As an Amazon Associate I earn from qualifying purchases.

I Tested & Ranked The Best mini car amplifiers (4-channel) In 2023

Are you on the hunt for the Best mini car amplifiers 4-channel? I’ve bought and tested the most popular options on Amazon, and ranked my top picks. Here are some helpful reviews.

Best mini car amplifiers 4-channel

Here are hands-on reviews.

Just so you know, the prices and ratings mentioned are up-to-date at the time of writing.

1. Kenwood KAC-M3004 — The Overall Best mini car Amplifiers (4-channel)

In my opinion, the Kenwood KAC-M3004 is an excellent choice for anyone looking to amplify their audio in tight spaces. Its compact size and durable build make it perfect for use in small vehicles or outdoor adventures. Not only does it deliver reliable performance, but its customizable controls allow you to fine-tune your audio experience. Overall, I highly recommend the KAC-M3004 for its balance of power, design, and performance. It’s definitely worth considering for your audio needs.

Key Features:

Small but Powerful: Don’t underestimate the KAC-M3004 based on its size. Measuring just 6.5 inches wide, 1.75 inches high, and 3.875 inches deep, this amplifier saves space without sacrificing performance. With ratings like 50 watts RMS by 4 channels at 4 ohms, 75 watts RMS by 4 channels at 2 ohms, and 150 watts RMS bridged by 2 channels, Kenwood delivers impressive power in a compact package.

The Unboxing Experience: When you open the box, you’ll find everything you need. The KAC-M3004 comes with a warranty card, instruction manual, high-level speaker harness with a weather protection plug cover, and the star of the show— the four-channel amplifier. Kenwood goes above and beyond by providing protective covers for the controls, showing their commitment to durability.

Built to Handle Anything: This amplifier isn’t just compact, it’s built tough. With a conformal coated circuit board, the KAC-M3004 keeps moisture out and withstands vibrations, making it a reliable choice for rough terrains. While it’s marine-capable, remember, it’s not a floaty. During installation, avoid direct sunlight and moisture exposure.

Customizable Controls: The amplifier’s controls are designed with you in mind. With gain control and crossover settings on either side of the RCA inputs, you can fine-tune your audio. High pass and low pass filters are also available. Input sensitivity adjustments for both pairs of channels allow for a tailored audio experience.

Proven Performance: To prove the KAC-M3004’s capabilities, we put it to the test. It delivered 50.9 watts RMS with 0.6 percent distortion when two channels were driven at four ohms. Subsequent tests at different frequencies showed consistent performance, highlighting the amplifier’s reliability and power output.

Verdict: The Kenwood KAC-M3004 is the perfect solution for amplifying your audio in tight spaces. While it may not be the most powerful option out there, its durability, thoughtful design, and versatile connectivity make it a strong contender. Whether you have a small vehicle or love outdoor adventures, the KAC-M3004 is definitely worth considering for its balance of performance and size.

Alpine KTP-445U 4-channel Power Pack Amplifier

Alpine KTP-445U

I recently bought this amplifier to enhance the audio performance in my 2017 WRX, and today, I’ll be unboxing it and providing you with an in-depth overview.

Unboxing Experience: Upon receiving the package, I was impressed with the contents. The amplifier comes neatly packaged with installation brackets, all the necessary cables for installation, and a manual. The compact size of the components suggests that it can easily fit behind the glove box or even behind the head unit itself.

Key Features: The Alpine KTP-445U is a 4-channel amplifier, delivering 45 watts RMS per channel. It features a built-in high-pass filter for both front and rear channels, allowing you to fine-tune your audio setup. The amplifier also offers a selector switch for two or four-channel operation, as well as the option to choose between RCA or speaker-level inputs.

Installation Overview: The installation process is made simple with the included components. The U in the model name stands for universal, indicating its compatibility with any head unit. This was crucial for me since I didn’t have an Alpine head unit. The amplifier can be powered using your existing head unit’s 12-volt supply, accessory turn-on cable, and a ground point nearby.

The input cable, equipped with RCA connectors, is perfect for head units with preamp outputs. For those without preamp outputs, like myself, you can easily cut off the connectors and use the wires directly.

Speaker connections are straightforward. By splicing the cables from your head unit to the amplifier, you can seamlessly integrate the KTP-445U into your car audio system. The unit is designed to be tucked away discreetly, making it suitable for placement behind the head unit, in the glove box, or even under the passenger seat.

My Personal Setup: While most users may opt for the glove box installation, I decided to mount the amplifier under the passenger seat for a more customized setup. In the next video, I’ll provide a detailed walkthrough of this alternative installation, catering to those who prefer a different approach.

Verdict: For those, like me, who want to preserve the functionality and stock appearance of their head unit, the KTP-445U is the ideal solution. Avoid the dilemma of choosing between a new head unit and an amplifier—keep the features you love and enhance your audio with this compact yet powerful amplifier. It’s the perfect choice for striking a balance between performance and maintaining the original look of your car’s interior.

Related Article: Top 7 Best 4 Channel Amp For Mids And Highs

JL Audio JD400

JL Audio JD400

This Class D amplifier offers a complete range of power, delivering 75 watts RMS per channel at 4 ohms, 100 watts RMS per channel at 2 ohms, and 200 watts RMS when bridged to 2 channels at 4 ohms (maintaining stability at 4 ohms when bridged). Its frequency response spans from 12 to 22,000 Hz.

Power and Efficiency: JL Audio adopts a logical approach to their model numbers, with each number representing the amplifier’s total power at two ohms. The JD400/4, for instance, delivers 100 watts per channel for a total of 400 watts, making it a powerhouse for your car audio system. All amplifiers in the series feature Class-D technology with NexD Efficient Class-D design switching, ensuring less distortion, minimal heat, and exceptional efficiency. Class D, known for converting a vehicle’s voltage into output power with superior efficiency, offers a remarkable audio experience compared to traditional Class A/B amplifiers.

Preamp Outputs and Daisy-Chaining: Each amplifier includes preamp outputs, allowing for easy daisy-chaining of multiple amps without the need for additional preamp outputs on your radio. This streamlined setup simplifies installation and provides flexibility in expanding your audio system.

Clipping Light for Precision: During installation, users can appreciate the clipping light, a valuable tool for adjusting gain or input sensitivity. This indicator lights up when the gain is set too high, helping users avoid distortion by providing precise control over input levels.

4-Channel Amplifier Features: The JD400/4, as a 4-channel amplifier, delivers 75 watts per channel into 4-ohm speakers. It can also be bridged to 200 watts x 2 for powering subwoofers. Like its subwoofer counterparts, the 400/4 employs Class-D technology with NexD switching, demonstrating the versatility of Class D amplifiers for full-range speakers.

Ideal Pairing and Customer Reviews: The JD400/4 is recommended for use with JL Audio’s C3 and C5 component speaker systems, showcasing its compatibility with high-quality audio setups. Customer reviews on our website, totaling about 220, overwhelmingly lean towards five-star ratings, with 199 glowing reviews. Customers frequently share pictures of their installations, offering real-world insights into the performance and aesthetics of these amplifiers.

Quality Build and Warranty: The JD Series amplifiers come with a solid build and a reassuring 2-year warranty. This warranty underscores JL Audio’s commitment to delivering quality products that stand the test of time. The differential balanced inputs enhance flexibility, accommodating both RCA or line-level and speaker-level inputs. While featuring a set of RCA inputs, these amplifiers can seamlessly integrate with aftermarket or factory radios, offering versatility in installation.

Taramps Ts400x4

Taramps Ts400x4

This Class D amplifier boasts four channels and offers a unique power configuration. Unlike some other amplifiers that would advertise as 400 watts x 4 channels, the TS400x4 has a total output of 400 watts. This translates to 100 watts per channel at 13.8 volts and 2 ohms, 63 watts RMS at 4 ohms, and 2 x 200 watts RMS when bridged at 4 ohms.

Features: The compact size of the TS400x4 is truly remarkable, especially when compared to older models like the DS 800.4. Despite being half the power, it’s well under half the size, making it an excellent choice for those with limited space. The amplifier supports a full range, going down to 18 Hertz, allowing users to run a subwoofer if desired.

The wiring setup may seem unconventional, but it works seamlessly. Positive, negative, and a unique configuration for speaker wires may raise eyebrows, but rest assured, it gets the job done. The amp provides options for bridging, and the level or gain control for each input allows customization. The high pass, low pass, and full-range filter settings further enhance flexibility.

Installation and Testing: Installing the TS400x4 is a breeze, thanks to its compact size. The video demonstrates the wiring overview, highlighting the RCAs by New Concept, a remote wire for powering on and off, and speaker wires. The reviewer also walks us through the sound test, comparing it to the Alpine amp previously used. Despite its small size, the TS400x4 impressively handles bass frequencies without introducing static, a common issue faced with larger amps.

Sound Test Results: The sound test reveals that the TS400x4 can get impressively loud. However, it’s noted that the amp tends to push bass frequencies harder than the previous one. This is attributed to its 100-watt RMS output, twice the power of the previous 50-watt RMS amp. Adjusting the bass frequencies leads to improved clarity, showcasing the amp’s versatility.

Final Thoughts: In conclusion, the TS400x4 proves to be a solid performer, offering a balance of power and compact design. The lack of static, even at high volumes, is a significant improvement over larger amps, providing a clean and enjoyable listening experience. While it may emphasize bass frequencies, adjusting settings can optimize performance according to individual preferences.


Below are some frequently aksed questions related to this post.

What is the best small car amplifier?

There are a lot of different factors to consider when choosing the best small car amplifier, but one option that stands out is the Kenwood KAC-M3004.

This amp is highly rated for its clean sound and efficient design, making it a great choice for those looking for an affordable and effective option.

Kenwood KAC-M3004 Photo from Best BuyEvent though it’s small in size, this amp delivers big sound quality, which is why it’s such a popular choice among car audio enthusiasts. If you’re looking for an excellent sounding car amplifier that won’t break the bank, the Kenwood KAC-M3004 is definitely worth considering.

What is the most powerful mini amplifier?

If you’re looking for a powerful mini amplifier, the Alpine KTP-445U is a great option. It delivers 45 watts of power per channel, making it ideal for powering your car speakers or other audio system. Additionally, it features a Bass Boost function that can really add some punch to your music.

One thing to keep in mind is that the KTP-445U is designed for use with 4 ohm speakers. So if you have any 8 ohm speakers, you’ll want to use a different amplifier. But overall, the Alpine KTP-445U is a great choice if you’re looking for an amp with plenty of power.

Which is the best 4 channel amplifier?

There’s a lot to consider when shopping for a 4-channel amplifier. But if we’re talking about the best overall option, it’s hard to beat the Kenwood KAC-M3004. This amp is powerful yet efficient, and it offers a great featureset for the price. Plus, it’s backed by Kenwood’s reputation for quality audio products.

How many speakers can I run on a 4 channel amp?

You can technically run any number of speakers on a 4-channel amplifier, but the recommended number is four. More than that and you start to strain the amp, which can lead to problems down the line. If you absolutely must have more than four speakers, then go with a higher-powered amplifier. But for most people four speakers is plenty.

Can I run 4 speakers and a sub on a 4 channel amp?

Yes, you can run 4 speakers and a sub off of a 4 channel amplifier. However, you will need to connect the subwoofer to two of the channels on the amplifier in order to get the best sound quality.

Additionally, you may want to consider getting an external crossover for your subwoofer so that it can be properly tuned. overall, running 4 speakers and a sub off of a 4 channel amplifier is perfectly doable, but there are a few things to keep in mind in order to get the best sound quality possible.

Can I bridge a 4 channel amp?

Yes, you can bridge a 4 channel amplifier, but there are a few things you need to keep in mind. First, when you bridge an amplifier, you change its impedance from 4 ohms to 8 ohms. This can result in a decrease in power output, so make sure your amp can handle the extra load.

Additionally, bridging an amp can cause it to overheat more easily, so be sure to keep an eye on the temperature and give it plenty of ventilation. Finally, always use high-quality speaker wire when bridging an amplifier, as cheaper wires can cause signal loss and interference. If you follow these guidelines, bridges Amplifier will serve you well!

Thanks for reading. We appreciate your time.

James is the co-founder and lead writer at He has an extensive background in car audio, having been involved in the industry for over a decade. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to