Choosing and Installing Car Speaker Amplifiers in 2023 – A Step-by-Step Guide

When building a sound system, you must check that your car’s speakers work correctly. Also, you need an amplifier to upgrade the speakers that came with your car or add a subwoofer. This is an integral part of your car’s audio system, so it is essential to know how to get the most out of it.

Many users wonder if their amplifier should be more robust than their speakers.

When my team’s experts use and test it, they recommend using an amplifier with about twice as much power as the speaker’s power rating. So, for example, if a speaker is rated at 200 watts, we use a 400-watt amplifier. But, again, the idea is to have enough clean power to handle anything you throw at the amp without clipping.

If you are inexperienced with amplifiers, it may be tough to determine which option is the best. The most effective way to choose the best amplifier for your needs is to conduct research.

This article will examine the many types of car amplifiers and why you should consider a few things before buying one. Keep reading our article to learn about choosing and installing car speaker amplifiers.

What is a car amplifier?

What is a car amplifier

An automotive amplifier is a piece of audio equipment used to boost the signal from the car speakers. This amplifier connects to the speakers and boosts the electrical signal from the car so that the speakers may properly play music. The power ratings of these amplifiers govern the frequency range they can replicate.

The amplifier is connected to the car’s speakers, allowing you to listen to music while driving. Various types of music can be heard while going.

What sets one amplifier apart from another? Most car amplifiers have variable low-pass filters, phase-locked loops, and equalizers. When choosing an amplifier, you should consider the input connection’s size. The larger the input jack, the more power your amplifier can accept.

What’s the Difference Between Car Speakers and a Car Amplifier?

A car amplifier is a piece of equipment that makes the audio signals from the speakers louder. Conversely, automotive speakers are the speakers you install in a vehicle. It performs similarly to how radio would.

They are intended to provide superior sound quality for the inside of your car. Car speakers often have a remote control that allows you to adjust the volume and switch between stations or music.

Why do I need a car amplifier for my speakers?

The sound quality in your vehicle would be better if you had a car amplifier. The vehicle speakers can barely handle moderately loud noises. These low-frequency sounds are intended to be amplified by automobile amplifiers.

2-Way vs 5-Way Car Speakers

The vehicle amplifier is necessary for your car’s speakers since your speakers do not have enough power to run the speakers, and it increases the loudness of the audio signals from the speakers. With amplification, the sounds from your speakers will be quieter. The remote control can adjust the volume level but can be slightly louder.

Some speakers also contain an equalizer that allows you to change the bass, midrange, and treble frequencies. The offset is designed to enhance the sound quality of music and make it appear more natural.

How much power do my aftermarket speakers need?

The power needed by aftermarket speakers is proportionate to their size. It is possible to listen to your favorite music through your car’s speakers, but only if an aftermarket amplifier has been added to boost the song’s volume. Your speakers cannot create enough power to drive the speaker cones without an amplifier, and you will be unable to hear anything.

3 Best Audio Subwoofer Amplifier

Skar Audio RP-1200.1D
Skar Audio RP-1200.1D
  • Brand: Skar Audio
  • Item Dimensions LxWxH: 16 x 6 x 2.5 inches
  • Number of Channels: 4
  • Manufacturer: Skar Audio
  • Color: Black
BOSS Audio Systems R1002 Riot Series
BOSS Audio Systems R1002 Riot Series
  • Brand: BOSS Audio Systems
  • Item Dimensions LxWxH : 5.3 x 9 x 2 inches
  • Mounting Type: Car Mount
  • Number of Channels: 2
  • Color: Black
BOSS Audio Systems R1100M
BOSS Audio Systems R1100M
  • Brand: BOSS Audio Systems
  • Item Dimensions LxWxH: 9.13 x 10.44 x 2.25 inches
  • Mounting Type: Car Mount
  • Number of Channels: 1
  • Color: Black

How many channels should my amp have?

To amplify multiple speakers, it’s necessary to have a separate channel for each one. For instance, if you want to amplify two speakers, you’ll need a two-channel amplifier. However, if you want to add a subwoofer to your current sound system, a single-channel amplifier will suffice to power it. This means you don’t necessarily need a multi-channel amplifier if you only plan to add a subwoofer to your setup.

Amplifier Parts:

An amplifier is made up of three parts:

A power supply, a speaker, and a preamplifier. A battery is typically used as the power source. The loudspeaker provides the energy required for the music to play. Finally, the preamplifier enhances and boosts the loudspeaker’s output power.

Most of the time, two or more speakers are hooked up to the preamplifier to improve their sound. Putting the speaker in your car by hooking it up to the speakers

What to Consider Before Choosing an Amplifier to Power Your Speakers:

Several factors must be considered when choosing an amplifier to power your car speakers. There are many choices, but a few things to consider when choosing an amplifier.


The impedance must be in the 12-ohm range. Most cars should have an impedance of about 16 ohms. This makes sure that there is enough power in the amplifier to run the car speakers.

You should also ensure that the amplifier you buy lets you choose from different power levels. If the impedance is too high, the speakers will require more power to function correctly.


The power should be adequate to match the power requirements of your car speakers. The automotive speakers will only provide the necessary sound if the power is sufficient. You will also notice that the sound is distorted.

A minimum of 5 watts should be used. You might want a more powerful amplifier if your car has a more extensive sound system. It would be preferable if you purchased an amplifier that does not overheat. If you don’t, the amplifier could get too hot and burn out, which would cause the sound to be messed up. As a result, you should avoid amplifiers with output levels greater than 15 watts. It is necessary to use a distortion-free amplifier.

Compatibility with Your Car Stereo:

Stereo compatibility should be configurable manually. The amplifier should provide a remote control as well as a jack input. You must connect it to your vehicle’s audio system if it does not have a jack input. A jack-input power amplifier may be easily attached to a vehicle audio system. It is backward-compatible with a standard speaker wire. If the amplifier does not have a jack connection, it may still be linked to the car audio system through the aux input. A cable is required to connect the amplifier to your vehicle’s audio system.

If the amplifier cannot connect to your car’s audio system, it will most likely not work. In addition, your amplifier should be able to handle music with a broad dynamic range (HDR). You may need to add an audio processor if your vehicle’s audio system can only play music with a low dynamic range.

A high-quality audio processor may convert the CD in your car to digital signals. Using digital signals, your audio processor can create an audio stream with a higher HDR. You would be unable to listen to high-quality music without a sound amplifier. You’ll need an amplifier to hear the full range of music.

How to Setup an Amplifier in Your Car Speakers – Step-by-Step Guide

  1. Choose the appropriate amplifier for your car speakers based on your speakers’ wattage and impedance ratings.
  2. Disconnect the negative battery terminal to prevent electrical shocks and damage to your car’s electrical system.
  3. Find a suitable location for the amplifier, considering it should be easily accessible and well-ventilated.
  4. Connect the power cable from the battery to the amplifier’s power input terminal.
  5. Connect the ground cable from the amplifier to a bare metal spot on your car’s chassis.
  6. Run the RCA cables from the head unit to the amplifier’s input terminals.
  7. Connect the speaker wires from the amplifier to the corresponding speaker terminals, ensuring the positive and negative wires are correctly connected.
  8. Adjust the amplifier’s gain, crossover, and other settings according to your preferences and the capabilities of your car speakers.
  9. Reconnect the battery terminal and test your car speakers to ensure they work correctly.

Amplifier Classes:

There are several types of amplifiers. However, only a handful are often used in car audio. Without delving into technicalities, it is easy to appreciate the pros and cons of each amp class.

The following are the most popular amplifier classes in the business:

Class A Amplifiers:

These amplifiers are designed to provide high-quality sound with low distortion. They are characterized by their high power consumption and heat generation. Class A amplifiers operate by conducting current through their output devices even when there is no signal present.

Class B Amplifiers:

These amplifiers are designed to be more efficient than Class A amplifiers. They use a push-pull configuration of output devices that only conduct current when a signal is present, resulting in less power consumption and heat generation. However, they have higher distortion levels compared to Class A amplifiers.

Class A/B Amplifiers:

These amplifiers combine the best qualities of Class A and Class B amplifiers. They use a push-pull configuration but have a small bias current to keep the output devices conducting even when there is no signal present, resulting in better efficiency and lower distortion.

Class D Amplifiers:

These amplifiers use a switching circuit to modulate the signal rather than traditional analog circuits. They are highly efficient, with less power consumption and heat generation compared to other classes, but can have higher distortion levels.

Class G/H Amplifiers:

These amplifiers use multiple power supply rails to improve efficiency and reduce heat generation. They switch between different voltage levels depending on the signal level, resulting in improved efficiency and lower distortion.


Choosing and installing car speaker amplifiers in 2023 can be a challenging task, especially for those who are new to car audio systems. However, by following the step-by-step guide outlined above, you can ensure that your amplifier is properly installed and configured to provide the best possible sound quality. It’s important to consider factors such as power consumption, heat generation, and speaker compatibility when choosing an amplifier, as well as to follow safety precautions such as disconnecting the battery before installation. With a little bit of research and preparation, you can enjoy the benefits of high-quality sound in your car for years to come.


How should I go about choosing a subwoofer?

Volume and Power
The internal amplifier is the beating heart of the subwoofer, and its main job is to power the speaker driver. Therefore, understanding that energy is measured in watts is critical for choosing a good subwoofer. RMS and peak watts are two types of wattage frequently given in subwoofer specifications.

What are some suggestions for choosing subwoofers for a car stereo?

It is critical to choose the right subwoofer for your automotive system. When looking for the best subwoofer, there are various aspects to consider. The size of the subwoofer should be the first consideration.
Cubic inches are used to measure the volume of a subwoofer. Therefore, subwoofers with 12- and 15-inch diameters are the most effective and extensively utilized.
Most of the time, if you want the best sound quality, you should get a subwoofer with more power than you already have.

Can I boost the volume of my car’s speakers?

The typical volume range for vehicle speakers is 70 to 80 dB (DB). As a result, you must increase the volume on your vehicle radio or amplifier to make it louder.
There are various methods for making automotive speakers louder without using an amplifier. To begin, make sure your speakers are sufficiently powered. Second, you may upgrade your speakers. Third, you can add sound-dampening materials to your vehicle to reduce sound loss. Finally, using these strategies, you may enhance the volume of your vehicle’s speakers without using an amplifier.

How can I know whether my amplifier is compatible with speakers?

When you have speakers and an amplifier, it’s important to make sure they work well together. Speakers have a rating in ohms, which is a measure of their electrical resistance. Most speakers have an ohm rating between 4 and 8. Amplifiers also have a range of ohms they work best with, usually between 6 and 12 ohms. To check if your speakers and amplifier are compatible, you should look at their specifications to see if they match. This will help you avoid any problems with sound quality or damage to your equipment.

What wattage is ideal for an amplifier?

It’s important to choose the right amplifier for your speakers to get the best sound quality. The amplifier should be rated at 700 watts per channel when connected to a pair of stereo speakers with 8 ohms of resistance. This will ensure that the amplifier is powerful enough to deliver clear, undistorted sound. Professional-grade speakers can handle short bursts of power above their rating without getting damaged. This means you can enjoy loud music without worrying about harming your speakers.