10 Best 4 Channel Amplifiers For Car Audio 2025 in the United States

The Alpine S-A32F S-Series Class D 4-Channel Amplifier is a solid choice for those looking to enhance their car audio experience. With a power output of 55 watts RMS per channel at 4 ohms and up to 80 watts at 2 ohms, it delivers a decent amount of power for most mid-range speaker setups. The 160-watt bridged output at 4 ohms is particularly useful if you want to drive larger speakers with more power.

One of the strengths of this amplifier is its flexible crossover features, allowing you to adjust high and low-pass filters between 50-400 Hz. This means you can fine-tune the sound to your liking, which is great for audiophiles who want a customized listening experience. Additionally, the amplifier's compact size (11 x 11 x 5 inches) makes it easier to install in various locations within your car without taking up too much space.

There are a few drawbacks to consider. The power output is adequate for standard setups, but it might not be sufficient for more demanding audio systems or for users looking to crank up the volume significantly. Also, the power supply voltage is fixed at 14.4 volts, which may limit its versatility in some installations. While some users may expect even more performance, especially if they're upgrading from a more powerful model.

The DS18 SXE-1200.4/RD 4-Channel Car Amplifier offers a high-performance boost to your car audio system. With its Class A/B design, it promises efficient power delivery with a power output of 60W x 4 channels at 4 ohms, 100W x 4 channels at 2 ohms, and 200W x 2 channels bridged at 4 ohms. This makes it suitable for enhancing the sound quality of various speaker setups in your car. The amplifier's fully variable crossover and adjustable gain input sensitivity allow for customizable audio tuning, which is a great plus for those who are particular about their listening experience.

Additionally, its compact size (9.8 x 5.5 x 1.8 inches) and lighter weight (4.09 pounds) make it easy to install in a variety of vehicles without taking up much space. Despite this, the DS18 SXE-1200.4/RD remains a solid choice for those looking to upgrade their car's audio system with a powerful yet compact amplifier.

The Taramps TS 400x4 is a solid choice for anyone looking to enhance their car audio system with a versatile and powerful amplifier. It delivers 400 watts RMS spread across four channels, providing ample power for crisp and clear audio. The option to bridge two of the channels offers flexibility, allowing for different setup configurations.

This amplifier operates with a low total harmonic distortion (THD), ensuring minimal audio distortion and maintaining sound quality. Additionally, with a good signal-to-noise ratio (SNR), the TS 400x4 minimizes background noise, offering a cleaner audio experience. The fixed crossover feature helps in filtering frequencies for optimized sound performance, and the adjustable input sensitivity ensures compatibility with various audio sources.

The compact size (4.76 x 1.93 x 5.43 inches) makes it easy to install even in limited space within your vehicle. Despite this, the short-circuit protection and LED indicators add to its reliability and ease of use. This amplifier is particularly suitable for users looking for a cost-effective and powerful upgrade to their car audio system, while still offering protection features and ease of installation.