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1981 BMW 633CSi

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Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

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

Universal-Fit Audio for 1981 BMW 633CSi

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

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Price Range
Diaphragm Material
Mounting Type (Compression Drivers)
Throat Size
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.
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Belva BSCT4 Tweeter (Sold Individually)

4-inch Pro Car Audio Tweeter

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Belva BSCT4 Tweeter (Sold Individually)

4-inch Pro Car Audio Tweeter

• 4-inch Pro Car Audio Tweeter (sold individually)
• Peak: 200W
• 1.75" Voice Coil
• Impedance: 4 Ohm

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List price $49.99
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• 4-inch Pro Car Audio Tweeter (sold individually)
• Peak: 200W
• 1.75" Voice Coil
• Impedance: 4 Ohm

DS18 PRO-DPL1PH

640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Phenolic Compression Driver

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DS18 PRO-DPL1PH

640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Phenolic Compression Driver

• 2" Throat compression driver
• Phenolic Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

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List price $71.99
-17% $59.95

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• 2" Throat compression driver
• Phenolic Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

Cerwin-Vega HEDPS1 (Sold Individually)

180W Peak (60W RMS) 1" HED Pro Series 4-ohm Pro Audio Super Bullet Tweeter

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Cerwin-Vega HEDPS1 (Sold Individually)

180W Peak (60W RMS) 1" HED Pro Series 4-ohm Pro Audio Super Bullet Tweeter

• 1" HED Pro Series Super Bullet Tweeter
• 180 watts Peak
• 60 watts RMS
• 4 ohm Impedance

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$43.99

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Cerwin Vega P75T

300W Peak (100W RMS) 1" Pro Series 8-ohm Pro Audio Horn Tweeters

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Cerwin Vega P75T

300W Peak (100W RMS) 1" Pro Series 8-ohm Pro Audio Horn Tweeters

• 1" Polyimide Horn Tweeters
• 150 watts Peak Each
• 50 watts RMS Each
• 8 ohm Impedance

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List price $263.99
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• 1" Polyimide Horn Tweeters
• 150 watts Peak Each
• 50 watts RMS Each
• 8 ohm Impedance

DS18 PRO-DN22PY.8

800W Peak (200W RMS) 2" Throat 8-ohm Bolt-On Compression Driver with Polyimide Voice Coil

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DS18 PRO-DN22PY.8

800W Peak (200W RMS) 2" Throat 8-ohm Bolt-On Compression Driver with Polyimide Voice Coil

• 2" Throat compression driver
• Polyimide Diaphragm Material
• 800 watts Peak, 200 watts RMS
• 8 ohm Impedance

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List price $287.99
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• 2" Throat compression driver
• Polyimide Diaphragm Material
• 800 watts Peak, 200 watts RMS
• 8 ohm Impedance

Diamond Audio M075T

200W Peak (100W RMS) 1" Motorsport Series 4-ohm Pro Audio Short Horn Tweeters

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Diamond Audio M075T

200W Peak (100W RMS) 1" Motorsport Series 4-ohm Pro Audio Short Horn Tweeters

• 1" Motorsport Series Pro-Audio Horn Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

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List price $279.99
$269.99

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• 1" Motorsport Series Pro-Audio Horn Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

DS18 PRO-DKH1XS

640W Peak (160W RMS) 2" Throat 8-ohm Aluminum Short Horn Compression Driver with Spacer

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DS18 PRO-DKH1XS

640W Peak (160W RMS) 2" Throat 8-ohm Aluminum Short Horn Compression Driver with Spacer

• 2" Throat compression driver with short horn and spacer
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

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List price $136.99
-17% $113.95

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• 2" Throat compression driver with short horn and spacer
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

DS18 NXL-T1

480W Peak (240W RMS) 3.8" Hydro Series Pro Audio 4-ohm Super Bullet Marine Tweeters

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DS18 NXL-T1

480W Peak (240W RMS) 3.8" Hydro Series Pro Audio 4-ohm Super Bullet Marine Tweeters

• 3.8" Hydro Series Water Resistant Pro Audio Bullet Tweeters
• 240 watts Peak Each
• 120 watts RMS Each
• 4 ohm Impedance

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$77.95

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• 3.8" Hydro Series Water Resistant Pro Audio Bullet Tweeters
• 240 watts Peak Each
• 120 watts RMS Each
• 4 ohm Impedance

DS18 PRO-D22TI.8

640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Titanium Compression Driver

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DS18 PRO-D22TI.8

640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Titanium Compression Driver

• 2" Throat compression driver
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

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List price $100.99
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• 2" Throat compression driver
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

DS18 PRO-TWX4 (Sold Individually)

560W Peak (280W RMS) 4.53" 4-ohm Pro Audio Super Bullet Tweeter

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DS18 PRO-TWX4 (Sold Individually)

560W Peak (280W RMS) 4.53" 4-ohm Pro Audio Super Bullet Tweeter

• 4.53" Titanium Super Bullet Tweeter
• 560 watts Peak Each
• 280 watts RMS Each
• 4 ohm Impedance

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$63.95

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• 4.53" Titanium Super Bullet Tweeter
• 560 watts Peak Each
• 280 watts RMS Each
• 4 ohm Impedance

Massive Audio CT4XV2 (Sold Individually)

120W Peak (30W RMS) 1” 4-ohm Pro Audio Power Bullet Tweeter

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Massive Audio CT4XV2 (Sold Individually)

120W Peak (30W RMS) 1” 4-ohm Pro Audio Power Bullet Tweeter

• 1" Titanium Pro Audio Power Bullet Tweeter
• 120 watts Peak Each
• 30 watts RMS Each
• 4 ohm Impedance

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List price $49.99
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• 1" Titanium Pro Audio Power Bullet Tweeter
• 120 watts Peak Each
• 30 watts RMS Each
• 4 ohm Impedance

PRV Audio WG270Ph

300W Peak (150W RMS) 1" Trio Series Pro Audio Square Compression Horn Driver

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PRV Audio WG270Ph

300W Peak (150W RMS) 1" Trio Series Pro Audio Square Compression Horn Driver

• 1" Trio Series Pro-Audio Compression Horn Driver
• 300 watts Peak Each
• 150 watts RMS Each
• 8 ohm Impedance

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List price $49.89
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• 1" Trio Series Pro-Audio Compression Horn Driver
• 300 watts Peak Each
• 150 watts RMS Each
• 8 ohm Impedance

DS18 PRO-TWN1 (Sold Individually)

240W Peak (60W RMS) 3" PRO-TWN Series 4-ohm Aluminum Slim Super Bullet Tweeter

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DS18 PRO-TWN1 (Sold Individually)

240W Peak (60W RMS) 3" PRO-TWN Series 4-ohm Aluminum Slim Super Bullet Tweeter

• 3" PRO-TWN 4-ohm Aluminum Slim Super Bullet Tweeter
• 240 watts Peak Each
• 120W Program Power each
• 60 watts RMS Each
• 4 ohm Impedance

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$40.95

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• 3" PRO-TWN 4-ohm Aluminum Slim Super Bullet Tweeter
• 240 watts Peak Each
• 120W Program Power each
• 60 watts RMS Each
• 4 ohm Impedance

DS18 PRO-TW750C-4/BK

400W Peak (150W RMS) 4" Pro Audio 4-ohm Super Bullet Tweeter (Black)

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DS18 PRO-TW750C-4/BK

400W Peak (150W RMS) 4" Pro Audio 4-ohm Super Bullet Tweeter (Black)

• 4" Titanium tweeter construction
• 400 watts Peak / 150 watts RMS
• 4 ohms impedance
• 1.5" KSV voice coil
• Body Color/Finish: Black

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• 4" Titanium tweeter construction
• 400 watts Peak / 150 watts RMS
• 4 ohms impedance
• 1.5" KSV voice coil
• Body Color/Finish: Black

DS18 PRO-DR1.75

600W Peak (300W RMS) 1” Throat 8-ohm Twist-on Compression Driver with Titanium Voice Coil

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DS18 PRO-DR1.75

600W Peak (300W RMS) 1” Throat 8-ohm Twist-on Compression Driver with Titanium Voice Coil

• 1" Throat compression driver
• Titanium Diaphragm Material
• 600 watts Peak, 300 watts RMS
• 8 ohm Impedance

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List price $56.99
-18% $46.95

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• 1" Throat compression driver
• Titanium Diaphragm Material
• 600 watts Peak, 300 watts RMS
• 8 ohm Impedance

DS18 PRO-TW5L (Sold Individually)

500W Peak (250W RMS) 4" x 5.35" PRO-TW Series 4-ohm Aluminum Super Bullet Tweeter with RGB LED Lights

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DS18 PRO-TW5L (Sold Individually)

500W Peak (250W RMS) 4" x 5.35" PRO-TW Series 4-ohm Aluminum Super Bullet Tweeter with RGB LED Lights

• 4" x 5.35" PRO-TW Series 4-ohm Aluminum Super Bullet Tweeter
• RGB LED illumination
• 500 watts Peak Each
• 250 watts RMS Each
• 4 ohm Impedance
• Sensitivity: 107 dB

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$38.95

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• 4" x 5.35" PRO-TW Series 4-ohm Aluminum Super Bullet Tweeter
• RGB LED illumination
• 500 watts Peak Each
• 250 watts RMS Each
• 4 ohm Impedance
• Sensitivity: 107 dB

DS18 PRO-DR1.35

400W Peak (200W RMS) 1” Throat 8-ohm Twist-on Compression Driver with Titanium Voice Coil

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DS18 PRO-DR1.35

400W Peak (200W RMS) 1” Throat 8-ohm Twist-on Compression Driver with Titanium Voice Coil

• 1" Throat compression driver
• Titanium Diaphragm Material
• 400 watts Peak, 200 watts RMS
• 8 ohm Impedance

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List price $47.99
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• 1" Throat compression driver
• Titanium Diaphragm Material
• 400 watts Peak, 200 watts RMS
• 8 ohm Impedance

DS18 PRO-DR1.354

320W Peak (80W RMS) 1” Throat 4-ohm Twist-on Compression Driver with Titanium Voice Coil

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DS18 PRO-DR1.354

320W Peak (80W RMS) 1” Throat 4-ohm Twist-on Compression Driver with Titanium Voice Coil

• 1" Throat compression driver
• Titanium Diaphragm Material
• 320 watts Peak, 80 watts RMS
• 4 ohm Impedance

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List price $47.99
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• 1" Throat compression driver
• Titanium Diaphragm Material
• 320 watts Peak, 80 watts RMS
• 4 ohm Impedance

Massive Audio PAT 220TI (Sold Individually)

350W Peak (75W RMS) 1-3/8" Exit PAT Series Screw On Pro Audio Compression Driver

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Massive Audio PAT 220TI (Sold Individually)

350W Peak (75W RMS) 1-3/8" Exit PAT Series Screw On Pro Audio Compression Driver

• 350W Max Each, 75W RMS Each
• Ferrofluid Cooled
• Field Replaceable Voice Coil
• 8 ohm Impedance
• Sensitivity: 110dB
• High Grade Ferrite Magnet

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List price $99.99
-30% $69.99

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• 350W Max Each, 75W RMS Each
• Ferrofluid Cooled
• Field Replaceable Voice Coil
• 8 ohm Impedance
• Sensitivity: 110dB
• High Grade Ferrite Magnet

DS18 PRO-TW750CN-8/BK (Sold Individually)

440W Peak (160W RMS) 4" PRO Series 8-ohm Pro Audio Super Bullet Tweeter

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DS18 PRO-TW750CN-8/BK (Sold Individually)

440W Peak (160W RMS) 4" PRO Series 8-ohm Pro Audio Super Bullet Tweeter

• 4" PRO Series Pro Audio Tweeter
• 440 watts Peak, 160 watts RMS
• 8 ohm impedance

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• 4" PRO Series Pro Audio Tweeter
• 440 watts Peak, 160 watts RMS
• 8 ohm impedance

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