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. 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.
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.
18" forward-firing, advanced carbon rohacell composite sandwich cones, neodymium motor with 4” ultra-high-temperature Voice-coil
23mm Xmax excursion each direction (46 mm linear), voice coil remaining in homogeneous magnetic field
Passive | Active
1Ch Amplifier are required. Min. recommended amplifier: 89 Vrms, 126 Vpk, 22,5 A; equivalent to 2000W@4?, with correct RMS & Peak limiter settings. (up to 3kW)
Recommended ASCENDO amplifiers
(With additional external 1CH DSP: AIA2-6004), DSP4-10K2
SPL (Peak / half space 2 pi)
Measurement Data (without ext. DSP)
87 dB / 1W/m 4 pi, 93dB / 1W/m 2 pi
Air volume displacement
2,66 L / in comparison 18" standard cinema subwoofer 1,1 L
Directivity horizontal x vertical in Deg°
4-conductor Phoenix 12 AWG (3,3 mm²) screw clamp push on binding post
Internally braced MDF
21,14 " | 537 mm
26,65 " | 677 mm
Hight with feet
27,24 " | 692 mm
Depth without grill
10,43 " | 265 mm
Depth with plug
10,43 " | 265 mm
79,37 lbs | 36 kg
Satin matte black
Custom colour options
Piano lacquer, colour of choice, matt or other finishes upon request
Floor standing with feet
The18 SUB PRO PASSIVE SEALED SH is supplied with a front cover as standard
Technical modiﬁcations subject to change without further notice