JL Audio MX500/4 Compact marine/powersports 4-channel amplifier — 70 watts RMS x 4

Product info:

• 4-channel amplifier
• 70 watts RMS x 4 at 4 ohms (125 watts RMS x 4 at 2 ohms)
• 250 watts RMS x 2 bridged at 4 ohms (4-ohm stable bridged)
• variable low- and high-pass filters (35-300 Hz, 12 dB/octave)
• Class D amplifier design with NextD™ switching amp technology
• IPX7 water-resistance rating
• corrosion-resistant cast aluminum chassis
• 4-gauge power and ground leads and a 50-amp fuse recommended — wiring and hardware not included with amplifier
  
• no onboard fuses — when installing multiple amps in a system, an additional 50-amp in-line fuse between the distribution block and the amplifier is recommended
• 9-3/8"W x 1-13/16"H x 4-9/16"D