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  #1  
Old 06-17-2015, 09:49 PM
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Default SI HT18s still $174 shipped

Stereo Integrity HT Sub

HT18 18″ Subwoofer





$174.00


Please specify dual 2 ohm or dual 4 ohm voice coils in order notes (after Paypal). Dual 4 Ohm temporarily unavailable. ETA for D4 option is first few weeks of July 2015.
This item ships via Fedex Ground using actual costs based on destination.
Due to the increased popularity of the HT 18″ subwoofer we have outsourced the order processing to Sundown Audio. This improves processing time and gets the woofer(s) to you faster. You will be taken to a normal cart for ordering the HT 18″ woofer but rest assured that it is supposed to be that way. Thanks.

SKU: HT18 Category: Subs
Order from Sundown Audio

Product Description

Stereo Integrity’s Home Theater subwoofers are designed to offer exceptional sound quality and low frequency extension. The HT series of woofers are handsomely equipped with all of the features that you’re looking for. To help keep the voice coil stay cool there is a custom tooled vented spacer ring sandwiched between the basket and the motor to allow cool air to be sucked in around the outside of the coil winding’s. Other elements (listed to the right) are class leading 22.5mm of Xmax and 43mm of Xmech ensuring plenty of both linear, and peak, travel for those deep bass requirements. You can’t get this much linear displacement for the dollar anywhere else.

Additional Information

Weight 42 lbs Dimensions 21 x 23 x 14 in
  • 18″ subwoofer
  • 22.5mm Xmax (one-way linear)
  • 43mm Xmech (one-way)
  • 8″ diameter Nomex spider
  • Sewn on leads
  • Large speaker terminals
  • Cast basket
  • 2.5″ diameter voice coil
  • Spiral cut CZA alloy former
  • 600 watts RMS power handling
  • High roll rubber surround
  • Inner magnet diameter shorting ring
  • Blank dust cap
  • Available in Dual 4 Ohm or Dual 2 Ohm

HT18 Specifications Drawing
Enclosure Information:
  • Sealed = 4 ft^3
  • Ported = 5-6 ft^3 tuned to 20 Hz
  • Cutout: 16.7″
  • Outer Diameter: 18.5″
  • Mounting depth: 9.5″
  • Mounting flange to top of surround: 1.5″
  • Displacement: 0.25 ft^3

HT18 Dual 4 ohm voice coils
HT18 Dual 2 ohm voice coils




Re ohms
Re 3.5 ohms Fs Hz
Fs 17 Hz Qes

Qes 0.41 Qms

Qms 5.8 Qts

Qts 0.38 Le mH
Le 3.2 mH Sd mm^2
Sd 117841 mm^2 Vas L
Vas 411.9 L Bl

Bl 19.7 Mms g
Mms 416 g Cms

Cms 208.8 Sensitivity (1w/1m) db
Sensitivity (1w/1m) 88.7 db Xmax mm
Xmax 22.5 mm
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  #2  
Old 06-17-2015, 10:23 PM
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Was looking at these earlier. Wish I didn't live in an apartment so I could run one in my ht
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Old 11-08-2015, 12:10 AM
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Going to bump this from the dead... Just ordered a pair for my HT before it's too late.

9/16/15 : The SI HT-18s are on CLOSE-OUT special for $159 shipped in the continental USA. This will be the last of these drivers to be made. The price runs until stock is all gone.
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  #4  
Old 11-15-2015, 01:25 PM
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all gone now
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