SoundQubed HDX 65 Subwoofer x4

Product Overview HDX 65 Subwoofer D2 or D4 x4 Model HDX 6.5 HDX 8 RMS Power 450 W 850 W Peak Power 1000 W 1700 W Magnet Weight 75 Oz 125 Oz Coil Diameter 2" 2.5" Coil Length 30 mm 36 mm Woofer Size 6.5" 8" F(s) 54.235 Hz 42.157 Hz Impedance D2 / D4 D2 / D4 Q(ms) 5.521 4.841 Q(es) 0.511 0.401 Q(ts) 0.546 0.391 V(as) 2.317 L 5.122 L M(ms) 85.480 grams 149.338 grams Sensitivity 1W/1m 81.5 82.1 BL 14.84 17.56 Xmax 8mm 12mm Sd 13.273" m2 20.106" m2 Displacement .06ft³ .09t³ Mounting Depth 4.527" 5.59" Circle Cutout 5.905" 7.244" Sealed Enclosure (Cu Ft): .25-.5FT³ .35-.75FT³ Ported Enclosure (Cu Ft): .35-1.0FT³ 1.0-1.5FT³ Reviews (No reviews yet) Write a Review

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Updated 4/15/2026

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Frequently Asked Questions

What is the SoundQubed HDX 65 Subwoofer x4?

The SoundQubed HDX 65 Subwoofer x4 is a car audio equipment made by SoundQubed. View full specifications and where to buy on this page.

Where can I buy the SoundQubed HDX 65 Subwoofer x4?

You can purchase the SoundQubed HDX 65 Subwoofer x4 from authorized dealers listed in the "Where to Buy" section on this page. We recommend buying from authorized retailers to ensure warranty coverage and genuine products.