If you're still using your head unit for amplification, you have no idea what you're missing! Head units are often unable to provide the loud, dynamic sound you want, and can distort (or even damage) your speakers at even medium volume levels.
That's where the BOSS RIOT Series of amplifiers comes in. Tried-and-true Class AB amplifier topology, 2-ohm stable (for powering a pair of 4-ohm speakers off a single channel), and way more than enough power for even the hungriest door, dash, or deck speaker.
BOSS built the RIOT Series amplifiers with advanced features that are usually associated with amplifiers at more than twice the price: thermal and short circuit protection, soft turn-on circuit, remote turn-on/off, nickel-plated low-level and high-level inputs, LED power and protection indicators, all housed in a stealth black anodized aluminum chassis. Mounting hardware included.
Specifications: • Power output: 4 x 50W RMS (@ 4 ohms), 4 x 100W max (@ 2 ohms) • Frequency response: 12 to 22,000 Hz • Signal-to-ratio: 90 dB • Total harmonic distortion: 0.01% @ RMS power output • Dimensions (L x H x W): 9" x 2.0625" x 10.625".