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DS18 PRO-X4.4BMSL (Sold Individually)

200W Peak (100W RMS) 4" PRO-X Series 8-ohm Shallow-mount Mid-range Speaker

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200W Peak (100W RMS) 4" PRO-X Series 8-ohm Shallow-mount Mid-range Speaker

• 200 watts Peak Each, 100 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
$39.95

In stock.

American Bass NEO-10-MR (Sold Individually)

450W Peak (225W RMS) 10" NEO Series Midrange 4-ohm Speaker

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450W Peak (225W RMS) 10" NEO Series Midrange 4-ohm Speaker

• Peak Power: 450 watts
• RMS Power: 225 watts
• Fiber Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98.3 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $207.00
-21% $164.35

In stock.

DS18 10XL1000N-8

1000W Peak (500W RMS) 10" XL Series Midrange 8-ohm Speakers

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1000W Peak (500W RMS) 10" XL Series Midrange 8-ohm Speakers

• 1000 watts Peak Each, 500 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 101 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $403.99
-17% $335.95

In stock.

DS18 PRO-NEO10R

1000W Peak (500W RMS) 10" PRO-NEO Series 4-Ohm Midrange Loudspeaker

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1000W Peak (500W RMS) 10" PRO-NEO Series 4-Ohm Midrange Loudspeaker

• 1000 watts Peak Each, 500 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
$239.95

Available

Ships in 10-14 days

DS18 10XL1400-8 (Sold Individually)

1400W Peak (700W RMS) 10" XL Series Midrange 8-ohm Loudspeaker

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1400W Peak (700W RMS) 10" XL Series Midrange 8-ohm Loudspeaker

• 1400 watts Peak, 700 watts RMS
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 98 dB

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VIP Product Get $24.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $287.99
-17% $239.95

In stock.

PRV Audio 4MR60-NDY-4

120W Peak (60W RMS) 4" MR Series Pro Audio Midrange 4-ohm Car Speaker (Sold Individually)

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120W Peak (60W RMS) 4" MR Series Pro Audio Midrange 4-ohm Car Speaker (Sold Individually)

• 120 watts Peak Each, 60 watts RMS Each
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $49.89
-20% $39.91

Available

Ships in 10-14 days

DS18 10XL1400-4 (Sold Individually)

1400W Peak (700W RMS) 10" XL Series Midrange 4-ohm Loudspeaker

10XL1400-4 big
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1400W Peak (700W RMS) 10" XL Series Midrange 4-ohm Loudspeaker

• 1400 watts Peak, 700 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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VIP Product Get $24.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $287.99
-17% $239.95

In stock

Only 1 Left!

DS18 10XL1400MB-4 (Sold Individually)

1400W Peak (700W RMS) 10" XL Series Mid-Bass 4-ohm Loudspeaker

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1400W Peak (700W RMS) 10" XL Series Mid-Bass 4-ohm Loudspeaker

• 1400 watts Peak, 700 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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VIP Product Get $24.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $287.99
-17% $239.95

Available

Ships in 10-14 days

DS18 10XL1400MB-8 (Sold Individually)

1400W Peak (700W RMS) 10" XL Series Mid-Bass 8-ohm Loudspeaker

10XL1400MB-8 big
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1400W Peak (700W RMS) 10" XL Series Mid-Bass 8-ohm Loudspeaker

• 1400 watts Peak, 700 watts RMS
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 98 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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VIP Product Get $24.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $287.99
-17% $239.95

In stock.

Limited time!

DS18 PRO-NEO10SLIM (Sold Individually)

500W Peak (250W RMS) 10" PRO Series Pro Audio Midrange 4-ohm Shallow Loudspeaker

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500W Peak (250W RMS) 10" PRO Series Pro Audio Midrange 4-ohm Shallow Loudspeaker

• 500 watts Peak, 250 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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VIP Product Get $21.60 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
$215.95

In stock

Only 2 Left!

American Bass GF-10-MR (Sold Individually)

2000W Peak (1000W RMS) 10" Godfather Series 4-ohm Shallow-mount Midrange Speakers

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2000W Peak (1000W RMS) 10" Godfather Series 4-ohm Shallow-mount Midrange Speakers

• 1000 watts Peak Each, 500 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 98 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $116.16
-18% $94.81

In stock.

DS18 PRO-X4M (Sold Individually)

200W Peak (100W RMS) 4" PRO-X Series 8-ohm Mid-range Speaker

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200W Peak (100W RMS) 4" PRO-X Series 8-ohm Mid-range Speaker

• 200 watts Peak Each, 100 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 85.7 dB

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
$37.95

In stock.

Massive Audio M10V2 (Sold Individually)

300W Peak (150W RMS) 10" M Series 8-ohm Mid-Range Speaker

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300W Peak (150W RMS) 10" M Series 8-ohm Mid-Range Speaker

• 300 watts Peak Each, 150 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 95 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $69.99
-21% $54.99

Available

Ships in 10-14 days

DS18 PRO-HY10.4B

700W Peak (350W RMS) 10" PRO-HY Series 4-ohm Mid-range Speaker with Built-in Driver

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700W Peak (350W RMS) 10" PRO-HY Series 4-ohm Mid-range Speaker with Built-in Driver

• 700 watts Peak Each, 350 watts RMS Each
• Water Resistance Paper cone material
• Impedance: 4 ohm
• Sensitivity: 100 dB

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VIP Product Get $27.60 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
$275.95

In stock.

• 700 watts Peak Each, 350 watts RMS Each
• Water Resistance Paper cone material
• Impedance: 4 ohm
• Sensitivity: 100 dB

Earthquake Sound EQ1000NEO (Sold Individually)

700W Peak (350W RMS) 10" EQ NEO Series Pro Audio Midrange 8-ohm Car and PA Speaker

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700W Peak (350W RMS) 10" EQ NEO Series Pro Audio Midrange 8-ohm Car and PA Speaker

• 700 watts Peak, 350 watts RMS
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97 dB

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VIP Product Get $27.50 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your GS400
$275.00

In stock.

Rockford Fosgate Punch Pro PPS4-10 (Sold Individually) (Like New (Open Box))

700W Peak (350W RMS) 10" Punch Pro Series Pro Audio Speaker

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700W Peak (350W RMS) 10" Punch Pro Series Pro Audio Speaker

• 700 watts Peak Each, 350 watts RMS Each
• Fiber-Reinforced High Strength Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

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Install kits available for most vehicles

found car based on your search
Fits your GS400
List price $249.99
-15% $212.49

In stock

Only 1 Left!

NVX NSP4 - Open Box, Great

300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters

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300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 1.88"

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
3
List price $49.99
-44% $27.99 /pair

In stock

Only 2 Left!

JBL Stage3 427F (STAGE3427FAM) (Open Box, Great)

300W Peak (60W RMS) 4" Stage3 Series 2-way Coaxial 3-ohm Speakers

Stage3 427F big
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300W Peak (60W RMS) 4" Stage3 Series 2-way Coaxial 3-ohm Speakers

• 150 watts Peak Each, 30 watts RMS Each
• Edge-driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 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 multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $89.95
-46% $48.97 /pair

In stock

Only 1 Left!

NVX VSP4 - Open Box, Great

450W Peak (150W RMS) 4" V-Series 2-Way Coaxial Car Speakers with Silk Dome Tweeters

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450W Peak (150W RMS) 4" V-Series 2-Way Coaxial Car Speakers with Silk Dome Tweeters

• 225 watts Peak Each, 75 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

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 multiple locations in your GS400
  • Lower Front Door
  • Rear Door
1
List price $71.99
-47% $38.49 /pair

In stock

Only 2 Left!

Rockford Fosgate Prime R14X2 (Open Box, Great)

120W Peak (60W RMS) 4” Prime Series 2-way 4-ohm Coaxial Car Speaker

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120W Peak (60W RMS) 4” Prime Series 2-way 4-ohm Coaxial Car Speaker

• 60 watts Peak Each, 30 watts RMS Each
• 1/2" Silk Dome tweeters
• Vacuum 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 multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $59.99
-30% $41.99 /pair

In stock

Only 1 Left!

• 60 watts Peak Each, 30 watts RMS Each
• 1/2" Silk Dome tweeters
• Vacuum polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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    FAQ for Speakers in 1999 GS400

    Q: Can I upgrade or change the Speakers in 1999 Lexus GS400?

    A: Yes this page includes all the best Speakers that work in your GS400.

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

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