Alpine PDX-F4 Car Amplifier
The Alpine PDX-F4 proves that not all powerful amplifiers have to come in giant sizes. This particular amplifier is of a Class-D design, which means a smaller overall package is possible while keeping high power output levels. The dimunitve size of the PDX-F4 hides the fact that this amplifier puts out 100 watts RMS per channel, whether set up with 4 ohm or 2 ohm impedance ratings. Bridging the outputs yields 200 watts RMS through 2 channels, which is suitable for connecting subwoofers. If your car or truck is tight on space, Alpine designed these amplifiers to be stacked on top of one another, thereby saving even more space than comparable 'compact' amps.