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  1. Home
  2. Car Audio & Electronics
  3. Car Speakers
  4. 5.25" Speakers

5.25" Speakers for your 2006 325Ci close

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Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
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Kenwood KFC-C1356S

520W Peak (60W RMS) 5.25" 2-way 4-ohm Dual Cone Car Speakers

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Kenwood KFC-C1356S

520W Peak (60W RMS) 5.25" 2-way 4-ohm Dual Cone Car Speakers

• 260 watts Peak Each, 30 watts RMS Each
• Cone tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Install kits available for most vehicles

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List price $60.00
-42% $34.99 /pair

Available

Ships in 10-14 days

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Limited time!

Kicker CSC5 (46CSC54) (Like New (Open Box))

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

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Kicker CSC5 (46CSC54) (Like New (Open Box))

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

10% Off Open Box!
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Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
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List price $119.99
-29% $84.99 /pair
$76.49 with coupon | Price details

In stock

Only 2 Left!

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• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

NVX - Worth the Envy - Direct to Consumer Car Audio
Limited time!

Kicker CSC5 (46CSC54) (Open Box, Great)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

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Kicker CSC5 (46CSC54) (Open Box, Great)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
Add vehicle details to confirm exact location.
List price $119.99
-42% $69.99 /pair
$62.99 with coupon | Price details

In stock

Add to Cart

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Limited time!

NVX NSP525 - Open Box, Great

240W Peak (160W RMS) 5.25" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters

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NVX NSP525 - Open Box, Great

240W Peak (160W RMS) 5.25" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 1.96"

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
Add vehicle details to confirm exact location.
List price $71.99
-31% $49.99 /pair
$44.99 with coupon | Price details

In stock

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JVC CS-DR520

520W Peak (80W RMS) 5.25” 2-Way Factory Upgrade Coaxial Speakers - Pair

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JVC CS-DR520

520W Peak (80W RMS) 5.25” 2-Way Factory Upgrade Coaxial Speakers - Pair

• 260 Watts Max Each, 40 Watts RMS Each
• Poly-Ether Imide Balanced Tweeter
• Carbon Mica Woofer Cone
• 4 Ohm Impedance
• Frequency Response: 85-25,000 Hz

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
Add vehicle details to confirm exact location.
List price $119.00
-17% $99.00 /pair

In stock

Only 2 Left!

Add to Cart
Lowest price in 30 days

NVX NSP525

240W Peak (160W RMS) 5.25" N-Series 2 Way Coaxial Car Speakers

NSP525 big
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NVX NSP525

240W Peak (160W RMS) 5.25" N-Series 2 Way Coaxial Car Speakers

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 1.96"

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
Add vehicle details to confirm exact location.
27
List price $65.99
-17% $54.99 /pair

In stock

Add to Cart
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Available Offers (2) for NVX NSP525
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Prime Time! Save 25% at Checkout!
List price $65.99
-17% $54.99
$41.24 with coupon | Price details
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2026-06-28 23:59:00
Purchase $400 or More of NVX and Save 15%!
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2026-07-27 11:08:20
Used from: $49.99
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Limited time!

Alpine S2-S50

340W Peak (110W RMS) 5.25" S-Series Hi-Res 2-Way Coaxial 4-ohm Car Speakers

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Alpine S2-S50

340W Peak (110W RMS) 5.25" S-Series Hi-Res 2-Way Coaxial 4-ohm Car Speakers

• 170 watts Peak Each, 55 watts RMS Each
• Hi-Res Audio Certified
• 3/4" Cloth Soft Dome tweeters
• Polypropylene, Glass Fiber and Mica cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

Free Speaker Accessory at Checkout!
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Install kits available for most vehicles

additional information required
Fits select locations in your 325Ci.
Add vehicle details to confirm exact location.
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List price $160.00
-19% $129.95 /pair
Add to Cart

• 170 watts Peak Each, 55 watts RMS Each
• Hi-Res Audio Certified
• 3/4" Cloth Soft Dome tweeters
• Polypropylene, Glass Fiber and Mica cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

NVX - Worth the Envy - Direct to Consumer Car Audio
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