Soundqubed HDS2.3 Series 8" Subwoofer 2.5" DVC 700 Watts RMS D2/D4
Soundqubed HDS2.3 Series 8" Subwoofer 2.5" DVC 700 Watts RMS D2/D4 - Dual 2 Ohm is backordered and will ship as soon as it is back in stock.
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Soundqubed HDS2.3 Series 8" Subwoofer 2.5" DVC 700 Watts ...
Description
Description
SoundQubed HDS2.3-8 — 8" Subwoofer | 700W RMS | Dual 2 or Dual 4 Ohm
The SoundQubed HDS2.3-8 is an 8" subwoofer that refuses to play small. Rated at 700W RMS / 1,400W Peak, this driver delivers the kind of authoritative, ground-shaking bass you'd expect from a much larger woofer — all in a compact 8" platform built for tight enclosures and space-constrained builds. With a resonant frequency of 40.1 Hz (D2) / 41.6 Hz (D4) and sensitivity of 81.3 dB (D2) / 80.6 dB (D4), the HDS2.3-8 hits low, hits hard, and stays clean under sustained power.
The motor assembly features a 100 oz magnet paired with a 2.5" dual voice coil wound to 36mm — a serious coil length for an 8" driver that translates directly into superior thermal management and long-term reliability. The 13mm Xmax (23mm Xmech) gives this sub impressive linear excursion for its size, while the 196 cm² cone area (SD) moves real air. Available in Dual 2 Ohm and Dual 4 Ohm configurations, the HDS2.3-8 wires to 1Ω, 2Ω, or 4Ω to match virtually any mono amplifier on the market.
The HDS2.3-8 is at home in sealed enclosures from 0.35–0.75 ft³ for tight, accurate bass, or ported boxes from 0.75–1.25 ft³ for maximum output and low-frequency extension. Whether you're building a compact daily driver system, a motorcycle audio setup, or a space-efficient SQL build, the HDS2.3-8 delivers premium performance without demanding premium real estate. Pair it with a 300–700W RMS mono amplifier for best results.
Why Choose the SoundQubed HDS2.3-8?
- 700W RMS / 1,400W Peak Power Handling — Exceptional output for an 8" driver, built for daily SQL and moderate competition applications.
- 100 oz Magnet Structure — Oversized motor delivers strong BL force, tight transient response, and excellent control over cone movement.
- 2.5" Dual Voice Coil (36mm Wind) — Extended coil length maximizes heat dissipation, keeping the driver cool and reliable under sustained high-power use.
- 13mm Xmax / 23mm Xmech — Impressive linear excursion for an 8" sub, delivering deep, distortion-free bass at high output levels.
- D2 or D4 Impedance Options — Wire to 1Ω, 2Ω, or 4Ω to match your amplifier's optimal stable load.
- 81.3 / 80.6 dB Sensitivity — Efficient enough to perform well with a wide range of amplifier power levels.
- Compact Enclosure Compatibility — Sealed 0.35–0.75 ft³ or ported 0.75–1.25 ft³ for maximum install flexibility in tight spaces.
- SoundQubed HDS2.3 Series Build Quality — Competition-grade materials and engineering at a daily-driver price point.
Amplifier & Enclosure Recommendations
Amplifier Pairing: The HDS2.3-8 is rated at 700W RMS, so target a mono amplifier delivering 300–700W RMS at your chosen final impedance. The Dual 2 Ohm variant wires to 1Ω (parallel) or 4Ω (series). The Dual 4 Ohm variant wires to 2Ω (parallel) or 8Ω (series). For most daily builds, wiring the D2 to 2Ω or the D4 to 2Ω gives you the best balance of power and amplifier stability. A quality 500W RMS mono block at 2Ω is the sweet spot for this driver.
Enclosure: For sealed installs, target 0.35–0.75 ft³ net internal volume for tight, accurate bass with excellent transient response — ideal for rock, country, and acoustic genres. For ported builds, use 0.75–1.25 ft³ net with a port tuned to 33–42 Hz for added output and low-frequency extension — perfect for hip-hop, EDM, and bass-heavy content. The HDS2.3-8 is well-suited for compact custom enclosures, under-seat boxes, and space-efficient builds where an 8" is the largest driver that will fit.
Full Specifications — T/S Parameters
| Parameter | HDS2.3-8D2 | HDS2.3-8D4 |
|---|---|---|
| Woofer Size | 8" | 8" |
| RMS Power | 700W | 700W |
| Peak Power | 1,400W | 1,400W |
| Magnet Weight | 100 oz | 100 oz |
| Coil Diameter | 2.5 in | 2.5 in |
| Coil Length | 36 mm | 36 mm |
| Fs | 40.1 Hz | 41.6 Hz |
| Impedance | 2+2 Ohm | 4+4 Ohm |
| QMS | 6.13 | 5.48 |
| QES | 0.69 | 0.75 |
| QTS | 0.62 | 0.66 |
| VAS | 5.1 L | 5.1 L |
| Le | 2.20 mH | 2.42 mH |
| η₀ (No) | 0.05% | 0.05% |
| CMS | 0.10 mm/N | 0.10 mm/N |
| Sensitivity (1W/1m) | 81.3 dB | 80.6 dB |
| BL | 15.1 N/A | 19.2 N/A |
| Xmax (±) | 13 mm | 13 mm |
| Xmech (±) | 23 mm | 23 mm |
| SD | 196 cm² | 196 cm² |
Mounting Dimensions
| Model | A | B | C | D |
|---|---|---|---|---|
| HDS2.3-8D2 | 220 mm / 8.66" | 185 mm / 7.28" | 162 mm / 6.38" | 146 mm / 5.75" |
| HDS2.3-8D4 | 220 mm / 8.66" | 185 mm / 7.28" | 162 mm / 6.38" | 146 mm / 5.75" |
Enclosure Suggestions
| Enclosure Type | HDS2.3-8D2 | HDS2.3-8D4 |
|---|---|---|
| Sealed Enclosure | 0.35–0.75 ft³ | 0.35–0.75 ft³ |
| Ported Enclosure | 0.75–1.25 ft³ | 0.75–1.25 ft³ |
Frequently Asked Questions
Q: What amplifier should I pair with the HDS2.3-8?
A: Target a mono amplifier rated at 300–700W RMS at your final impedance. Wire the D2 to 1Ω or 4Ω, or the D4 to 2Ω or 8Ω. A 500W RMS mono block at 2Ω is the sweet spot for most daily builds.
Q: What's the difference between the D2 and D4 versions?
A: Both handle the same power and share identical physical specs. The D2 (Dual 2 Ohm) wires to 1Ω or 4Ω; the D4 (Dual 4 Ohm) wires to 2Ω or 8Ω. Choose based on your amplifier's stable impedance rating.
Q: What box size does the HDS2.3-8 need?
A: Sealed: 0.35–0.75 ft³ for tight, accurate bass. Ported: 0.75–1.25 ft³ tuned to 33–42 Hz for more output and extension. This driver works great in compact custom enclosures and space-efficient builds.
Q: Is this sub good for daily use or competition?
A: The HDS2.3-8 is primarily a daily SQL driver — optimized for sound quality and reliable output at 700W RMS. It will outperform most 8" drivers in its class for everyday listening and moderate SQL builds, and can handle light competition duty as well.
