HST-18 mkII 18″ Subwoofer


Flat $5 shipping in the lower 48 contiguous United States.

Please specify Dual 1 Ohm or Dual 2 Ohm coil configuration in the notes section when you order.

To use a credit/debit card to place your order please call us during normal business hours at 731-439-9629.

These subwoofers are hand-built in North Carolina.

Build time can be up to fourteen business days once your order is placed.


Product Description

Our HST-18 mkII is a dedicated Home Theater weapon of mass jubilation. Playing extremely deep and loud with the atypical ability to sound exceptionally good all in a very small enclosure is what the HST18 mkII is all about. The HST-18 mkII uses the same motor found on our HS-24 mkII utilizing a four layer flat wire aluminum voice coil and a large ferrite motor with two shorting rings with an additional item to eliminate eddy currents that lower, and linearize, inductance for improved transient response for “faster” bass feel. With 38 mm Xmax and over 4″ of peak cone travel the HST-18 mkII is capable of delivering more bass than you need. The HST-18 mkII can be used in sealed or ported enclosure alignments.

  • Wide and tall foam surround
  • 3″ bi-filar aluminum voice coil
  • 2000 watts RMS power handling
  • Magnet ID shorting ring
  • Chrome motor finish
  • Cast aluminum basket
  • 10″ nomex spider with dual flat sewn-on lead wires
  • Large 4 AWG speaker terminals
  • 38 mm one-way linear Xmax
  • Over 100 mm of cone travel possible
  • Cutout: 423.9 mm (16.69 inches)
  • Outer Diameter: 467.86 mm (18.42 inches)
  • Mounting depth: 302.26 mm (11.9 inches)
  • Mounting flange to top of surround: 63.5 mm (2.5 inches)
  • Sealed enclosure size of 4 ft^3
  • Ported enclosure size of 6 ft^3 tuned to 22 Hz. Use a port, or ports, with at least 50^2 of port surface area per driver.
HST18 mkII Dual 2 ohm voice coils
Re 3.8 ohms
Fs 15.6 Hz
Qes 0.35
Qms 5.0
Qts 0.33
Le 4.2 mH
Sd 117839 mm^2 (182.65 in^2)
Vas 307 L
BL 27.3
Mms 712 g
Cms 146
Sensitivity (2.83V/1m) 90.4 db
Xmax (1-way) 38 mm