RW8D4 - Echo Series 8 Inch Subwoofer - 400 Watts Power Dual 4 OHM Voice Coil, Competition Grade Pressed Paper Cone

The RW8D4 is an 8-inch dual 4-ohm subwoofer built for daily use where efficiency and longevity matter. Rated at 200W RMS with a high-temp 2-inch copper voice coil and ferrite magnet motor, it's designed to handle extended high-output sessions without thermal failure. A compact, versatile driver that works across sealed, ported, and bandpass enclosures.

• Dual 4-ohm voice coil — wired to 2 or 8 ohms for flexible amplifier matching
• 200W RMS / 400W peak — reliable daily power handling with thermal headroom
• High-temperature 2-inch black coated copper voice coil — maintains performance during sustained high-power use
• 34 oz. single slug ferrite magnet — delivers strong, consistent motor force for punchy, responsive output
• Pressed pulp cone with cotton fibers — balances low-frequency extension with transient response
• High roll foam surround — enables long excursion for deeper bass reproduction
• Advanced cooling structural design — improves heat dissipation to sustain peak output over time

Specifications

• Nominal Impedance: Dual 4Ω
• RMS Power Handling: 200 Watts
• MAX Power Handling: 400 Watts
• Frequency Response: 50–500 Hz
• Voice Coil Diameter: 2" (50.8mm)
• Voice Coil Material: ASV
• Cone Material: Fiber Paper
• Frame: Steel
• Magnet: Ferrite
• Magnet Weight: 96 oz (34 oz)
• Xmax: 8.5mm

Thiele/Small Parameters

• Fs: 37 Hz
• Qts: 0.52
• Qes: 0.58
• Qms: 4.78
• Vas: 16.6 L (0.59 ft³)
• Sensitivity (1W/1M): 83 dB

Dimensions

• Overall Depth: 4.47" (113.54mm)
• Mounting Depth: 4.00" (101.5mm)
• Overall Diameter: 8.47" (215mm)
• Cutout Diameter: 7.17" (182mm)