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Soundstream RS.42

160W Peak (80W RMS) 4" Reserve Series 2-way 4-ohm Coaxial Car Speakers

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160W Peak (80W RMS) 4" Reserve Series 2-way 4-ohm Coaxial Car Speakers

• 80 watts Peak Each, 40 watts RMS Each
• 3/4" Woven Poly-nylon Synthetic Hemispherical tweeters
• Natural Pulp Fiber Cone with Mica Crystalline Additive cone material
• Impedance: 4 ohm
• Sensitivity: 84.3 dB

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $43.99
Save 32%
-32% $29.99 /pair

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Soundstream SM2P.104 (Sold Individually)

500W Peak (250W RMS) 10" Pro Audio 2-Way Coaxial 4-ohm Speaker

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500W Peak (250W RMS) 10" Pro Audio 2-Way Coaxial 4-ohm Speaker

• 500 watts Peak, 250 watts RMS
• 1-3/4" Horn Tweeter
• Kevlar Reinforced Pulp Paper cone material
• Impedance: 4 ohm
• Sensitivity: 99 dB

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Fits your GS400
1
List price $101.99
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-31% $69.99

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• 500 watts Peak, 250 watts RMS
• 1-3/4" Horn Tweeter
• Kevlar Reinforced Pulp Paper cone material
• Impedance: 4 ohm
• Sensitivity: 99 dB

Limited time!

DS18 PRO-X10.4M (Sold Individually)

600W Peak (300W RMS) 10" PRO-X Series 4-ohm Mid-range Speaker

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600W Peak (300W RMS) 10" PRO-X Series 4-ohm Mid-range Speaker

• 600 watts Peak Each, 300 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

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$89.95

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• 600 watts Peak Each, 300 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

Sundown Audio LCMR-10 v.2 (LCMR104)

120W RMS 10" LCMR Series Pro Audio Midrange 4-ohm Speaker (S-LCMRV2104)

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120W RMS 10" LCMR Series Pro Audio Midrange 4-ohm Speaker (S-LCMRV2104)

• 120 watts RMS
• Fiber-Reinforced High Strength Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96.1 dB

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Fits your GS400
List price $95.99
-17% $79.99

In stock

Sundown Audio LCMR-10 v.2 (LCMR108)

120W RMS 10" LCMR Series Pro Audio Midrange 8-ohm Speaker (S-LCMRV2108)

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120W RMS 10" LCMR Series Pro Audio Midrange 8-ohm Speaker (S-LCMRV2108)

• 120 watts RMS
• Fiber-Reinforced High Strength Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97.6 dB

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Fits your GS400
List price $95.99
-17% $79.99

In stock

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Alpine BRV-S40

240W Peak (80W RMS) 4" BassRev Series 4-ohm 2-Way Coaxial Speaker Set

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240W Peak (80W RMS) 4" BassRev Series 4-ohm 2-Way Coaxial Speaker Set

• 120 watts Peak Each, 40 watts RMS Each
• 1" Polyester cloth Dome Tweeters
• Polypropylene-Mica cone material
• BassRev tuning via Alpine OPTIM8
• Impedance: 4 ohm
• Sensitivity: 84 dB

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Install kits available for most vehicles

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $300.00
Save $100.05
-33% $199.95 /pair

In stock

PRV Audio 10W650A

650W Peak (325W RMS) 10" Alto Series Pro Audio Midbass 8-ohm Car Speaker

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650W Peak (325W RMS) 10" Alto Series Pro Audio Midbass 8-ohm Car Speaker

• 650 watts Peak Each, 325 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97 dB

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Fits your GS400
List price $97.39
-20% $77.91

In stock

• 650 watts Peak Each, 325 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97 dB

Sundown Audio NeoPro-10 v.4 (Sold Individually)

340W RMS 10" NEO Series Pro Audio Midrange 8-ohm Speaker (S-NEOPROV4108)

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340W RMS 10" NEO Series Pro Audio Midrange 8-ohm Speaker (S-NEOPROV4108)

• 340 watts RMS each
• Carbon Fiber cone material
• Impedance: 8 ohm
• Sensitivity: 97.9 dB

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List price $299.99
-23% $229.99

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Cerwin-Vega H4C

300W Peak (100W RMS) 4" Vega Series 2 Way Component Speaker System

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300W Peak (100W RMS) 4" Vega Series 2 Way Component Speaker System

• 150 watts Peak Each, 50 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• Polypropylene cone material
• Powder-Coated, Rigid Stamped Steel Basket

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $215.99
-17% $179.99 /set

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List price $215.99
-17% $179.99
$161.99 with coupon | Price details
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DS18 10PRO1200MB-8 (Sold Individually)

1200W Peak (600W RMS) 10" Pro Audio Mid-Bass 8-ohm Loudspeaker

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1200W Peak (600W RMS) 10" Pro Audio Mid-Bass 8-ohm Loudspeaker

• 1200 watts Peak, 600 watts RMS
• Curvilinear Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 98 dB

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$239.95

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Sundown Audio VEX-10 (Sold Individually)

500W RMS 10" VEX Series Pro Audio Midrange 8-ohm Speaker (S-VEX108)

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500W RMS 10" VEX Series Pro Audio Midrange 8-ohm Speaker (S-VEX108)

• 500 watts RMS Each
• Carbon Fiber cone material
• Impedance: 8 ohm
• Sensitivity: 96.6 dB

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Fits your GS400
List price $383.99
-17% $319.99

In stock

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• 500 watts RMS Each
• Carbon Fiber cone material
• Impedance: 8 ohm
• Sensitivity: 96.6 dB

Limited time!

DS18 PRO-XLNEO10MB (Sold Individually)

2000W Peak (1000W RMS) 10" PRO-XLNEO Series Pro Audio Mid-Bass 8-ohm Loudspeaker

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2000W Peak (1000W RMS) 10" PRO-XLNEO Series Pro Audio Mid-Bass 8-ohm Loudspeaker

• 2000 watts Peak, 1000 watts RMS
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 96.5 dB

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$347.95

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Diamond Audio MSMB102NEO

1600W Peak (800W RMS) 10" MS NEO Series Mid Bass 2-ohm Powersports and Motorcycle Speakers

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1600W Peak (800W RMS) 10" MS NEO Series Mid Bass 2-ohm Powersports and Motorcycle Speakers

• 800 watts Peak Each, 400 watts RMS Each
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 2 ohm
• Sensitivity: 96 dB

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$1,099.99 /pair

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Alpine S2-S40 (Like New (Open Box))

280W Peak (90W RMS) 4" Next Generation S-Series 2-way Coaxial 4-ohm Speakers

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280W Peak (90W RMS) 4" Next Generation S-Series 2-way Coaxial 4-ohm Speakers

• 140 watts Peak Each, 45 watts RMS Each
• 0.8" Cloth Soft Dome Tweeters with in-line crossovers
• Interlaced Carbon-Glass Fiber Composite - IMPP cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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Install kits available for most vehicles

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $130.00
-37% $82.46 /pair

In stock

Only 1 Left!

American Bass GFPRO-10-MB (Sold Individually)

800W Peak (400W RMS) 10" Godfather Pro Series Midbass 4-ohm Speaker

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800W Peak (400W RMS) 10" Godfather Pro Series Midbass 4-ohm Speaker

• 800 watts Peak, 400 watts RMS
• Kevlar Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB

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List price $174.24
-29% $124.55

In stock.

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Diamond Audio MSMB104NEO

1600W Peak (800W RMS) 10" MS NEO Series Mid Bass 4-ohm Powersports and Motorcycle Speakers

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1600W Peak (800W RMS) 10" MS NEO Series Mid Bass 4-ohm Powersports and Motorcycle Speakers

• 800 watts Peak Each, 400 watts RMS Each
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 4 ohm
• Sensitivity: 95 dB

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Install kits available for most vehicles

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$1,099.99 /pair

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Deaf Bonce Apocalypse DPW-1030

1000W Peak (800W RMS) 10" Apocalypse Series 4-ohm Midwoofer Car Speakers

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1000W Peak (800W RMS) 10" Apocalypse Series 4-ohm Midwoofer Car Speakers

• 1000 watts Peak Each, 800 watts RMS Each
• Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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$219.90

Available

Ships in 10-14 days

Limited time!

Infinity REF407F (INFSPKRF407FUS)

210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

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210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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Install kits available for most vehicles

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
List price $139.95
-21% $109.95 /pair

In stock

Massive Audio MC10II (Sold Individually)

800W Peak (400W RMS) 10" MC Series 8-ohm Pro-Audio Midrange Car Speaker

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800W Peak (400W RMS) 10" MC Series 8-ohm Pro-Audio Midrange Car Speaker

• 800 watts Peak Each, 400 watts RMS Each
• Kevlar-Enhanced Paper cone material
• Impedance: 8 ohm
• Sensitivity: 99.2 dB

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List price $149.99
-20% $119.99

Available

Ships in 10-14 days

JBL GX428 (JBLGX428AM)

210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

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210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• Soft Dome tweeters with deflector
• Polypropylene Plus One woofer cone material
• Impedance: 2.3 ohm
• Sensitivity: 90 dB

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Install kits available for most vehicles

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Fits multiple locations in your GS400
  • Lower Front Door
  • Rear Door
$64.95 /pair

Available

Ships in 10-14 days

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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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