10 Best Car Amplifiers 2025 in the United States

The Kicker 46CXA12001 CXA12001 Mono Class D Subwoofer Amp is a strong contender in the car amplifier category, notably for its impressive power output of 1200 watts and stability down to one Ohm. This makes it an excellent choice for those looking to enhance their car audio system with multiple subwoofers. Its size, measuring 12 x 6.75 x 2.38 inches, allows for flexible installation options, and it includes mounting hardware for both vertical and horizontal setups, catering to various user preferences.

One of its key strengths is the adjustable crossover and KickEQ bass boost, which offer users a good degree of control over their sound settings. The inclusion of a 24dB subsonic filter is another plus, allowing for customization that can enhance audio quality. The amp operates efficiently, requiring as little as nine volts of power from your battery, making it suitable even for vehicles with less powerful electrical systems.

The Kicker 46CXA12001 is a robust option for enthusiasts looking to amplify their subwoofer performance with flexibility in sound control and installation. It's best for users focused on enhancing bass and overall sound impact in their vehicle.

The BOSS Audio Systems PV3700 is a 5-channel car stereo amplifier delivering a high output power of up to 3700 watts. It performs well in terms of flexibility, supporting both 2-ohm and 4-ohm impedance, which means it can drive different types of speakers and subwoofers efficiently. It features low and high-level inputs, making it versatile for various installation setups. Being bridgeable adds to its utility, allowing you to combine channels for more power to your subwoofer.

The full-range capability and variable bass boost offer precise control over the sound quality and bass levels, enhancing your audio experience. It boasts a low total harmonic distortion (THD) of 0.01%, ensuring clear and precise sound output. The signal-to-noise ratio of 103 dB is commendable, reducing background noise for a cleaner listening experience. Its dimensions (17” x 10.3” x 2.3”) and weight (12.5 lbs) make it relatively easy to install, though professional installation is recommended. The high/low pass crossover feature allows better sound customization, separating frequencies to ensure each speaker plays the appropriate range.

However, the amplifier is relatively large, which might pose installation challenges in smaller vehicles. Also, the product has been available since 2015, which may mean it's lacking some newer features found in more recent models. Despite this, a 6-year warranty available when bought through Amazon offers peace of mind for the long-term. This amplifier suits users looking for a robust, versatile, and powerful solution for their car audio system.