Rockford Fosgate’s Punch P500X1bd subwoofer amp can produce up to 500 watts RMS, giving you plenty of clean power for your rhythm track. And the P500X1bd can drive a 1-ohm load, so you can power multiple subs without any trouble. A low-pass filter keeps the high notes away from your sub, while a subsonic filter helps you rein in runaway boom. The Punch bass boost lets you add some of that boom back into the mix when it’s needed.

If that blue light turns solid red while you’re playing music, the amp’s telling you that your source is distorting and you should turn it down, or risk damage to your gear. The optional PLC2 remote level control also doubles as a clip indicator, so you can see from the front seat if your music’s clipping. The amp’s built-in computer keeps tabs on the output current, ensuring that plunging speaker impedances (they change during play) or even a short circuit won’t hurt anything.

Rockford Fosgate’s Dynamic Thermal Management system uses forced air to dissipate heat evenly across the amp and out through the high-mass heatsink, efficiently drawing heat away from vital internal parts. Their proprietary MEHSA cooling process maximizes the heat transfer from the MOSFET devices to the heatsink, allowing the heat to escape more readily, so the transistors stay cooler and work better.

• variable low-pass filter filter (50-250 Hz, 12 dB/octave)
• selectable subsonic filter (28Hz, 12 dB/octave)
• variable PEQ2 bass boost (0-18 dB at 45 Hz)
• C.L.E.A.N. gain setup system includes test tone CD
• test tones also available as MP3 download from Amazon On Demand, Rhapsody, Google Play, and Spotify, labeled “3sixty.3 setup disc” (Punch amps and the 3sixty.3 use the same test tone tracks for setup)
• Class-BD amplifier design
• frequency response: 20-250 Hz
• Dynamic Thermal Management and MEHSA MOSFET cooling systems
• MOSFET power and output stages
• preamp inputs and outputs