The PW8D4 is an 8-inch dual 4-ohm subwoofer built for installations where compact size cannot come at the expense of output. Rated at 400W RMS with an 800W peak, it delivers controlled low-end reproduction down to 32 Hz through a combination of high-flux ferrite motor design and active thermal management. This is a purpose-built driver for builds that demand reliable, sustained performance in a smaller enclosure footprint.

• 4-layer high-temperature copper voice coil sustains peak output over extended listening sessions without thermal rolloff.
• High-flux ferrite motor generates the magnetic force needed for accurate, authoritative bass reproduction across the full 32–600 Hz range.
• Polycarbonate spider suspension provides consistent linear excursion and improved responsiveness at all drive levels.
• Advanced airflow cooling system actively manages heat buildup, protecting the voice coil during high-demand use.
• IMPP cone material balances rigidity and low mass for accurate transient response.
• Dual 4-ohm voice coil allows flexible wiring configurations — 2-ohm parallel or 8-ohm series — to match a range of amplifier outputs.

Specifications

• Nominal Impedance: Dual 4Ω
• RMS Power Handling: 400 Watts
• MAX Power Handling: 800 Watts
• Frequency Response: 32–600 Hz
• Voice Coil Diameter: 2" (50.8mm)
• Voice Coil Material: ASV
• Cone Material: IMPP
• Frame: Steel
• Magnet: Ferrite
• Magnet Weight: 135 oz (50 oz)
• Xmax: 8.8mm

Thiele/Small Parameters

• Revc: 1.6 Ω
• Sensitivity: 82.6 dB
• Fs: 39.7 Hz
• Qts: 0.58
• Qes: 0.65
• Qms: 5.6
• Rms: 3.3 kg/s
• Vas: 12.4 L
• η0 (Efficiency): 0.11%
• CP: 3223.9 µF
• Res: 28.2 Ω
• Cms: 0.22 mm/N
• BL: 6.7 T·m
• Le: 0.66 mH
• Mms: 73.5 g
• Sd: 201.1 cm²

Dimensions

• Overall Depth: 4.96" (126mm)
• Mounting Depth: 4.13" (105mm)
• Overall Diameter: 8.47" (215mm)
• Cutout Diameter: 7.24" (184mm)