Rockford Fosgate Punch P400X4 4-Channel AmplifierThe P400X4 is perfect for 4 way front stage rear fill or 3 way front stage subwoofer systems. Simply drop a pair of component speakers on the front channels and subs on the rear and BOOM you got "The PUNCH." With its flexible design, the P400X4 is an excellent amplifier choice for virtually any vehicle. FEATURES AT A GLANCE 12dB octave Butterworth crossover High level input capable with Auto Turn On circuit Features C. L. E. A. N. Set up On board

DS18 6PRO300MB-4

43" / 138mm

Connectivity is key

Dimensions (H x W x L): 3

Available in both 10 and 12-inch variants

iPod Nano (7th generation)

Effortlessly save presets for specific songs or genres

SiriusXM-Ready™

Output Power

58" / 218mm

simply on the specs and build

Mechanical Mass w/o air Mmd