I have 6 in really good condition,

Features

• A quasi-bandpass subwoofer with two 15-inch LF drivers.
• High-response deep bass as low as 42 Hz is delivered to reproduce a tight and punchy kick.
• Two drivers efficiently generate air vibration to boost radiation efficiency.
• Requires an active crossover to set the necessary frequency range (presets can be provided from Pioneer for combinations using the Pioneer XY-152, XY-122, XY-101 and XY-81).
• NL4 INPUT and LINK OUT connections as standard.
• Robust enclosure made from premium multi-laminate birch plywood.