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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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Polk Audio DB6502 DB+ 6.5" 600 Watt Car Speakers with Free 6" x 9" Adapters

600W Peak (200W RMS) 6.5" DB+ Series 2-way Component Speakers with 6" x 9" Speaker Adapters

82-6901,DB6502 big
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Polk Audio DB6502 DB+ 6.5" 600 Watt Car Speakers with Free 6" x 9" Adapters

600W Peak (200W RMS) 6.5" DB+ Series 2-way Component Speakers with 6" x 9" Speaker Adapters

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 1.77"
• IP65 rated
•5 1/4" / 6-1/2 Component/Coaxial Speaker to 6" x 9" Adapter

Save 15% Off Package Deals at Checkout!
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Install kits available for most vehicles

No Fit Icon Doesn't fit your Diplomat

47
List price $232.98
-9% $211.66 /pair

In stock

Add to Cart

(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 5.25" Speakers

(2) 600W 6.5" 2-Way + (2) 450W 5.25" 2-Way Coaxial Package

46CSC54,MM652 big
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(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 5.25" Speakers

(2) 600W 6.5" 2-Way + (2) 450W 5.25" 2-Way Coaxial Package

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
14
List price $368.99
-40% $221.96

In stock

Only 1 Left!

Add to Cart

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Lowest price in 30 days

(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 6.5" Speakers

2 Pairs (4 Total) 600W Peak (200W RMS) 2-Way Coaxial Package

46CSC654,MM652 big
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(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 6.5" Speakers

2 Pairs (4 Total) 600W Peak (200W RMS) 2-Way Coaxial Package

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
133
List price $368.99
-37% $231.95

In stock

Only 1 Left!

Add to Cart

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Polk DB402 4-Inch 135W 2-Way Speakers w/ Kicker 6x9-Inch 360W Coaxial Speakers

270W Peak (90W RMS) 4" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

43DSC69304,DB402 big
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Polk DB402 4-Inch 135W 2-Way Speakers w/ Kicker 6x9-Inch 360W Coaxial Speakers

270W Peak (90W RMS) 4" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

shipping truck icon Free shipping in USA. Provide zip for delivery date.

No Fit Icon Doesn't fit your Diplomat

68
List price $239.98
-32% $163.57

In stock

Add to Cart

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

Polk Audio DB402 + Kicker DSC6504

Bundle: 4" 135W 2-way Speakers w/ 6.5" 100W 2-way Speakers

43DSC6504,DB402 big
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Polk Audio DB402 + Kicker DSC6504

Bundle: 4" 135W 2-way Speakers w/ 6.5" 100W 2-way Speakers

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

shipping truck icon Free shipping in USA. Provide zip for delivery date.

No Fit Icon Doesn't fit your Diplomat

63
List price $194.98
-30% $136.96

In stock

Add to Cart

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

Polk Audio 150W Coaxial Speakers with Kicker 225W Coaxial Car Audio Speakers

Polk Audio 150W Coaxial Speakers with Kicker 225W Coaxial Car Audio Speakers

46CSC54,DB462 big
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Polk Audio 150W Coaxial Speakers with Kicker 225W Coaxial Car Audio Speakers

Polk Audio 150W Coaxial Speakers with Kicker 225W Coaxial Car Audio Speakers

• 150 Watts Max Each, 50 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.81"
• IP65 rated

shipping truck icon Free shipping in USA. Provide zip for delivery date.

No Fit Icon Doesn't fit your Diplomat

22
List price $219.98
-39% $133.96

In stock

Only 1 Left!

Add to Cart

• 150 Watts Max Each, 50 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.81"
• IP65 rated

Polk DB402 4-Inch 135W 2-Way w/ Rockford Fosgate 6x9-Inch 130W 2-Way Speakers

270W Peak (90W RMS) 4" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

R169X2,DB402 big
Go to item page Right Arrow Icon of Right Arrow

Polk DB402 4-Inch 135W 2-Way w/ Rockford Fosgate 6x9-Inch 130W 2-Way Speakers

270W Peak (90W RMS) 4" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

shipping truck icon Free shipping in USA. Provide zip for delivery date.

No Fit Icon Doesn't fit your Diplomat

84
List price $199.98
-20% $159.99

In stock

Add to Cart

• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

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