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2) New Rockford Fosgate 6x9" 150 Watt 2 Way Car Coaxial Speakers Audio (4 Pack)

2) New Rockford Fosgate 6x9" 150 Watt 2 Way Car Coaxial Speakers Audio (4 Pack)

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2) New Rockford Fosgate 6x9" 150 Watt 2 Way Car Coaxial Speakers Audio (4 Pack)

• Peak Power: 300W
• RMS Power: 150W
• 3/4" Treated PEI Dome Tweeter
• Mounting Depth: 3" • Injection Molded Mineral Filled Polypropylene Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 91dB

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$439.96

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• Peak Power: 300W
• RMS Power: 150W
• 3/4" Treated PEI Dome Tweeter
• Mounting Depth: 3" • Injection Molded Mineral Filled Polypropylene Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 91dB

Alpine S2-S65 (2-Pairs, 4-Total)

960W Peak (320W RMS) 6.5" S-Series 2-way Coaxial Car Speakers (2-Pairs)

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960W Peak (320W RMS) 6.5" S-Series 2-way Coaxial Car Speakers (2-Pairs)

• 240 watts Peak Each, 80 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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5
List price $360.00
-17% $299.90

In stock

• 240 watts Peak Each, 80 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

NVX - Worth the Envy - Direct to Consumer Car Audio

Hertz X 165 (2-Pairs, 4-Total)

880W Peak (220W RMS) 6.5” Uno Series 2-way Coaxial Speakers (2-Pairs)

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880W Peak (220W RMS) 6.5” Uno Series 2-way Coaxial Speakers (2-Pairs)

• 220 watts Peak Each, 55 watts RMS Each
• 3/4" Neodymium Dome Tweeters
• Water Resistance Paper Cone cone material
• Impedance: 4 ohm
• Sensitivity: 93.5 dB

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1
List price $190.00
-16% $159.98

In stock

Only 1 Left!

• 220 watts Peak Each, 55 watts RMS Each
• 3/4" Neodymium Dome Tweeters
• Water Resistance Paper Cone cone material
• Impedance: 4 ohm
• Sensitivity: 93.5 dB

Hertz DCX100.3 (2-Pairs, 4-Total)

240W Peak (120W RMS) 4" Dieci Series 2-Way Coaxial Car Speakers (2-Pairs)

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240W Peak (120W RMS) 4" Dieci Series 2-Way Coaxial Car Speakers (2-Pairs)

• 30 Watts Max Each, 15 Watts RMS Each
• Water-repellent pressed paper cone material
• PEI dome tweeter
• 4 Ohm Impedance
• Sensitivity: 92 dB
• Mounting Depth: 1-3/4"

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List price $300.00
-13% $259.98

In stock

• 30 Watts Max Each, 15 Watts RMS Each
• Water-repellent pressed paper cone material
• PEI dome tweeter
• 4 Ohm Impedance
• Sensitivity: 92 dB
• Mounting Depth: 1-3/4"

Pioneer TS-A6901C (2-Pairs, 4-Total)

1800W Peak (400W RMS) 6x9" A-Series 2-Way Component Speaker System (2-Pairs)

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1800W Peak (400W RMS) 6x9" A-Series 2-Way Component Speaker System (2-Pairs)

• 450 watts Peak Each, 100 watts RMS Each
• 3/4" Polyetherimide Dome Tweeters
• Carbon and Mica Reinforced Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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List price $360.00
-17% $300.00

In stock

• 450 watts Peak Each, 100 watts RMS Each
• 3/4" Polyetherimide Dome Tweeters
• Carbon and Mica Reinforced Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

Pioneer TS-A653CH (2-Pairs, 4-Total)

1480W Peak (340W RMS) 6.5" A-Series 2-way Component Speaker System (2-Pairs)

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1480W Peak (340W RMS) 6.5" A-Series 2-way Component Speaker System (2-Pairs)

• 370 watts Peak Each, 85 watts RMS Each
• 3/4" PEI (Polyetherimide) Hard Dome Tweeters
• Aramid fiber reinforced Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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List price $360.00
-17% $299.98

In stock

Only 2 Left!

• 370 watts Peak Each, 85 watts RMS Each
• 3/4" PEI (Polyetherimide) Hard Dome Tweeters
• Aramid fiber reinforced Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

2) Kicker 43DSC69304 DSC6930 6x9 Car Speakers+2) 43DSC3504 DSC350 3.5" Speakers

(2) 720W 6x9" 3-Way + (2) 160W 3.5" 2-Way Coaxial Package

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(2) 720W 6x9" 3-Way + (2) 160W 3.5" 2-Way Coaxial Package

• 360 Watts Max Each, 90 Watts RMS Each
• Rigid polypropylene cone material
• UV-treated foam speaker surround
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 3.25"

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48
List price $204.98
-15% $174.98

In stock

• 360 Watts Max Each, 90 Watts RMS Each
• Rigid polypropylene cone material
• UV-treated foam speaker surround
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 3.25"

JBL CLUB 64CSQ (2-Pairs, 4-Total)

1140W Peak (380W RMS) 6.5" Club Series 2-way Component Speaker System (2-Pairs)

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1140W Peak (380W RMS) 6.5" Club Series 2-way Component Speaker System (2-Pairs)

• 285 watts Peak Each, 95 watts RMS Each
• 1-3/4" Silk Dome Tweeters
• Carbon Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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3
List price $599.90
-10% $539.90

In stock

Only 1 Left!

• 285 watts Peak Each, 95 watts RMS Each
• 1-3/4" Silk Dome Tweeters
• Carbon Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

DS18 PRO-ZXI694BM (Pair)

1200W Peak (600W RMS) 6x9” ZXi Series 4-Ohm Midrange Car Speakers (Pair)

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1200W Peak (600W RMS) 6x9” ZXi Series 4-Ohm Midrange Car Speakers (Pair)

• 600 watts Peak Each, 300 watts RMS Each
• Aluminum Bullet Tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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$199.90

In stock

Only 1 Left!

• 600 watts Peak Each, 300 watts RMS Each
• Aluminum Bullet Tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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(2) KICKER 43CSS654 6.5" 6-1/2" 1200 Watt 4-Ohm Car Audio Component Speaker Sets

600W Peak (200W RMS) 6.5" CSS 2-Way Component Car Speakers Package

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600W Peak (200W RMS) 6.5" CSS 2-Way Component Car Speakers Package

• Peak Power: 600W
• RMS Power: 200W
• (tweeter size 3/4", titanium dome tweeter
• Mounting Depth: 1-11/16"
• Polypropylene midwoofer cone

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9
List price $399.98
-28% $287.92

In stock

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• Peak Power: 600W
• RMS Power: 200W
• (tweeter size 3/4", titanium dome tweeter
• Mounting Depth: 1-11/16"
• Polypropylene midwoofer cone

Alpine SXE-6926S 2 Pairs (4 Total)

280W Peak (90W RMS) 6x9” SXE Series 2-Way Coaxial Speakers

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280W Peak (90W RMS) 6x9” SXE Series 2-Way Coaxial Speakers

• 140 watts Peak Each, 45 watts RMS Each
• Mylar Dome Tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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List price $143.98
-31% $99.16

In stock

• 140 watts Peak Each, 45 watts RMS Each
• Mylar Dome Tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

Hertz K 165 (2-Pairs, 4-Total)

600W Peak (150W RMS) 6.5" Uno Series 2-Way 4 ohm Component Speaker System (2-Pairs)

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600W Peak (150W RMS) 6.5" Uno Series 2-Way 4 ohm Component Speaker System (2-Pairs)

• 150 Watts Max Each, 35 Watts RMS Each
• Water-repellent pressed paper cone material
• PEI Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 93.5 dB

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4
List price $300.00
-33% $199.98

In stock

Only 1 Left!

• 150 Watts Max Each, 35 Watts RMS Each
• Water-repellent pressed paper cone material
• PEI Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 93.5 dB

Infinity Primus 603F (PR603F) (2-Pairs, 4-Total)

600W Peak (200W RMS) 6.5” Primus Series 2-Way Coaxial Speakers (2-Pairs)

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600W Peak (200W RMS) 6.5” Primus Series 2-Way Coaxial Speakers (2-Pairs)

• 150 watts Peak Each, 50 watts RMS Each
• 1/2" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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7
List price $219.90
-27% $159.90

In stock

• 150 watts Peak Each, 50 watts RMS Each
• 1/2" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Rockford Fosgate Power T1650 (2-Pairs, 4-Total)

600W Peak (300W RMS) 6.5" Power Series 2-way 4-ohm Coaxial Speakers (2-Pairs)

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600W Peak (300W RMS) 6.5" Power Series 2-way 4-ohm Coaxial Speakers (2-Pairs)

• 150 watts Peak Each, 75 watts RMS Each
• 1" Aluminum Dome Tweeters
• Injection molded Carbon Fiber filled polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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$439.98

In stock

• 150 watts Peak Each, 75 watts RMS Each
• 1" Aluminum Dome Tweeters
• Injection molded Carbon Fiber filled polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

JBL Stadium 62CF (2-Pairs, 4-Total)

1320W Peak (440W RMS) 6.5" Stadium Series 2-Way Component Speaker System (2-Pairs)

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1320W Peak (440W RMS) 6.5" Stadium Series 2-Way Component Speaker System (2-Pairs)

• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Aluminum Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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2
List price $959.90
-6% $899.90

In stock

Only 2 Left!

• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Aluminum Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Limited time!

NVX NSP35 (2-Pairs, 4-Total)

400W Peak (140W RMS) 3.5" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters (2-Pairs)

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400W Peak (140W RMS) 3.5" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters (2-Pairs)

• 100 watts Peak Each, 35 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB
• Mounting Depth: 1.49"

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55
List price $119.98
-17% $99.98

In stock

• 100 watts Peak Each, 35 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB
• Mounting Depth: 1.49"

Limited time!

NVX NSP65KIT (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6.5" N-Series 2-Way Component Speaker System with 20mm Silk Dome Tweeters (2-Pairs)

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1200W Peak (400W RMS) 6.5" N-Series 2-Way Component Speaker System with 20mm Silk Dome Tweeters (2-Pairs)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $215.98
-21% $170.98

In stock

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Limited time!

NVX XSP652 (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters (2-Pairs)

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1200W Peak (400W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters (2-Pairs)

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

Purchase $400 or More of NVX and Save 15%!
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19
List price $359.98
-37% $227.98

In stock

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

MTX TERMINATOR6 (2-Pairs, 4-Total)

360W Peak (180W RMS) 6.5" Terminator Series 2-Way Coaxial Car Speakers (2-Pairs)

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360W Peak (180W RMS) 6.5" Terminator Series 2-Way Coaxial Car Speakers (2-Pairs)

• 90 watts Peak Each, 45 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86.8 dB

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List price $139.90
-14% $119.90

In stock

• 90 watts Peak Each, 45 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86.8 dB

Alpine S2-S69C (2-Pairs, 4-Total)

1040W Peak (340W RMS) 6x9" S-Series 2-way Component Speaker System (2-Pairs)

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1040W Peak (340W RMS) 6x9" S-Series 2-way Component Speaker System (2-Pairs)

• 260 watts Peak Each, 85 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm

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4
List price $580.00
-17% $479.90

In stock

Only 2 Left!

• 260 watts Peak Each, 85 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm

NVX - Worth the Envy - Direct to Consumer Car Audio

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    FAQ for Speakers in 1981 4000

    Q: Can I upgrade or change the Speakers in 1981 Audi 4000?

    A: Yes this page includes all the best Speakers that work in your 4000.

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

    • You see only parts engineered for your exact vehicle
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.