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Why You Need an Amp for Door Speakers (For Best Audio)

If you are modifying the sound system of your car, you may be asking – do you need an amp for door speakers? This guide answers this question and looks at why you may need an amp in your car. I’ll also give a bit of background over what amplifiers are, and why they are so useful. 

In short, yes you do need an amp for door speakers. 

Check out this post about the best four-channel amps for more information. 

Do You Need an Amp for Door Speakers

Table of Content

Do You Need an Amp For Door Speakers

An amp can power door speakers, but it is not an essential factor. Many factory car audio systems have built-in amplifiers, and aftermarket head units often have enough power to drive door speakers without an external amplifier. But if you want to upgrade the sound quality and volume, using an external amplifier for the door speakers will be beneficial.

What is an Amp

An amplifier is an electronic device used to control speakers and audio playback. These components are responsible for increasing (amplifying) electronic signals, making them large enough to power speaker cones.

An amplifier is a device that connects to speakers and improves the sound quality of audio by increasing the loudness while also improving the clarity, subtlety, and fidelity of the music itself. Sound from speakers that do not have the capability to provide loud, room-filling sound is amplified by this apparatus according to its name.

An automobile amplifier amplifies a low-voltage electrical signal from the head unit. It has the ability to drive loudspeakers with more power, loudness, and clarity when connected through speaker wire. Most standard car stereos have a maximum output of 15 to 18 watts, and they begin to distort at that point. If you want to power larger, louder speakers, an amplifier can help.

Besides allowing larger, louder speakers to be used, amplifiers also offer a large increase in sound quality and functionality. 

Another use of amps is connecting subwoofers. Because subs require such a large amount of power, most standard car stereos aren’t powerful enough. For this reason, if you want to use a larger subwoofer speakers, you would need to install an aftermarket amp to power your sound system

What is an Amp

Generally external amplifiers increase the sound quality because they use higher quality components and offer more controls and features. Cheaper amps use worse components and often feature a more basic design.

Also Recommeded: Best Headphone Amp

What do amplifiers do?

Amplifiers are used to boost signals. They work using many small components, usually involving transistors. They take an input, for example, a CD player, radio, or mobile phone, and increase the signal, sending it to the output. The output is connected to a set of speakers, which are responsible for converting the electric energy into acoustic energy by moving the magnet inside the cone. 

Some amps also have more complicated controls, sometimes they also have built-in devices, such as the inputs mentioned above. The overall main purpose of amplifiers is to provide power to speakers and increase the energy of audio signals. 

What do amplifiers do

How many channels should my amp have?

Amps should have at least 2 channels for most cars, although you may need 4 if you want speakers in the back and front doors. 

Having 2 channels lets you split the audio signal between the left and right speakers, meaning you get a wider sound with different details on either side. Using 4 speakers is a good alternative for some cars, and works in a similar way, just copying the left and right signals to the back speakers.

If you want more complex setups, then you can always go for an amp with more than four outputs. Some people like to rig up more speakers in their boot, or additional speakers in the roof of their car. You can just choose an amp that has the right amount of channels for your needs. 

If you want to use 4 speakers and a subwoofer then you would need to use a 5 channel amp.

How many channels should my amp have?

Picking an Amp

There are a few factors to consider when choosing amplifiers for your car. This list outlines the most important elements to think about.

  • Brand – if you are loyal to a brand, why not choose one of their amps. Some brands are recognized as being superior to others, using better materials and manufacturing. 
  • Channels – How many channels do you need? Make sure you choose an amp with enough channels to power all the speakers you want to use. At least two minimum. 
  • Controls – Amps can be controlled in a number of ways. Most have controls mounted on their faceplate, usually at least volume, but sometimes other controls. High-end amps often contain equalization controls that let you boost the bass and treble. They give more control over the sound. You may also want something with a pan control, although this is less important.
  • Inputs – What kind of devices do you plan on using with your amp. CD Players? Radios? AUX input? Make sure the amp you buy can connect to what you need it to. Most amps offer a few inputs which can be switched between. Many newer amps also offer Bluetooth connectivity, which makes it easier to connect to your phone. 
  • Extra Features – Some amps provide cool extra features like voice-controlled smart assistants or programmable lights. These can add some extra value to the amp you choose.

Should You Amp Your Door Speakers?

Generally, car door speakers will need amplifying. Cars typically use passive speakers, which means the speakers don’t actually have a power source themselves and rely on the amplifier to provide their power. For this reason, most car door speakers will need an amplifier. 

Should You Amp Your Door Speakers?

What do Door Speakers do?

Door speakers are used in cars to play music and audio. You can fit speakers in a range of places in cars, so door speakers have a relatively specific function, although they can be heard throughout the whole car. The main purpose is to give a balanced audio projection throughout the whole car, distributing the speakers in the best places for acoustics. 

Other Informations

Many audiophiles still believe that an amplifier is required to get good sound. Here are some advantages of using an amp with car door speakers. 

  • You can increase the volume of your car door speakers without making them distort. It also increases the sound quality.
  • Amplifiers may enhance the enjoyment of a road trip by allowing you to crank up the volume on your favorite tunes as you drive.
  • The preamplifier integrated into the door speakers may not be able to tolerate high-level outputs, thus an amplifier gives them more depth.
  • Amplifiers may be able to block out the surrounding noise because of their full volume sound.
  • Using an amp with a subwoofer frees up the energy to power other speakers. 
Types of Door Speakers

Types of Door Speakers

Both factory-installed and aftermarket door speakers are available. Audiophiles prefer that these speakers be installed and positioned inside the car, where they can produce a sound that spreads out from the sides and flutters around to fill the whole interior.

So far, full-range speakers and component speakers are the only two options for door speakers. To put it simply, full-range types are created and organized as an “all-in-one” unit, whereas component types are just that: a collection of discrete parts.

A full-range speaker has a subwoofer, tweeters, midrange speakers, super-tweeters, as well as extra drivers. The lower-frequency sounds are captured by the subwoofer, while the higher-frequency sounds are captured by the tweeters. Drivers in the mid-range are adept at capturing the nuances of the music’s harmony and melody.

Separate tweeters, a separate subwoofer, and an external crossover separate component speakers from the others, allowing them to be strategically positioned in various areas of your vehicle, such as the front and rear doors. You may have sound coming out of any part of your car since the components can be installed anywhere. This is a fantastic piece.

Front speakers are the finest place for an amplifier to be plugged in, since they allow the music to have the maximum effect in front of the automobile. The wattage and compatibility of the speaker and amplifier should be determined before any connection is made to the rear speakers. For any speaker type, an amplifier’s power rating must be greater than that of the speakers in a vehicle door.

Tip on amp storage

The amplifier may be stowed away in the trunk or tucked under the seat. In order to avoid overheating, it is essential that it be not crammed into an area that is too small. Your door speakers’ cable length should also be taken into consideration.

Tip on amp storage

Wiring Door Speakers to an Amp

Following the acquisition of a suitable amplifier, you must check that it is wired appropriately to avoid any malfunctions. All of the components needed to install an amplifier are offered separately.

As a result, automobile owners will have to buy them individually. It’s better to buy an amplifier wiring kit than to buy each component separately since kits include all the necessary components. Wires such as power, ground, RCA, fuse, and speaker wires are all included here.

The next step is to pick where to put the amplifier on the wall. It is imperative that you adhere to the manufacturer’s installation guidelines. No matter where you put the amplifier, there should be plenty of room to work around it.

It’s for two reasons. The wiring may be accommodated if there is adequate room. In addition, the amplifier produces heat while it is in use. If the amplifier is installed in a crowded area, it will overheat and get damaged.

The size of the amplifier will also have an impact on where it should be installed. When it comes to the number of accessories, for example, wire lengths, the location of the amplifier will play a role.

The amplifier should be firmly attached to the wall in order to prevent it from falling and creating an accident. Installing an amp at a specified distance from the head unit is also recommended by manufacturers.

If you’ve learned what an amp is, what it can do, and how it can benefit your car’s sound system, now is the time to get one.

Also read: Boss Katana 50 Vs 100 – Amplifier


Do Door Speakers Sound Better With an Amp?

Definitely. Well, they wouldn’t have much of a sound otherwise. You can find some types of active door speakers that have amps built-in, and in this case, an external amplifier would probably sound better. Active speakers (the types with built-in amps) do have to compromise on other areas of the design to allow the internal amplification. Having an external amplifier provides greater control over the overall sound and more power. 

Can I install door speakers without an amp?

You can, although it won’t sound as good. You can wire door speakers up to the stock stereo of your car, although they may lack the right level of power to get the full volume. If you only upgrade your speakers and not the amp, you won’t get a full improvement of your sound system.