), voice coil remains in homogeneous magnetic field
• Passive / Active: Passive
• Recommended Amplifiers: 1 channel amplifier required. Minimum recommended: 89 Vrms, 126 Vpk, 22.5 A (equivalent to 2000W @ 4Ω), with correct RMS & peak limiter settings (up to 3 kW)
• Recommended ASCENDO Amplifiers: DSP-4D: AIA2-10K2 IS, AIA2-6004; DSP4-10K2
• Principle: Sealed
• SPL (Peak / Half Space 2π):
  • 130 dB @ 60 Hz and up
  • 117 dB @ 24 Hz
• Frequency Range (Measurement Data, without external DSP):
  • 38 Hz – 500 Hz / -3 dB
  • 23 Hz – 500 Hz / -15 dB
• Efficiency: 89 dB / 1W/m (4π), 93 dB / 1W/m (2π)
• Power Handling: 2500 W
• Impedance: 4 Ω
• Air Volume Displacement: 2.66 L (compared to 1.1 L for standard 18" cinema subwoofer)
• Directivity (H x V): 360°
• Input Terminal: 4-conductor Phoenix, 12 AWG (3.3 mm²)
• Enclosure: Internally braced MDF
• Width: 21.14" | 537 mm
• Height: 26.65" | 677 mm
• Height with Feet: 27.24" | 692 mm
• Depth without Grill: 10.43" | 265 mm
• Depth with Plug: 10.43" | 265 mm
• Weight: 79.37 lbs | 36 kg
• Finish: Satin matte black
• Custom Colour Options: Piano lacquer, color of choice, matte or other finishes upon request
• Shape Customization: Upon request
• Mounting: Floor standing with feet
• Included: Supplied with front cover as standard