• SHALLOW 6.5 INCH SA SERIES SUBWOOFER: Designed for big bass in tight spaces with only about 3.8 inch mounting depth, perfect for compact custom enclosures and underseat installs.
• 300 WATT RMS 600 WATT PEAK POWER: Handles 300 watts RMS and 600 watts peak so this 6.5 inch sub can take real power and daily abuse in properly built ported boxes.
• ENGINEERED FOR TINY PORTED BOXES: Optimized for small enclosures with 0.30 cubic foot ported volume, 40 Hz tuning, and 4 square inch port area for strong low frequency output.
• LONG STROKE MOTOR DESIGN: Features 10 mm one way linear Xmax with X mech more than double that, plus hyper extended pole to reduce the risk of bottoming out at high excursion.
• LOW DISTORTION MOTOR WITH FARADAY RING: Solid pole with vent channels and magnet ID Faraday ring help control heat and inductive distortion for cleaner, more controlled bass.

Sundown Audio 6.5" 300 Watt RMS Dual 2-Ohm Voice Coil Subwoofer SA-6.5SW

This Listing Includes:

• (1) Sundown 6.5" Subwoofer SASERIES-6.5-D2

The Sundown Audio SA Classic 6.5 Inch D2 subwoofer is built for enthusiasts who need serious bass in places where larger woofers simply will not fit. This compact 6.5 inch sub packs a 300-watt RMS and 600-watt peak rating into a shallow frame with about 3.75 inch mounting depth, making it perfect for under-seat, behind-seat, and tight custom enclosures.

To reduce depth even further, Sundown uses a solid pole design that allows the back plate to rest close to the back wall of the box. This design makes the most of limited enclosure space without giving up the excursion and motor strength people expect from an SA series woofer. A full 10 mm of Xmax and robust mechanical limits mean the SA Classic 6.5 D2 can move real air for its size.

On the electrical side, the dual 2 Ohm voice coil configuration offers flexible wiring for 1 Ohm or 4 Ohm amplifier loads. A large aluminum Faraday ring smooths the acoustic response and helps control inductive distortion, while high-temperature voice coil wire and integrated vent channels keep the motor cool under long term use. Spring-loaded terminals make wiring clean and secure.

The SA Classic 6.5 D2 is tuned to work in very compact enclosures. A 0.30 cubic foot ported box with 4 square inches of port area and a 40 Hz tuning frequency is recommended for strong low frequency output. Sundown also provides detailed fourth-order bandpass specs for advanced builders who want to maximize performance in a small footprint, as well as sealed and hybrid options for different goals.

Features

• Dual 2 Ohm voice coils


• Large aluminum Faraday ring for smooth acoustic response


• High-temperature voice coil wire


• Spring-loaded speaker terminals


• Integrated vent channels for enhanced cooling


• Solid pole design to minimize effective depth

Specifications

Thiele Small Parameters

• RE D2 (Ohms): 4.0


• FS D2 (Hz): 48.9


• VAS D2 (L): 4.1


• Qes D2: 0.54


• Qms D2: 4.82


• Qts D2: 0.46


• Le D2 (mH): 1.69


• BL D2 (NA): 17.9


• Mms D2 (grams): 74.8


• Cms D2 (uM per N): 0.14


• Sensitivity D2 (dB at 1W 1m): 81.6

Recommended Enclosures (D2 / Same box specs)

• Sealed Enclosure Size: 0.15 cubic foot


• Ported Enclosure Size: 0.30 cubic feet


• Recommended Port Area (ported): 4 square inchs


• Recommended Port Tuning (ported): 40 Hz

Fourth Order Bandpass (Advanced Builders)

• 4th Order Sealed Side Volume: 0.112 cubic foot


• 4th Order Ported Side Volume: 0.375 cubic feet


• 4th Order Port Area: 7 square inches


• 4th Order Port Length: 6 inches

Dimensions

• Mounting Depth: 3.75"


• Cutout Diameter: 5.875"


• Motor Diameter: 5.51"


• Displacement: 0.02 cubic foot