SoundQubed HDX3 15" Competition Subwoofer 1500W RMS D1 or D2
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If you want a 15" subwoofer that can bring real low-end authority while still staying efficient and controlled, the SoundQubed HDX3 15 is built for that kind of setup. This heavy-duty competition subwoofer is made for customers who want strong bass, serious output, and a subwoofer that can make the most of real amplifier power. With a made in the USA dual voice coil and a design focused on efficiency, control, and cooling, the HDX3 15 is a strong choice for hard-hitting daily systems and serious bass builds alike.
The HDX3 can handle 1500 watts RMS and 4500 watts peak power, giving you a strong balance of real power handling and serious output potential. SoundQubed built this series with a thick top plate, high motor force, and a tight gap for 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 achieve 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 earlier 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, performance, and long-term durability when the system is pushed hard. If you are shopping for a 15" competition subwoofer, SoundQubed 15" sub, HDX3 15, 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 15 is offered in D1 and D2 versions and uses a 3" voice coil, 300 oz magnet, 68 mm usable throw, 26 Hz Fs, and 87.41 dB sensitivity. That gives you the kind of hardware and efficiency needed for strong low-end response in a serious enclosure and amplifier setup.
Specifications
| Specification | Details |
|---|---|
| Brand | SoundQubed |
| Series | HDX3 |
| Speaker Size | 15" |
| Subwoofer Type | Competition dual voice coil subwoofer |
| RMS Power Handling | 1500 watts |
| Peak Power Handling | 4500 watts |
| Impedance Options | D1 or D2 |
| Magnet Weight | 300 oz |
| Voice Coil Diameter | 3" |
| Coil Length | 50 mm |
| Usable Throw | 68 mm |
| Fs | 26 Hz |
| Zmax | 63.8 ohms |
| Qms | 4.847 |
| Qes | 0.3665 |
| Qts | 0.3408 |
| Vas | 78.08 liters |
| Le | 2.711 |
| Mms | 472.8 grams |
| Cms | 0.082 |
| Sensitivity | 87.41 dB |
| n0 | 33.96% |
