10 Best 4 Channel Amplifier 2025 in the United States

The Taramps TS 1200x4 is a powerful 4-channel amplifier that delivers 1200 Watts RMS, with each channel providing 300 Watts RMS. This makes it a great choice for those looking to enhance their car audio system with strong and clear sound. It supports a variety of speakers, including subwoofers, woofers, and tweeters, ensuring versatility in your setup.

The amplifier features both high-level and RCA inputs, giving you flexibility in how you connect your audio sources. Additionally, it has a fixed crossover with options for high-pass, low-pass, and full range, allowing you to fine-tune the sound to your preference. Installation is straightforward with its compact size and surface mount design, although you will need to ensure you have a 60A circuit breaker or fuse for safe operation.

Weighing in at just under 3 pounds and with dimensions of 5.43 x 1.89 x 9.84 inches, it won't take up much space in your vehicle. The amplifier also boasts a sturdy build with heavy-duty power supply cables, ensuring durability and reliable performance.

The Taramps TS 400x4 Black is a solid choice if you’re looking for a 4-channel car amplifier that offers good power and flexibility without a high price tag. It delivers 400 watts RMS total (100 watts per channel at 2 ohms), which is enough to drive typical door speakers, tweeters, and even mid-range speakers comfortably. You can also bridge the channels in pairs to get 200 watts per channel at 4 ohms, which is useful if you want to power subwoofers or more demanding speakers.

The amplifier features both RCA and high-level inputs with automatic turn-on, making it easy to integrate with most car audio setups. It has fixed high-pass and low-pass crossovers at 90Hz, which help separate frequencies for clearer sound but don’t offer adjustable settings, so you might need additional tuning elsewhere if you want more control. Installation is straightforward due to its compact size (about 5.4 x 5.2 inches) and freestanding design, though the fixed cable thickness means you should use proper wiring for best performance.

This amplifier is a good match for everyday users upgrading their car sound system with door speakers, tweeters, or light subwoofers, offering reliable power and decent sound clarity. For those seeking more advanced tuning options or higher-end sound quality, its fixed crossovers and limited specifications may feel a bit restrictive.

The Alpine S-A32F S-Series Class D 4-Channel Amplifier is designed to enhance the audio experience in your vehicle, making it a solid choice for car audio enthusiasts. With a power output of 55 watts RMS per channel at 4 ohms and 80 watts at 2 ohms, it delivers robust sound performance suitable for various setups. The amplifier is also capable of producing a bridged output of 160 watts at 4 ohms, which can be useful if you want to drive larger speakers or a subwoofer.

One of the key strengths of this amplifier is its compliance with the CTA-2006 standard, which ensures that its performance claims are reliable. The variable high- and low-pass filters allow for fine-tuning the sound to match your specific audio preferences and speaker capabilities, ensuring that you get the most out of your audio system.

In terms of size, the S-A32F is relatively compact, measuring 11 x 11 x 5 inches, which makes installation in various vehicles manageable without taking up too much space. However, there are some limitations to consider. The amplifier requires a specific supply voltage of 14.4 volts, which may not be compatible with all vehicles unless modifications are made. Additionally, while its output power is respectable, it may not be sufficient for users looking to power larger systems or who have higher audio demands. The 860 watts output power could be misleading, as that figure represents total dynamic power rather than continuous RMS output.

The Alpine S-A32F is an excellent option for car audio enthusiasts who seek reliable power and adjustable sound settings in a compact unit. It may not be ideal for those looking to drive very high-demand audio systems, but for most standard applications, it fits well within the 4-channel amplifier category.