Pioneer Premier PRS-D4200F
Pioneer's high-end equipment usually deserves serious consideration, so it should come as no surprise that one is listed here for 'best 4-channel car amplifier'. This particular model is part of Pioneer's 'Stage 4' collection of the highest-performing car audio components, including the DEX-P99RS CD player. The PRS-D4200F is equipped with ICEpower components, which allow this amplifier to put out clean, distortion-free signals. Total power output is 75 watts RMS at 4 ohms and 150 watts RMS at 2 ohms, or you can bridge the connections for a total of 300 watts RMS through 2 channels. Pioneer has gone to great lengths to ensure that the signal output is distortion-free, including equipping the PRS-D4200F with gold-plated speaker terminals. The class D design of the amplifier ensures high efficiency and low heat, so the PRS-D4200F is reliable as well as powerful.