SW-EV78D2 Sundown Audio E-Series v.7 8" Subwoofer – Dual 2 Ohm, 400W RMS

Sundown Audio E-Series v.7 8" Subwoofer – SW-EV78D2

Get serious bass from a compact subwoofer with the Sundown Audio SW-EV78D2 E-Series v.7 8-inch subwoofer. Designed for high-output car audio systems, this updated E-Series subwoofer combines 400 watts RMS of power handling with a heavy-duty motor structure and substantial cone excursion for impactful low-frequency performance.

The dual 2-ohm voice coils provide flexible wiring options, allowing the subwoofer to be configured for a final 1-ohm or 4-ohm load when wired correctly. Its 14mm one-way linear Xmax and cooling-focused motor design help it deliver impressive bass performance from an 8-inch driver.

Sundown Audio optimizes this subwoofer for ported enclosures, making it a strong choice for compact custom builds where bass output and enclosure design matter.

Key Features

• Model: SW-EV78D2

• Series: Sundown Audio E-Series v.7

• Size: 8 inches

• Power Handling: 400W RMS / 800W peak

• Voice Coils: Dual 2-ohm

• Linear Excursion: 14mm one-way Xmax

• Motor Design: Double-stacked magnet with vented magnetic gap and pole piece

• Voice Coil: 2-inch, high-temperature, 4-layer copper winding

• Frame: High-strength stamped steel

• Tinsel Leads: Stitched-on Mini-XL leads

• Recommended Enclosure: Ported

Technical Specifications

Enclosure Recommendations

For the intended performance of the E-Series v.7 8-inch subwoofer, Sundown Audio specifies a ported enclosure with approximately 0.65 cubic feet of net internal airspace, tuned to 35 Hz, with 9 square inches of port area.

These enclosure figures are a starting point for planning your build. Confirm the final net volume after accounting for the subwoofer, port and any internal bracing. A sealed enclosure is not recommended by the manufacturer.

Installation & Compatibility

Before purchasing, confirm that your enclosure has sufficient mounting depth and the correct cutout dimensions. The subwoofer requires approximately 4.98 inches of mounting depth and a 7.25-inch cutout.

The dual 2-ohm voice coils can be wired in parallel for a 1-ohm final load or in series for a 4-ohm final load. Choose an amplifier that supports the resulting impedance and provides suitable power for a 400W RMS subwoofer. Follow a proper wiring diagram to connect both voice coils correctly.

Pro Audio Center Tip: For a compact system built around one 8-inch subwoofer, prioritize a properly designed ported enclosure and an amplifier stable at your intended final impedance. Correct box design and impedance matching are essential to getting the most from this subwoofer.