You get big power from a small package with Alpine's PDX Series amplifiers. Super-efficient Class-D technology allows these pint-sized powerhouses to run cool, so they can be stacked together in a multi-amp setup, freeing up valuable space in your car.

The PDX-5 5-channel amplifier supplies a full 75 watts RMS to four channels and 300 watts RMS to a subwoofer channel. You can drive your front and rear speakers, along with a subwoofer, with this compact amp — it's about the size of a small town phone book. Alpine uses smart design and high-quality internal components to keep the power going strong, even when you're pushing your system hard.

Use the adjustable frequency filters to tune your system for peak efficiency; the front-mounted controls make it easy to tweak your sound after the amp's installed. Alpine uses corrosion-resistant gold plating on the RCA inputs and power connections to promote superior signal transfer. Special quick-connect speaker wire plugs slide in for a tight connection, guaranteeing that your speakers are in phase.

• 5-channel car amplifier
• 75 watts RMS x 4 + 300 watts RMS x 1 at 4 or 2 ohms
• 150 watts RMS x 2 + 300 watts RMS x 1 in bridged mode (4-ohm stable in bridged mode)
• CEA-2006 compliant
• stackable installation design with front-panel controls
• variable high- and low-pass filters (30-400 Hz, 12 dB/octave)
• quick-connect speaker connectors
• Class-D amplifier design
• MOSFET power and output stages
• fuse rating: 30A x 2
• 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
• 10-3/16"W x 2-1/2"H x 8-3/8"D
• warranty: 1 year