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  5. Polk Audio All Car Speakers

All Polk Audio Car Speakers for your 1978 280Z close

Consistent, superior sound across all models with Polk Audio All Car Speakers.

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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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1978 280Z
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Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB652 big
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Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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Save $11 on install kits for this speaker

found car based on your search
Fits the following location in your 280Z
12
List price $119.99
-9% $109.00 /pair

In stock

Add to Cart
See all 14 special offers

Polk Audio DB402 (DB 402)

270W Peak (90W RMS) 4" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB402 big
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Polk Audio DB402 (DB 402)

270W Peak (90W RMS) 4" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 135 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

found car based on your search
Fits the following location in your 280Z
  • Far-Rear Side Panels
4
List price $99.99
-10% $90.00 /pair

In stock

Add to Cart
See all 8 special offers

Polk Audio DB6502 (DB 6502)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB6502 big
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB6502 (DB 6502)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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VIP Product Get $20.00 in rewards to spend later

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Install kits available for this speaker

found car based on your search
Fits the following location in your 280Z
8
List price $209.99
-5% $200.00 /set

In stock

Add to Cart
Like New from: $118.15
See all 14 special offers

Polk Audio MM692 (MM 692) (Open Box, Good)

900W Peak (300W RMS) 6x9" Mobile Monitor Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

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Polk Audio MM692 (MM 692) (Open Box, Good)

900W Peak (300W RMS) 6x9" Mobile Monitor Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 450 watts Peak Each, 150 watts RMS Each
• 1" and 3/4" dual Terylene Dome tweeters
• Titanium Coated Composite cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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

found car based on your search
Fits the following location in your 280Z
  • Rear Seat Side Panel
List price $245.99
-44% $137.40 /pair

In stock

Only 1 Left!

Add to Cart

• 450 watts Peak Each, 150 watts RMS Each
• 1" and 3/4" dual Terylene Dome tweeters
• Titanium Coated Composite cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

Polk Audio MM652 (MM 652)

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

MM652 big
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Polk Audio MM652 (MM 652)

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• IP56 marine certified, with weep holes for proper drainage
• 1" Terylene Dome pivoting tweeters
• Titanium Coated Composite cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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

VIP Product Get $17.90 in rewards to spend later

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Save $21 on install kits for this speaker

found car based on your search
Fits the following location in your 280Z
9
List price $249.00
-28% $179.00 /pair

In stock

Only 2 Left!

Add to Cart
See all 14 special offers

Polk Audio DB6502 (Like New (Open Box))

600W Peak (200W RMS) 6.5" DB+ Series 2-way 4-ohm Car and Marine Component Speaker System

DB6502 big
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB6502 (Like New (Open Box))

600W Peak (200W RMS) 6.5" DB+ Series 2-way 4-ohm Car and Marine Component Speaker System

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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

Install kits available for this speaker

found car based on your search
Fits the following location in your 280Z
List price $199.99
-41% $118.15 /set

In stock

Only 2 Left!

Add to Cart

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

Polk Audio DB692 (DB 692)

900W Peak (300W RMS) 6x9" DB+ Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB692 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB692 (DB 692)

900W Peak (300W RMS) 6x9" DB+ Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" dual Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

VIP Star Icon

VIP Product Get $13.90 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 280Z
  • Rear Seat Side Panel
15
List price $149.99
-7% $139.00 /pair
Notify Me

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" dual Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Polk Audio DB402 (DB 402) (Open Box, Great)

270W Peak (90W RMS) 4" DB+ Series 2-way 4-ohm Car & Marine Coaxial Speakers

DB402 big DISCONTINUED
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Polk Audio DB402 (DB 402) (Open Box, Great)

270W Peak (90W RMS) 4" DB+ Series 2-way 4-ohm Car & Marine Coaxial Speakers

• 135 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

found car based on your search
Fits the following location in your 280Z
  • Far-Rear Side Panels

• 135 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

 
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