Sundown Audio X-8 D4 Review

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Sundown always gets a spot or two in our "Best of" subwoofer reviews simply because their products are amazing. Any basshead will tell you so. In the smallest subwoofer size, our favorite is the X-8, for its consistent, amazing high excursion and LOUD bass.

Unlike other 8 inch subs, this one does really hit those very low notes, giving your audio system much deeper sound.


  • RMS: 750 Watts
  • Peak Power: 1500 Watts
  • Sensitivity: 82.71 dB
  • Frequency response: n/a
  • Impedance: Dual 2 or 4 ohms
  • Top Mount Depth: 7.00"
  • Cutout Diameter: 7.36"


Power and Sensitivity

With a sensitivity of 82.71 and a menacing 750W RMS, this is definitely a LOUD bass. It is designed towards SPL with a good Xmax of 16mm one-way by 70% BL. Sundown makes some other subs in this size however we've decided to include just their loudest.


It doesn't compromise sound quality as other cheaper 8" subs designed for SPL do. This one sounds deep and clear. It really is a worthy choice as a competition subwoofer.

Voice Coils and Cone

It features a solid Ppole piece with chamfered edges & machined air channels for increased voice coil cooling. The terminals are spring loaded

Along the coil it incorporates stitched-on double high-power tinsel lead wires for superior resistance of the black aluminium 2.5" voice coil. The heat dissipation on this subwoofer is outstanding.

detail of the tinsel leads

This subwoofer is available in Dual 2ohm coils or Dual 4ohms. The one displayed is the 4 ohms one. It will allow you to wire it either 2ohms, 8 ohms or 4 ohms using 2 amps.


The only downside we've found is that it bottoms out on the deepest frequencies (around 18hz) when pushed to the max.

All in all a great subwoofer for which we can hardly find any weaknesses.

Recommended Amplifier:

When we tried this subwoofer (back in March), our friend had it hooked up to a Hifonics BRX1516.1D Brutus at around 1000w RMS and we were quite surprised with how well the Sundown was handling that wattage. We cannot give further advise for this subwoofer in particular as we have only tested it with that amplifier.



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Sundown Audio X-8 D4 Review
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