JL Audio AP300/1 Compact Monoblock Marine Subwoofer Amplifier, Class D, 350W RMS at 2 Ohm, IP67

The JL Audio AP300/1 is a single-channel Class D amplifier made specifically to drive a subwoofer on a boat. It delivers 200 watts RMS into 4 ohms or 350 watts RMS into 2 ohms from a compact chassis only 1.86 inches tall, and the Class D layout draws less from the battery for its output than a Class AB design. The housing is ignition protected and IP67 rated against water and dust, with the cables excluded from that rating.

An integrated LCD allows settings to be adjusted by hand. When the amplifier is paired with a Fusion stereo that has built-in DSP and the Fusion Audio app, the Easy Tune feature unlocks selectable profiles that simplify setup and help protect the system. Input sensitivity switches between low and high ranges to match different source units, and protection circuits cover input under and over voltage, over temperature and output short circuits.

• 1 channel Class D: 200 W RMS x 1 at 4 ohms, 350 W RMS x 1 at 2 ohms
• Frequency response: 10 to 50 Hz
• Input sensitivity: 200 mV to 2 V RMS (low) or 800 mV to 8 V RMS (high)
• User-selectable high-pass, low-pass or full-range filter
• Operating voltage: 9 to 16 VDC; idle current 700 to 750 mA
• Fuse rating: 35 A (AFS, AGU or MaxiFuse types)
• IP67 water and dust rating (excluding cables), ignition protected
• Size: 1.86 in. H x 10.43 in. W x 4.9 in. D