Description

Sundown Audio X-8 v.4 D4
The X-8 v.4 is THE KING of standard cut-out size 8″ subwoofers and it sets the standard for others to follow.It builds on the legacy of the v1, v2, and v3 models but definitively out-performs all previous generations. The secret sauce is largely in the painstakingly FEA optimized spider and surround. It’s hard to overstate the impact of proper suspension design on a subwoofer but anyone who has used the X-8 v.4 can attest that we’ve nailed it here.Beyond the suspension – the X-8 v.4 is built on a newly revised version of our classic custom-tooled 8″ frame. It represents the absolute maximum performance possible on this frame platform. The motor and coil are capable of ~20mm of linear x-max one-way and around 2.4″ p-p before the coil leaves the gap (with a little beyond that before any physical bottom is reached).As with most of our subs it also features an aluminum magnet ID shorting ring for reduced inductive distortion as well as a few other secret Sundown tricks for distortion reduction!”
Specifications
| T/S SPECS | X V.4 8″ D2 | X V.4 8″ D4 |
|---|---|---|
| RE (Ohms) | 3.6 | 6.0 |
| FS (Hz) | 41.299 | 44.150 |
| VAS (L) | 4.126 | 3.562 |
| Qes | 0.436 | 0.497 |
| Qms | 1.941 | 2.300 |
| Qts | 0.356 | 0.409 |
| Le | ||
| BL (NA) | 21.576 | 27.141 |
| Mms (Grams) | 215.153 | 220.090 |
| Cms | 68.389 | 59.044 |
| Sens (dB @ 1w/1m) | 80.1 | 79.8 |
| Xmax | 19mm | 19mm |
Enclosure Specifications
| X v.4 8 | |
| Sealed Enclosure | 0.3-.04cuft |
| Ported Enclosure | 0.75-1.0 cu ft |
| Recommended Tuning | 32hz |
| Recommended Port Area | 12-16 sq in |
| Displacement | 0.13 cu ft |
| Depth | 7.56″ |
| Outside Diam. | 8.71″ |
| Cutout | 7.32″ |













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