SoundQubed HDX4.2 Series 12" Subwoofer 4" DVC 4,000 Watts RMS D1/D2
Key features
- Subwoofer size: 12.0 inches
- RMS power per subwoofer: 4000 W
- Voice-coil options: D1, D2
- Mounting depth (D2): 9.17 in / 233 mm
- Mounting cutout diameter (D2): 11.42 in / 290 mm
- Linear excursion (Xmax, D2): ±23 mm
SoundQubed HDX4.2 Series 12" Subwoofer 4" DVC 4,000 Watts RMS D1/D2 - Dual 2 Ohm is backordered and will ship as soon as it is back in stock.
SoundQubed HDX4.2 Series 12" Subwoofer 4" DVC 4,000 Watts RMS D1/D2 - Dual 2 Ohm is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
The SoundQubed HDX4.2-12 is a 12-inch DVC subwoofer rated for 4,000 watts RMS and built for high-output car audio systems. Choose the D1 or D2 version to match your amplifier’s supported final load.
Its 4-inch voice coil, 402 oz magnet, and 23 mm Xmax make it a fit for SPL or SQL-focused builds using a suitable enclosure and amplifier.
Key Features & Benefits
- 4,000 W RMS rating: Match amplifier output to the subwoofer’s RMS rating at the final wired impedance.
- 4-inch coil, 70 mm long: The extended coil length is specified for improved thermal management during high-power use.
- 402 oz magnet: The motor’s BL is 15.8 N/A for D1 and 21.7 N/A for D2.
- 23 mm Xmax: The listed linear excursion helps you assess the driver for a high-output bass build.
- D1 or D2 coil options: Select the impedance configuration that works with your amplifier and system wiring.
- Two enclosure options: The supplied volume ranges cover sealed and ported builds.
Technical Specifications
| Specification | HDX4.2-12D1 | HDX4.2-12D2 |
|---|---|---|
| Woofer Size | 12" | 12" |
| RMS Power | 4,000 W | 4,000 W |
| Peak Power | 8,000 W | 8,000 W |
| Magnet Weight | 402 oz | 402 oz |
| Coil Diameter | 4 in | 4 in |
| Coil Length | 70 mm | 70 mm |
| Fs | 34.4 Hz | 35.6 Hz |
| Impedance | 1+1 Ohm | 2+2 Ohm |
| QMS | 3.82 | 3.71 |
| QES | 0.47 | 0.50 |
| QTS | 0.42 | 0.44 |
| VAS | 30.8 L | 29.4 L |
| Le | 1.05 mH | 1.71 mH |
| η (No) | 0.20% | 0.18% |
| CMS | 0.07 mm/N | 0.07 mm/N |
| Sensitivity (1W/1M) | 84.9 dB | 85.1 dB |
| BL | 15.8 N/A | 21.7 N/A |
| Xmax (±) | 23 mm | 23 mm |
| Xmech (±) | 47 mm | 47 mm |
| SD | 530 cm² | 530 cm² |
Mounting Dimensions
| Model | A | B | C | D |
|---|---|---|---|---|
| HDX4.2-12D1 | 325 mm / 12.8" | 290 mm / 11.42" | 260 mm / 10.24" | 233 mm / 9.17" |
| HDX4.2-12D2 | 325 mm / 12.8" | 290 mm / 11.42" | 260 mm / 10.24" | 233 mm / 9.17" |
Enclosure Suggestions
| Enclosure Type | HDX4.2-12 D1/D2 |
|---|---|
| Sealed Enclosure | 1.0–1.75 ft³ |
| Ported Enclosure | 1.75–2.75 ft³ |
For ported enclosures, the stated tuning range is 32–38 Hz. The supplied guidance describes this option for SPL and low-frequency extension; sealed enclosures are suggested for tighter SQL bass.
Why Choose This Product?
The HDX4.2-12 combines a high RMS power rating with two dual-voice-coil impedance options. That gives you specific wiring choices when planning a high-power mono amplifier system.
Its listed Fs is 34.4 Hz for D1 and 35.6 Hz for D2. Compare those values and the enclosure recommendations with your build goals before choosing a version.
Installation & Compatibility Notes
- Single D1 subwoofer: Parallel wiring produces 0.5Ω; series wiring produces 2Ω.
- Single D2 subwoofer: Parallel wiring produces 1Ω; series wiring produces 4Ω.
- Amplifier and electrical system: Choose an amplifier with suitable RMS output at the final wired load, supported by adequate electrical supply and wiring. Set gain to avoid clipping.
- Minimum impedance: Use only a load supported by the amplifier. Do not use 0.5Ω unless the amplifier is explicitly rated for it. Multiple-subwoofer wiring changes the final load.
- Enclosure planning: Check the recommended volume and, for a ported box, the 32–38 Hz tuning range against your design.
- Mounting clearance: Compare the listed A–D dimensions with the available space in your installation.
Frequently Asked Questions
What amplifier power should I match with the HDX4.2-12?
It is rated at 4,000 W RMS. Choose an amplifier with suitable RMS output at your final wired impedance, and ensure the electrical supply and wiring support the system.
Which final loads can a single D1 or D2 version produce?
A single D1 produces 0.5Ω in parallel or 2Ω in series. A single D2 produces 1Ω in parallel or 4Ω in series. Confirm that your amplifier supports the selected load.
What enclosure volume is recommended?
The suggested sealed volume is 1.0–1.75 ft³. The suggested ported volume is 1.75–2.75 ft³, with a stated tuning range of 32–38 Hz.
How much space should I allow for mounting?
Both versions list dimensions A–D as 325 mm / 12.8", 290 mm / 11.42", 260 mm / 10.24", and 233 mm / 9.17". Compare these measurements with your available mounting space.
How do I choose between D1 and D2?
Choose the coil configuration based on your amplifier’s supported impedance and the final load you plan to wire. Account for the wiring of every subwoofer in the system.
Explore More
Shop SoundQubed products at 12 Volt Outlet, and explore our SoundQubed brand profile to learn more about the brand.
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Suggestions use 75–125% of the subwoofer’s RMS rating at the wiring load shown. Check wiring, enclosure needs, electrical capacity and installation space. Set gain and filters correctly to avoid overpowering the subwoofer. Buying more than one subwoofer changes the match.
