Upgrading your car’s sound system is one of the most satisfying improvements you can make. Whether you simply want to replace the blown factory speakers, you’re looking for crystal-clear sound quality, or you want powerful volume that can be heard from far away, this guide will help you choose exactly what you need, without technical hassles.

1. What is the goal of the upgrade?

Before you start choosing filters, think about exactly what you want to achieve:

Simple replacement of factory / blown speakers:

Do you just want to hear music clearly again without modifications or extra costs? Look for Coaxial speakers in 4 Ohm or 3 Ohm with power up to 100 Watt RMS.

Upgrade to crystal-clear & high-quality sound:

Do you want crystal-clear separation of frequencies and an improved soundstage inside the car? Choose Component speakers, where the woofer is installed in the door and the tweeter high on the dashboard or pillar.

High volume & powerful vocals (SPL):

Is your goal very loud sound that remains clear even with the windows open? Head to the Midrange speakers category, which are usually paired with an external amplifier.

2. Dimensions & Shape: How will they fit in your car?

Before you buy, you need to know the dimensions of the opening in your car.

Round Speakers

• 3" (8 cm): Small speakers, mainly installed on the dashboard or pillars.
• 4" (10 cm) & 5.25" (13 cm): Common sizes for small cars or rear doors.
• 6.5" (16.5 cm): The #1 most popular size. Fits the front doors of the majority of cars.
• 8" (20 cm) & 10" (25 cm): Large speakers for powerful bass or for SPL / Midrange builds.

Oval Speakers

• 6x9": The most popular choice for the rear shelf (parcel shelf), offering full sound and strong bass without needing a subwoofer.
• 4x6" & 5x7": Special shapes for specific car models.

3. Coaxial vs Component (What’s the difference?)

Coaxial (Coaxial)

What it is: The tweeter is built into the center of the main speaker.

Advantage: They are super easy to install (“plug & play”) directly into the factory door opening.

Who it’s for: For anyone who wants a quick, affordable, and easy upgrade.

Component (Component)

What it is: The set consists of separate parts (separate woofer for the door, separate tweeter, and crossover).

Advantage: The tweeter is mounted high up (on the dashboard or pillar), bringing voices and highs to ear level for a top-tier soundstage.

Who it’s for: For those seeking the ultimate sound quality and fidelity.

4. What type of speaker do you need?

• 2-Way (Bass & Treble together): Covers the basic frequencies. Ideal for everyday use.
• 3-Way & 4-Way (Full sound range): Better separates frequencies into bass, midrange, and treble for a more detailed sound.
• Midrange (Focus on vocals): Specialized high-output speakers that reproduce vocals only.
• Woofer / Midbass (Focus on bass): Specialized speakers for low frequencies and deep, full bass.

5. Resistance (Ohm): Where will you connect the speakers?

Resistance (Ohm) determines how much current the speaker draws from your source.

• 4 Ohm (Direct connection to the radio): The standard, safe choice for 90% of cars. They connect directly to the factory screen or the radio.
• 3 Ohm (Powerful sound without an amplifier): They draw a little more power from the basic radio, offering noticeably higher volume without buying an external amplifier.
• 2 Ohm (Only with an external amplifier): Intended exclusively for connection to an external amplifier. (If connected to a basic radio, there is a risk of overheating).
• 8 Ohm (For custom installations): Mainly used in professional Midrange speakers or in special connections with multiple speakers together.

6. Power: How many RMS Watts do you really need?

Watch out for Watts!

Always look at the RMS Watts (actual power), not the Max/Peak Watts that are often listed on the packaging.

• Up to 100 RMS Watts: Ideal for direct connection to the car radio / head unit (which usually outputs 15-20W RMS per channel).
• 100 - 200 RMS Watts: Require a small external amplifier to perform at 100% of their capabilities.
• 200+ RMS Watts: For powerful systems with large amplifiers and high volume demands.

Frequently Asked Questions (FAQ)

1. How do I find out what speaker size my car uses?

You can consult your vehicle’s manual, look up your model in online fitment guides, or measure the diameter of the factory grille/mount in the door.

2. Does the price of the speakers refer to one piece or a pair?

Coaxial and component speakers are almost always sold as a Pair (2 pieces). Professional Midrange, Woofers, and Subwoofers are often sold per Piece (1 piece). Check the “Packaging” filter on the page.

3. Do I absolutely need an amplifier to replace my speakers?

No! If you choose 4 Ohm or 3 Ohm speakers with power up to 100W RMS, they will work excellently directly from your factory head unit or car radio.