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SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2

Name: SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2
Brand: SoundQubed
Price: 929.95 USD

Product Overview The SoundQubed HDX4.2-18D2 is a competition-grade 18” subwoofer built to deliver crushing bass, unmatched power handling, and long-term reliability. Rated at 4000W RMS and 16,000W burst power, this dual 2-ohm powerhouse is engineered for high-output systems that demand deep, clean, and punishing low-end. With a sensitivity of 90.4dB and a resonant frequency of 31.7Hz, it offers efficient, ground-shaking performance with impressive clarity. A massive 402 oz magnet, 4” high-temp voice coil, and 23mm Xmax allow for extreme excursion and heat dissipation. Designed for ported enclosures between 5 to 7 cubic feet, the HDX4.2-18D2 is the ultimate choice for competitors and bass enthusiasts looking to push the limits of what an 18” sub can do. Reviews (No reviews yet) Write a Review

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Thiele-Small Parameters

Measured at small signal levels per AES standards

Electromechanical

F_s(Resonant frequency)

31.7 Hz

R_e(DC resistance)

2 Ω

Excursion

X_max(Linear excursion)

23 mm

Sensitivity

SPL₀(1W/1m)

90.4 dB

Power Handling

P_e(RMS power)

4000 W

Parameters measured per AES2-1984 (r2003) standards. Small-signal parameters valid within linear operating region.

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Updated 6/22/2026

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Frequently Asked Questions

What is the SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2?

The SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2 is a car audio equipment made by SoundQubed. View full specifications and where to buy on this page.

How much does the SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2 cost?

The SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2 typically sells for around $930 depending on the retailer and variant. Check the "Where to Buy" section for current pricing from authorized dealers.

Where can I buy the SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2?

You can purchase the SoundQubed HDX4.2 Series Subwoofer 18 Inch 4" DVC 4000w/8000w D2 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.