JBL MA6004 4 Channel Amplifier
MA6004
 JBL 4-Channel Amplifier 
- Fully marinized circuit boards to keep salt and corrosion away from the critical circuit path
 - Onboard 12dB electronic crossovers to provide tuning options for systems of any size
 - Variable bass-boost circuit provides additional bass tuning to optimize performance, regardless of location
 - Low-profile heatsink allows for installation in tight spaces
 - Large-gauge barrier strips allow easy hookup and use of larger-gauge premium power, ground and speaker cable
 - MA6004: 145 Watts at 2 ohms, 60W RMS x 4 channels at 4 ohms and less than or equal to 1% THD + N