Refurbished Sundown X-8″ v3 Subwoofer

$219.99 With Options

  • It will take on average 1 week for your order to be completed.

  • You will receive an email with tracking information as soon as your order ships.

Availability: 10 in stock

  • $0.00

Please understand that this is a refurbished subwoofer.

The sub may have scratches, blemishes and will not look 100% brand new.  
We rebuild a previously used working motor with a used frame, and install brand new parts inside (coil, triple joint ring, spider, cone, and dust cap). The subwoofer may or may not have a motor boot.

The subwoofer will function just as new and comes with a 30-day guarantee against build defects.

It will take on average 1 week for a refurbished subwoofer to be built and shipped.

Once your order is placed, you will receive a confirmation email. No other updates or emails will be sent until your order is completed at which point you will receive an email with tracking information.

Please email us if you have any questions.



The Sundown X-8, along with all other 8s in our line, is a unique driver within its line-up. Contrary to the design of the other X subwoofers the X-8 is more of an SPL-oriented subwoofer. The X-8 suspension design (spider & surround) was designed around creating larger peaks for SPL purposes. It is built on our patented 8” subwoofer frame (US Patent D691595) just like the SA-8 v.3 so it shares the same massive mechanical clearances (2.5” p-p allowable).

For the X-8 v.2 we removed the vented spacer ring as we did on the SA-8 v.3 and added the same high-velocity vent-holes around the frame base below the spider. This allowed us to reduce the mounting depth a bit to expand installation options. We also added a series of machined channels down the full height of the pole to increase air-based cooling and also to reduce audible air velocity through the motor.

The spider is a unique, progressive roll unit two layers thick. This spider was heavily FEA optimized to do the tricky job of allowing large excursion capacity with a 2.5” coil on an eight-inch subwoofer. The surround features a geometry very similar to the “SPL” cone options on our large woofers in a bit smaller size to suit the excursion capacity of this woofer. Both parts of the suspension support levels of excursion in excess of the linear limits of the motor & coil design.

While the X-8 is more of an SPL optimized woofer it does feature the highest linear x-max of any 8” in our line at a full 19mm one-way. It also features a very thick magnet ID shorting ring just like the SA-8 v.3 as well so will enjoy the same benefit of lowered inductive distortion. Make no mistake, the X-8 is still a very clean-sounding subwoofer.

If the sound of the SA-8 is too smooth for you – meaning you want a more aggressive & punchy sound – then the X-8 is the woofer for you. If you want the highest SPL output from any 8” woofer in our line – then the X-8 is, once again, the woofer for you.

Features & Technology:

  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 750-watts
  • Solid Pole piece with chamfered edges & machined air channels for increased voice coil cooling
  • High-velocity under-spider frame vents
  • Black Aluminum 2.5” voice coil former for superior heat dissipation
  • High-Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double High-Power Tinsel Lead Wires
  • High strength & patented cast aluminum frame
  • Optimized for small ported enclosure

Specifications X 8″D2 X 8″ D4
RE (ohms) 4.00 ohm 6.00 ohm
FS (Hz) 46.770 hz 48.506 hz
Vas (L) 4.190 3.933
Qes 0.544 0.533
Qms 4.432 5.542
Qts 0.485 0.486
Le (mH)
BL (NA) 18.508 23.218
Mms (Grams) 158.641 g 157.131 g
Cms (uM/N) 72.995 68.515
Sens (1w/1m) 80.8 db 81.1 db
X 8″
Sealed N/A
Ported .75-1.0 ft^3
Displacement 0.13 ft^3
Depth 7.00″
Outside Diameter 8.70″
Cut-Out 7.36″
Recommended Tuning 32hz
Recommended Port Area 12-16 in^2

10", 12", 15", 18"


Dual 2ohm (V2), Dual 4ohm (V2)


Brown (V2 Standard) (3lyr), Black (Zv.4 rev2 Standard) (4lyr) (+$10.00), SPL (Packed 3lyr Progressiv​e) (+$25.00)


Megaroll V2 (Standard), Megaroll V1 (Old Style), SPL


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