SoundQubed HDX3 12" Series Subwoofer 1500W RMS D1 or D2

SoundQubed HDX3 12" Series Subwoofer 1500W RMS D1 or D2

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If you want a 12" subwoofer that brings serious low-frequency output without giving up control, the SoundQubed HDX3 12 is built for that kind of setup. This heavy-duty competition subwoofer is made for customers who want strong bass, serious power handling, and a woofer that can take real amplifier power in a practical size. With a beefy made-in-the-USA dual voice coil and a design focused on efficiency, cooling, and control, the HDX3 12 is a strong fit for hard-hitting daily systems and serious bass builds.

The HDX3 can handle 1500 watts RMS and 4500 watts peak power, giving you the kind of output potential that makes a serious difference once you put real power behind it. The motor uses a thick top plate, high motor force, and a tight gap for a high-efficiency speaker design. The taller 4-spoke cast aluminum frame makes room for a larger diameter spider for lower tuning and greater accuracy, while the larger spider roll profile helps deliver low-frequency performance without giving up power handling or control.

This subwoofer also uses a taller and wider surround for more precise excursion, stronger pulp-blend cones that are lighter than previous fiberglass-laminate designs, and a thicker, more robust aluminum former with black anodizing. Double slit venting and a higher temperature resin are also part of the design, helping improve cooling, durability, and long-term performance when the system is pushed hard. If you are shopping for a 12" competition subwoofer, SoundQubed 12" sub, HDX3 12, or a dual voice coil SPL-style woofer that can play low and stay strong, this one checks the right boxes.

For system design, the HDX3 12 is offered in D1 and D2 versions and uses a 3" voice coil, 300 oz magnet, 50 mm coil length, and 68 mm usable throw. SoundQubed also lists Fs at 26.92 Hz, sensitivity at 84.03 dB, BL at 31.45, and the 12" model as part of the HDX3 line alongside 15" and 18" versions.

Specifications