(2) W65K9D4 6.5" Car Audio Subwoofers + Mono Amplifier + Amp Kit

Two K9 W65K9D4 6.5-inch subwoofers, a CXA400.1 400W RMS mono Class D amplifier, and a 4 gauge wiring kit in one package. Each sub handles 250W RMS (CEA rated) with dual 4-ohm voice coils. Wire each sub's coils in parallel for 2 ohms, then both subs in parallel for a 1-ohm total load, and the amplifier drives them with clean, controlled power.

The subs use the K9 platform: a 66 oz double-stacked magnet, a 2-inch ASV voice coil wound with USA-made OFC wire, and a cast aluminum basket. The non-pressed paper cone is rigid enough to handle high power in a compact frame, and the 5.94-inch cutout with 4.17-inch depth fits in tight locations. The CXA400.1 amplifier runs Class D topology for efficient power delivery and includes variable bass boost with up to 6 dB of extra low-frequency output. It is 1-ohm stable, giving you wiring flexibility across a range of configurations. The included RWK41 wiring kit supplies 17 feet of 4 gauge power cable, a 100% copper RCA pair, and all the fuses and connectors needed for a full installation.