inputs.text: alpine - pdx one best amps market consistently impressed much power quality efficiency packed little things installed first generation pdx amp truck years ago teeny tiny amp pushing close 600 wrms never giving problems purchased 2 new pdxf4 amps boat absolutely love take beating engine compartment day long churning incredible output not single issue theyre also efficient run hours hours single battery charge get pretty hot found normal give airflow compare size price new jl audio stuff see pdx line also great value update 72015 still running strong taking incredible abuse running years impressed ability amps consistently push great sound battery voltage drops