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1981 BMW 733i

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Overview Upgrade your Stereo Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Speakers & Speaker Installation for 1981 BMW 733i

Find speakers to upgrade your sound and fit in the factory speaker location for your 733i.  After you choose your speakers, we'll help you find speaker adapters, speaker harnesses and other accessories for installation.

All car speakers

Shop All Speaker Locations in the Vehicle

See all speakers that fit, regardless of location.

Kick Panel

Kick Panel Speakers

Speakers for your kick panel.

Rear Deck Corner

Rear Deck Corner Speakers

Speakers for your corner rear deck

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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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Limited time!

Kenwood KFC-4675C

120W Peak (40W RMS) 4x6" 2 Way Coaxial 4-ohm Car Speakers

KFC-4675C big
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Kenwood KFC-4675C

120W Peak (40W RMS) 4x6" 2 Way Coaxial 4-ohm Car Speakers

• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Free Speaker Accessory at Checkout!
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 733i
  • Kick Panel
16
List price $128.00
Save $51.00
-40% $77.00 /pair

In stock

Add to Cart
Like New from: $66.30
See all 8 special offers

Kenwood KFC-4675C (Like New (Open Box))

120W Peak (40W RMS) 4x6" 2 Way Coaxial 4-ohm Car Speakers

KFC-4675C big
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Kenwood KFC-4675C (Like New (Open Box))

120W Peak (40W RMS) 4x6" 2 Way Coaxial 4-ohm Car Speakers

• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Kick Panel
List price $128.00
-48% $66.30 /pair

In stock

Only 1 Left!

Add to Cart

• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Limited time!

Kenwood KFC-1366S

520W Peak (60W RMS) 5.25" Sport Series 2 Way Coaxial 4-ohm Car Speakers

KFC-1366S big
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Kenwood KFC-1366S

520W Peak (60W RMS) 5.25" Sport Series 2 Way Coaxial 4-ohm Car Speakers

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
3
List price $80.00
Save 39%
-39% $49.00 /pair

In stock

Add to Cart
See all 12 special offers
Limited time!

Kenwood eXcelon KFC-X135

320W Peak (80W RMS) 5.25" eXcelon Series 2 Way Coaxial 4-ohm Car Speakers

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Kenwood eXcelon KFC-X135

320W Peak (80W RMS) 5.25" eXcelon Series 2 Way Coaxial 4-ohm Car Speakers

• 160 watts Peak Each, 40 watts RMS Each
• 1" Soft Dome Tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
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VIP Product Get $11.15 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
List price $180.00
Save $68.50
-38% $111.50 /pair

In stock

Only 2 Left!

Add to Cart
See all 12 special offers

Kenwood KFC-1398RS

660W Peak (150W RMS) 5.25" RS Series 2-Way Coaxial 4-ohm Car Speakers

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Kenwood KFC-1398RS

660W Peak (150W RMS) 5.25" RS Series 2-Way Coaxial 4-ohm Car Speakers

• 330 watts Peak Each, 75 watts RMS Each
• 1" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
List price $130.00
-16% $109.00 /pair

In stock

Add to Cart
See all 12 special offers
Limited time!

Kenwood eXcelon KFC-X463C

200W Peak (60W RMS) 4x6" eXcelon Series 2-Way 3-ohm Coaxial Car Speakers

KFC-X463C big
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Kenwood eXcelon KFC-X463C

200W Peak (60W RMS) 4x6" eXcelon Series 2-Way 3-ohm Coaxial Car Speakers

• 100 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Carbon-Polypropylene Hybrid cone material with diamond array pattern
• Impedance: 3 ohm
• Sensitivity: 86 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $12.00 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 733i
  • Kick Panel
4
List price $120.00
$119.99 /pair

Available

Ships in 10-14 days

Add to Cart
See all 8 special offers

Kenwood KFC-C1356S

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

KFC-C1356S big
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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

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
List price $60.00
-42% $34.99 /pair

Available

Ships in 10-14 days

Add to Cart
See all 12 special offers

Kenwood KFC-1366S with Sound Damping

520W Peak (60W RMS) 5.25" Sport Series 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

KFC1366S_SDBSK2 big
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Kenwood KFC-1366S with Sound Damping

520W Peak (60W RMS) 5.25" Sport Series 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 733i
50
List price $98.74
-40% $59.49

In stock

Add to Cart

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Kenwood KFC-4675C with Installation Accessories

120W Peak (40W RMS) 4x6” 2-Way Car Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

KFC-4675C, FRING46, SDSK2, SDRLR1, BTK106 big
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Kenwood KFC-4675C with Installation Accessories

120W Peak (40W RMS) 4x6” 2-Way Car Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 60 watts Peak Each, 20 watts RMS Each
• 1" Polypropylene Balanced Dome Tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Kick Panel
156
List price $200.71
-44% $112.66 /pair

In stock

Add to Cart

• 60 watts Peak Each, 20 watts RMS Each
• 1" Polypropylene Balanced Dome Tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Kenwood KFC-1366S with Installation Accessories

60W RMS5.25" 2-Way Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

KFC-1366S, XBAF525, SDSK2, SDRLR1, BTK106 big
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Kenwood KFC-1366S with Installation Accessories

60W RMS5.25" 2-Way Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
151
List price $152.71
-42% $88.86 /pair

In stock

Add to Cart

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Kenwood KFC-4675C with Sound Damping

60W Peak (20W RMS) 4x6” 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

KFC4675C_SDBSK2 big
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Kenwood KFC-4675C with Sound Damping

60W Peak (20W RMS) 4x6” 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 733i
63
List price $146.74
-40% $87.49

In stock

Add to Cart

• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Kenwood eXcelon KFC-X463C with Sound Damping

200W Peak (60W RMS) 4x6" 2-way 3-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

KFCX463C_SDBSK2 big
Go to item page Right Arrow Icon of Right Arrow

Kenwood eXcelon KFC-X463C with Sound Damping

200W Peak (60W RMS) 4x6" 2-way 3-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

• 100 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Carbon-Polypropylene Hybrid cone material with diamond array pattern
• Impedance: 3 ohm
• Sensitivity: 86 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 733i
51
List price $138.74
-6% $130.48

Available

Ships in 10-14 days

Add to Cart

• 100 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Carbon-Polypropylene Hybrid cone material with diamond array pattern
• Impedance: 3 ohm
• Sensitivity: 86 dB

Kenwood KFC-C1356S with Sound Damping

520W Peak (60W RMS) 5.25" 2-way 4-ohm Dual Cone Car Speakers + NVX SDBSK2 Premium Sound Damping

KFCC1356S_SDBSK2 big
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Kenwood KFC-C1356S with Sound Damping

520W Peak (60W RMS) 5.25" 2-way 4-ohm Dual Cone Car Speakers + NVX SDBSK2 Premium Sound Damping

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

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 733i
47
List price $78.74
-42% $45.48

Available

Ships in 10-14 days

Add to Cart

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

Kenwood eXcelon KFC-X463C with Installation Accessories

200W Peak (60W RMS) 4" x 6" 2-Way Coaxial Car Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

KFC-X463C, FRING46, SDSK2, SDRLR1, BTK106 big
Go to item page Right Arrow Icon of Right Arrow

Kenwood eXcelon KFC-X463C with Installation Accessories

200W Peak (60W RMS) 4" x 6" 2-Way Coaxial Car Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 4" x 6" 2-way Car Speakers
• 100W Max
• 30W RMS
• Carbon-Polypropylene Cone Woofer
• Butyl Rubber Surround
• 1" PEI Dome Tweeter
• 3 ohm Impedance
• Top-Mount Depth: 1-7/8"

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Kick Panel
144
List price $192.71
-19% $155.82 /pair

Available

Ships in 10-14 days

Add to Cart

• 4" x 6" 2-way Car Speakers
• 100W Max
• 30W RMS
• Carbon-Polypropylene Cone Woofer
• Butyl Rubber Surround
• 1" PEI Dome Tweeter
• 3 ohm Impedance
• Top-Mount Depth: 1-7/8"

Kenwood eXcelon KFC-X463C (2-Pairs, 4-Total)

400W Peak (120W RMS) 4x6" 2-Way Coaxial Car Speakers (2-Pairs)

KFCX463C_2 big
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Kenwood eXcelon KFC-X463C (2-Pairs, 4-Total)

400W Peak (120W RMS) 4x6" 2-Way Coaxial Car Speakers (2-Pairs)

• 4x6" 2-way Car Speakers
• 100W Max
• 30W RMS
• Carbon-Polypropylene Cone Woofer
• Butyl Rubber Surround
• 1" PEI Dome Tweeter
• 3 ohm Impedance
• Top-Mount Depth: 1-7/8"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 733i
4
List price $240.00
$239.98

Available

Ships in 10-14 days

Add to Cart

• 4x6" 2-way Car Speakers
• 100W Max
• 30W RMS
• Carbon-Polypropylene Cone Woofer
• Butyl Rubber Surround
• 1" PEI Dome Tweeter
• 3 ohm Impedance
• Top-Mount Depth: 1-7/8"

 
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    FAQ for Speakers in 1981 733i

    Q: Can I upgrade or change the Speakers in 1981 BMW 733i?

    A: Yes this page includes all the best Speakers that work in your 733i.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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