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American Bass SQ-5.25-FR

240W Peak (120W RMS) 5.25" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

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240W Peak (120W RMS) 5.25" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

• 120 watts Peak Each, 60 watts RMS Each
• Swivel 3/4" Neodymium Dome Tweeters
• Glass Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $83.00
-29% $59.28 /pair

In stock.

Limited time!

Earthquake Sound VTEK-52Xi

800W RMS 5.25" VTEK Series 2-Way Coaxial 2-ohm Car Speakers

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800W RMS 5.25" VTEK Series 2-Way Coaxial 2-ohm Car Speakers

• 400 watts RMS Each
• 3/4" Silk Dome swiveling tweeters
• Glass Carbon Fiber cone material
• Impedance: 2 ohm
• Sensitivity: 89 dB

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$159.00 /pair

In stock.

Limited time!

Diamond Audio HX653DI

300W RMS 6.5" HEX Diamante Italia Series 3-Way 3.3-ohm Component Speaker System

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300W RMS 6.5" HEX Diamante Italia Series 3-Way 3.3-ohm Component Speaker System

• 150 watts RMS Each
• 1" Silk Dome Tweeters
• Bronze Fiberglass cone material
• Impedance: 3.3 ohm
• Sensitivity: 90 dB

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$1,319.99 /set

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Only 1 Left!

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Hertz CK 130

420W Peak (140W RMS) 5.25" Cento Series 2-way 4-ohm Component Speaker System

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420W Peak (140W RMS) 5.25" Cento Series 2-way 4-ohm Component Speaker System

• 210 watts Peak Each, 70 watts RMS Each
• CCX 2 crossover with tweeter emission level control (0 to +3dB)
• 1" Tetolon Dome tweeters
• Semi-pressed Paper-Mica cone material
• Impedance: 4 ohm
• Sensitivity: 92.5 dB

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List price $480.00
-17% $399.99 /set

Available

Ships in 10-14 days

Kenwood KFC-C1356S

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

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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

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List price $60.00
-42% $34.99 /pair

Available

Ships in 10-14 days

Limited time!

MB Quart DK2-113

180W Peak (90W RMS) 5.25" Discus Series 2-way 4-ohm Coaxial Car Speakers

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180W Peak (90W RMS) 5.25" Discus Series 2-way 4-ohm Coaxial Car Speakers

• 90 watts Peak Each, 45 watts RMS Each
• Aluminum Inverted Dome tweeters
• Lightweight Thermoformed Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $79.99
-13% $69.99 /pair

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Ships in 10-14 days

Limited time!

MTX SS5

250W RMS 5.25" Signature Series 2 Way Component 4-ohm System

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250W RMS 5.25" Signature Series 2 Way Component 4-ohm System

• 125 watts RMS Each
• 1-3/16" Teteron Dome tweeters
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 84.9 dB

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1
$499.95 /set

Available

Ships in 10-14 days

American Bass SYMPHONY 5.25 FR

300W Peak (150W RMS) 5.25" Symphony Series 2 Way Coaxial 4-ohm Speakers

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300W Peak (150W RMS) 5.25" Symphony Series 2 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 75 watts RMS Each
• Neodymium Cone tweeters
• cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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List price $70.45
-34% $46.28 /pair

In stock.

Deaf Bonce Black Hydra Delta 513X

240W Peak (140W RMS) 5.25" Black Hydra Series 2 Way Coaxial 4-ohm Speakers

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240W Peak (140W RMS) 5.25" Black Hydra Series 2 Way Coaxial 4-ohm Speakers

• 120 watts Peak Each, 60 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 87.4 dB

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$49.90 /pair

Available

Ships in 10-14 days

Hertz CPK 165 + FREE $200 Gift Card

160W RMS 6.5" Cento Series 2-Way Component Speaker System

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160W RMS 6.5" Cento Series 2-Way Component Speaker System

• 160 Watts Max Each, 55 Watts RMS Each
•Pressed-paper cone cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92.5 dB

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List price $800.00
-38% $499.99 /set

In stock

• 160 Watts Max Each, 55 Watts RMS Each
•Pressed-paper cone cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92.5 dB

Limited time!

NVX VADM4 Amplifier + 5.25" NVX Speakers

400W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

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400W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

• 400 Watt True RMS Output!
• Marine Certified 4-Channel Micro Class D Amplifier
• 75W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/2 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

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138
List price $371.97
-27% $269.97

In stock

• 400 Watt True RMS Output!
• Marine Certified 4-Channel Micro Class D Amplifier
• 75W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/2 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

Lowest price in 30 days

Infinity REF507CF with Installation Accessories

390W Peak (130W RMS) 5.25" Reference Series 2-way 4-ohm Component Speaker System + 5.25" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

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390W Peak (130W RMS) 5.25" Reference Series 2-way 4-ohm Component Speaker System + 5.25" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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230
List price $322.66
-33% $216.51

In stock

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Hertz CPX 165 + FREE $100 GIft Card

6.5" Cento Series 2-Way Coaxial Car Speakers

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6.5" Cento Series 2-Way Coaxial Car Speakers

• 140 Watts Max Each, 45 Watts RMS Each
• Pressed-paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB
• Mounting Depth: 2-5/8"

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8
List price $505.00
-31% $349.99 /pair

In stock

• 140 Watts Max Each, 45 Watts RMS Each
• Pressed-paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB
• Mounting Depth: 2-5/8"

Infinity Kappa 503CF (INFSPKKA503CFAM) (Open Box, Great)

480W Peak (160W RMS) 5.25” Kappa Series 2 Way 3-ohm Component Speaker System

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480W Peak (160W RMS) 5.25” Kappa Series 2 Way 3-ohm Component Speaker System

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge Driven Dome uni-pivot and angled tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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List price $449.95
-38% $279.30 /set

In stock

Only 1 Left!

Kicker CSC5 (46CSC54) (Open Box, Great)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

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450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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List price $119.99
-42% $69.99 /pair

In stock

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Alpine HDZ-65C (Open Box, Great)

600W Peak (200W RMS) 6.5” Status Series Hi-Res 2-Way Component 4-ohm Speaker System

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600W Peak (200W RMS) 6.5” Status Series Hi-Res 2-Way Component 4-ohm Speaker System

• 300 watts Peak Each, 100 watts RMS Each
• Hi-Res Audio Certified
• 1-1/4" Carbon Composite Cone Tweeters
• Carbon Composite cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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4
List price $1080.00
-38% $674.96 /set

In stock

Only 1 Left!

• 300 watts Peak Each, 100 watts RMS Each
• Hi-Res Audio Certified
• 1-1/4" Carbon Composite Cone Tweeters
• Carbon Composite cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Pioneer TS-G1320S (Open Box, Great)

500W Peak (70W RMS) 5.25" G-Series 2-way 4-ohm Coaxial Car Speakers

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500W Peak (70W RMS) 5.25" G-Series 2-way 4-ohm Coaxial Car Speakers

• 250 watts Peak Each, 35 watts RMS Each
• 1-3/16" Polyethylene Terephthalate (PET) Balanced Dome tweeters
• Mica Injected Polypropylene - MIPP cone material with Progressive Flex Suspension System (PFSS) spider
• Impedance: 4 ohm
• Sensitivity: 87 dB

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27
List price $65.00
-38% $39.99 /pair

In stock

Only 3 Left!

DS18 EXL-SQ5.25 (Open Box, Great)

680W Peak (160W RMS) 5.25" EXL-SQ Series 2-way 3-ohm Coaxial Car Speakers

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680W Peak (160W RMS) 5.25" EXL-SQ Series 2-way 3-ohm Coaxial Car Speakers

• 340 watts Peak Each, 80 watts RMS Each
• 1" PEI (Polyetherimide) Dome tweeters with neodynium magnets
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 86 dB

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List price $143.95
-30% $100.76 /pair

In stock

Only 1 Left!

Kicker CSC5 (46CSC54) (Like New (Open Box))

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

46CSC54 big
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450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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Free or discounted install kits when available.

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10
List price $119.99
-29% $84.99 /pair

In stock

Only 2 Left!

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Infinity Reference 5030cx (REF5030CX) (Open Box, Great)

390W Max (130W RMS) 5.25" Reference Series 2 Way 3-ohm Component Speaker System

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390W Max (130W RMS) 5.25" Reference Series 2 Way 3-ohm Component Speaker System

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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List price $249.95
-44% $139.99 /set

In stock

Only 3 Left!

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    FAQ for Speakers in 2003 QX4

    Q: Can I upgrade or change the Speakers in 2003 Infiniti QX4?

    A: Yes this page includes all the best Speakers that work in your QX4.

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

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