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JBL GX428 (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" GX Series 2-way Coaxial Speakers (2-Pairs)

GX428AM_2 big
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420W Peak (140W RMS) 4" GX Series 2-way Coaxial Speakers (2-Pairs)

• 105 watts Peak Each, 35 watts RMS Each
• Soft Dome Tweeters
• Polypropylene cone material
• Impedance: 2.3 ohm
• Sensitivity: 90 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
$129.90

Available

Ships in 10-14 days

• 105 watts Peak Each, 35 watts RMS Each
• Soft Dome Tweeters
• Polypropylene cone material
• Impedance: 2.3 ohm
• Sensitivity: 90 dB

DS18 ZXI-44 (2-Pairs, 4-Total)

300W Peak (100W RMS) 4" ZXI Series 2-Way 4-Ohm Coaxial Car Speakers (2-Pairs)

ZXI44_2 big
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300W Peak (100W RMS) 4" ZXI Series 2-Way 4-Ohm Coaxial Car Speakers (2-Pairs)

• 150 watts Peak Each, 50 watts RMS Each
• 1" PEI (Polyetherimide) Dome Tweeters
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
$161.90

In stock.

• 150 watts Peak Each, 50 watts RMS Each
• 1" PEI (Polyetherimide) Dome Tweeters
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

NVX - Worth the Envy - Direct to Consumer Car Audio

Massive Audio MX4 (2-Pairs, 4-Total)

600W Max (120W RMS) 4" MX Series 2-Way Coaxial Car Speakers (2-Pairs)

MA-MX4_2 big
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600W Max (120W RMS) 4" MX Series 2-Way Coaxial Car Speakers (2-Pairs)

• 150W Max Each, 30W RMS Each
• .5" PEI Tweeter
• Laminated Paper Cone
• 4 ohm Impedance
• Sensitivity: 91.5 dB
• Mounting Depth: 1.63"

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
1
List price $99.98
-20% $79.98

Available

Ships in 10-14 days

• 150W Max Each, 30W RMS Each
• .5" PEI Tweeter
• Laminated Paper Cone
• 4 ohm Impedance
• Sensitivity: 91.5 dB
• Mounting Depth: 1.63"

Diamond Audio DMD42 with Speaker Installation Kit

Includes: (2) 4” 2-Way speaker, 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

DMD42, FRING4, SDRLR1, SDSK2, BTK106 big
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Includes: (2) 4” 2-Way speaker, 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

• 60 watts Peak Each, 30 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

Save 15% Off Package Deals at Checkout!
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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
144
List price $191.70
-24% $146.52 /pair

In stock.

• 60 watts Peak Each, 30 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

Diamond Audio DMD42 with Sound Damping

120W Peak (60W RMS) 4" DMD Series 2-way Coaxial Car Speakers + NVX SDSK2 Sound Damping

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120W Peak (60W RMS) 4" DMD Series 2-way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 60 watts Peak Each, 30 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
48
List price $138.73
-10% $124.98

In stock.

• 60 watts Peak Each, 30 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

JBL GX428 (JBLGX428AM) with Sound Damping

210W Peak (70W RMS) 4" GX Series 2-way 2.3-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

GX428AM_SDBSK2 big
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210W Peak (70W RMS) 4" GX Series 2-way 2.3-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

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

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
48
$79.94

Available

Ships in 10-14 days

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

Massive Audio MX4 with Sound Damping

300W Peak (60W RMS) 4" MX Series 2-way 4-ohm Coaxial Car Speakers+ NVX SDBSK2 Premium Sound Damping

MA-MX4_SDBSK2 big
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300W Peak (60W RMS) 4" MX Series 2-way 4-ohm Coaxial Car Speakers+ NVX SDBSK2 Premium Sound Damping

• 150 watts Peak Each, 30 watts RMS Each
• 0.51" Hard diaphragm Dome tweeters with ferro-fluid cooled VC
• Laminate-Treated Paper cone material
• 2 custom painted metal speaker grilles Included
• Impedance: 4 ohm
• Sensitivity: 91.5 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your K5 Blazer
49
List price $68.73
-20% $54.98

Available

Ships in 10-14 days

• 150 watts Peak Each, 30 watts RMS Each
• 0.51" Hard diaphragm Dome tweeters with ferro-fluid cooled VC
• Laminate-Treated Paper cone material
• 2 custom painted metal speaker grilles Included
• Impedance: 4 ohm
• Sensitivity: 91.5 dB

Rockford Fosgate Prime R14X2 (Open Box, Great)

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

R14X2 big
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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

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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
14
List price $64.99
-15% $55.24 /pair

In stock

Lowest price in 30 days

JL Audio C2-400x (Open Box, Great)

100W Peak (70W RMS) 4” Evolution C2 Series 2-way 4-ohm Coaxial Car Speakers

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100W Peak (70W RMS) 4” Evolution C2 Series 2-way 4-ohm Coaxial Car Speakers

• 50 watts Peak Each, 35 watts RMS Each
• 0.75" Silk Dome Tweeters
• 2 speaker grilles included
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 87.5 dB

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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
9
List price $189.99
-26% $140.24 /pair

In stock

NVX NSP4

300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers

NSP4 big
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300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers

• 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"

3+ offers available
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Install kits available for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
25
List price $59.99
-25% $44.99 /pair

In stock

Continue to cart

Available Offers (3) for NVX NSP4
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Prime Time! Save 25% at Checkout!
List price $59.99
-25% $44.99
$33.74 with coupon | Price details
2026-06-28 23:59:00
Free Speaker Accessory at Checkout!
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20

NVX VSP4

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

VSP4 big
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450W Peak (150W RMS) 4" V-Series 2 Way Coaxial Car Speakers

• 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"

3+ offers available
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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
17
List price $71.99
-17% $59.99 /pair

In stock

Continue to cart

Available Offers (3) for NVX VSP4
Offer image
Prime Time! Save 25% at Checkout!
List price $71.99
-17% $59.99
$44.99 with coupon | Price details
2026-06-28 23:59:00
Free Speaker Accessory at Checkout!
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20
Used from: $38.49

Cerwin-Vega H410

420W Peak (140W RMS) 4x10" Vega Series 2-Way Coaxial 4-ohm Speakers

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420W Peak (140W RMS) 4x10" Vega Series 2-Way Coaxial 4-ohm Speakers

• 210 watts Peak Each, 70 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• UV-Treated Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Side Panel
List price $119.99
-17% $99.99 /pair

• 210 watts Peak Each, 70 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• UV-Treated Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Infinity Reference REF-4032cfx with Sound Damping

210W Peak (70W RMS) Reference Series 4" 2-Way Car Speakers + NVX SDSK2 Sound Damping

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210W Peak (70W RMS) Reference Series 4" 2-Way Car Speakers + NVX SDSK2 Sound Damping

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

Save 15% Off Package Deals at Checkout!
found car based on your search
Fits your K5 Blazer
49
List price $158.69
-40% $94.98

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

Limited time!

Infinity Reference REF-4032cfx (REF4032CFXAM)

210W Peak (70W RMS) 4" Reference Series 2 Way Coaxial 3-ohm Speakers

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210W Peak (70W RMS) 4" Reference Series 2 Way Coaxial 3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Free Speaker Accessory at Checkout!
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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
1
List price $139.95
-43% $79.99 /pair

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Limited time!

Kenwood KFC-1098RS

480W Peak (100W RMS) 4" RS Series 2-Way Coaxial 4-ohm Car Speakers

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480W Peak (100W RMS) 4" RS Series 2-Way Coaxial 4-ohm Car Speakers

• 240 watts Peak Each, 50 watts RMS Each
• 1" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

Free Speaker Accessory at Checkout!
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VIP Product Get $10.90 in rewards to spend later

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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
List price $130.00
-16% $109.00 /pair

• 240 watts Peak Each, 50 watts RMS Each
• 1" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

Limited time!

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"

Purchase $400 or More of NVX and Save 15%!
found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner

• 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"

Limited time!

Rockford Fosgate Punch P1V2-4

300W Peak (150W RMS) 4" Punch P1 Series 3 Way Coaxial 4-ohm Speakers

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300W Peak (150W RMS) 4" Punch P1 Series 3 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 75 watts RMS Each
• 3/4" Tetolon Inverted Dome tweeters
• 3/8" Polypropylene-Piezo super tweeters
• Mica reinforced Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Free Speaker Accessory at Checkout!
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VIP Product Get $16.00 in rewards to spend later

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Save $8 on install kits for this speaker

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
List price $215.99
Save $56.00
-26% $159.99 /pair

• 150 watts Peak Each, 75 watts RMS Each
• 3/4" Tetolon Inverted Dome tweeters
• 3/8" Polypropylene-Piezo super tweeters
• Mica reinforced Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Limited time!

Kenwood KFC-C1056S

440W Peak (42W RMS) 4" 2-Way Dual Cone 4-ohm Car Speakers

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440W Peak (42W RMS) 4" 2-Way Dual Cone 4-ohm Car Speakers

• 220 watts Peak Each, 21 watts RMS Each
• Polypropylene cone material
• Smaller whizzer cone to extend its frequency response
• Impedance: 4 ohm
• Sensitivity: 88 dB

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Install kits available for most vehicles

found car based on your search
Fits the following location in your K5 Blazer
  • Dash Corner
1
List price $70.00
Save 44%
-44% $39.00 /pair

• 220 watts Peak Each, 21 watts RMS Each
• Polypropylene cone material
• Smaller whizzer cone to extend its frequency response
• Impedance: 4 ohm
• Sensitivity: 88 dB

Limited time!

NVX NSP410 with Sound Damping

480W Peak (160W RMS) 4x10" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters + NVX SDBSK2 Premium Sound Damping

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480W Peak (160W RMS) 4x10" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters + NVX SDBSK2 Premium Sound Damping

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

Purchase $400 or More of NVX and Save 15%!
found car based on your search
Fits your K5 Blazer
50
List price $90.73
-22% $70.48

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

Infinity Reference REF-4032cfx (2-Pairs, 4-Total)

420W Peak (140W RMS) Reference Series 4" 2-Way Car Speakers (2-Pairs)

Go to item page Right Arrow Icon of Right Arrow

420W Peak (140W RMS) Reference Series 4" 2-Way Car Speakers (2-Pairs)

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

Save 15% Off Package Deals at Checkout!
found car based on your search
Fits your K5 Blazer
1
List price $279.90
-43% $159.98

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

NVX - Worth the Envy - Direct to Consumer Car Audio

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    FAQ for Speakers in 1978 K5 Blazer

    Q: Can I upgrade or change the Speakers in 1978 Chevrolet K5 Blazer?

    A: Yes this page includes all the best Speakers that work in your K5 Blazer.

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

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