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Soundstream SPM.804

1000W Peak (500W RMS) 8" Pro Audio Midrange 4-ohm Speakers

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1000W Peak (500W RMS) 8" Pro Audio Midrange 4-ohm Speakers

• 500 watts Peak Each, 250 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 95.5 dB

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List price $78.99
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-24% $59.99 /pair

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• 500 watts Peak Each, 250 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 95.5 dB

MTX RTX8 (Sold Individually)

300W RMS 8" Road Thunder Extreme Series Pro Audio Mid-bass 4-ohm Speakers

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300W RMS 8" Road Thunder Extreme Series Pro Audio Mid-bass 4-ohm Speakers

• 150 watts RMS Each
• Treated Paper cone material
• Large magnet attached to a stamped steel basket
• Impedance: 4 ohm
• Sensitivity: 97.7 dB

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List price $69.95
-14% $59.95

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DS18 PRO-GM8.4 (Sold Individually)

580W Peak (190W RMS) 8" PRO-GM Series 4-Ohm Midrange Loudspeaker

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580W Peak (190W RMS) 8" PRO-GM Series 4-Ohm Midrange Loudspeaker

• 580 watts Peak Each, 190 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 94 dB

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$34.95

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Sundown Audio VEX-8 (VEX-88)

300W RMS 8" VEX Series Pro Audio Midrange 8-ohm Speaker (S-VEX84)

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300W RMS 8" VEX Series Pro Audio Midrange 8-ohm Speaker (S-VEX84)

• 300 watts RMS Each
• Carbon Fiber cone material
• Impedance: 8 ohm
• Sensitivity: 94.3 dB

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List price $275.99
-17% $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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List price $215.99
-17% $179.99 /set

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Diamond Audio MS82NEO4

1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 4-ohm Powersports and Motorcycle Speakers

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1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 4-ohm Powersports and Motorcycle Speakers

• 600 watts Peak Each, 300 watts RMS Each
• Polyethylene-Naphthalate Horn Tweeters
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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$879.99 /pair

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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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List price $300.00
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-33% $199.95 /pair

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Hertz SV 200 NEO (SV200 NEO)

1000W Peak (400W RMS) 8" SPL Show Series 4-ohms Midrange Car and Motorcycle Speakers

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1000W Peak (400W RMS) 8" SPL Show Series 4-ohms Midrange Car and Motorcycle Speakers

• 500 watts Peak Each, 200 watts RMS Each
• Terminals and mounting holes compatible for Harley-Davidson motorbikes
• Water-repellent pressed paper cone material
• Impedance: 4 ohm
• Sensitivity: 100 dB

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List price $650.00
-15% $549.99 /pair

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DS18 PRO-GM8

580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker

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580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker

• 580 watts Peak Each, 190 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 93 dB

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List price $41.99
-17% $34.95

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Diamond Audio MS82NEO2

1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 2-ohm Powersports and Motorcycle Speakers

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1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 2-ohm Powersports and Motorcycle Speakers

• 600 watts Peak Each, 300 watts RMS Each
• Polyethylene-Naphthalate Horn Tweeters
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 2 ohm
• Sensitivity: 96 dB

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$879.99 /pair

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Sundown Audio VEX-12 S8 (Sold Individually)

500W RMS 12" VEX Series Pro-Audio Midrange 8-ohm Speaker (S-VEX128)

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500W RMS 12" VEX Series Pro-Audio Midrange 8-ohm Speaker (S-VEX128)

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

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List price $443.99
-17% $369.99

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DS18 PRO-CF8.2SLN

400W Peak (200W RMS) 8" PRO Series Midrange 2-ohm Motorcycle and Powersports Shallow Loudspeaker

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400W Peak (200W RMS) 8" PRO Series Midrange 2-ohm Motorcycle and Powersports Shallow Loudspeaker

• 400 watts Peak, 200 watts RMS
• Curvilinear Water Resistant Carbon Fiber cone
• Impedance: 2 ohm
• Sensitivity: 95 dB

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$199.95

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• 400 watts Peak, 200 watts RMS
• Curvilinear Water Resistant Carbon Fiber cone
• Impedance: 2 ohm
• Sensitivity: 95 dB

Diamond Audio MSPRO8

500W RMS 8” MSPRO Series 4-ohm Pro Audio High Output Speakers for Harley-Davidson Motorcycles

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500W RMS 8” MSPRO Series 4-ohm Pro Audio High Output Speakers for Harley-Davidson Motorcycles

• Peak Each, 250 watts RMS Each
• Thermal Molded Waterproof Paper cone material
• Impedance: 4 ohm
• Sensitivity: 100 dB
• IP65 marine certified
• Designed for Harley-Davidson motorcycles

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List price $369.99
$359.99 /pair

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MTX PS8C

600W Peak (300W RMS) 8" Coaxial 4-ohm Powersports Speakers

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600W Peak (300W RMS) 8" Coaxial 4-ohm Powersports Speakers

• 300 watts Peak Each, 150 watts RMS Each
• Teteron Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90.8 dB

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$379.95 /pair

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• 300 watts Peak Each, 150 watts RMS Each
• Teteron Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90.8 dB

DS18 PRO-GM8.4PK

1160W Peak (380W RMS) 8” PRO-GM Series Component Midrange 4-ohm Speakers

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1160W Peak (380W RMS) 8” PRO-GM Series Component Midrange 4-ohm Speakers

• 580 watts Peak Each, 190 watts RMS Each
• 1" Aluminum Bullet tweeters
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 94 dB

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$117.95 /pair

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Alpine S2-S40C

280W Peak (90W RMS) 4" S-Series Hi-Res 2-Way Component Car Speakers

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280W Peak (90W RMS) 4" S-Series Hi-Res 2-Way Component Car Speakers

• 140 watts Peak Each, 45 watts RMS Each
• Hi-Res Audio Certified
• 1" Cloth Dome Tweeters
• Adjustable tweeters with threaded removable housing
• Polypropylene, Glass Fiber and Mica cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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List price $180.00
-17% $149.95 /set

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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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$64.95 /pair

Available

Ships in 10-14 days

Limited time!

Diamond Audio VSP4BMW

160W Peak (80W RMS) 4" VSP Series 2-way 4-ohm Component Speaker Set for select 2003-2025 vehicles from BMW

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160W Peak (80W RMS) 4" VSP Series 2-way 4-ohm Component Speaker Set for select 2003-2025 vehicles from BMW

• 80 watts Peak Each, 40 watts RMS Each
• Silk Dome tweeters
• Reinforced Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85.6 dB

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$499.99

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Deaf Bonce Machete LW-80A4

200W Peak (100W RMS) 8” Machete Series 4-ohm Midbass Car Speakers

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200W Peak (100W RMS) 8” Machete Series 4-ohm Midbass Car Speakers

• 200 watts Peak Each, 100 watts RMS Each
• Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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$119.90

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DS18 PRO-NS8 (Sold Individually)

400W Peak (200W RMS) 8" PRO-NS Series 8-ohm Shallow-mount Full-Range Speaker

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400W Peak (200W RMS) 8" PRO-NS Series 8-ohm Shallow-mount Full-Range Speaker

• 400 watts Peak Each, 200 watts RMS Each
• 1-1/4" Dome Tweeters
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 96 dB

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$79.95

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    FAQ for Speakers in 2014 428i

    Q: Can I upgrade or change the Speakers in 2014 BMW 428i?

    A: Yes this page includes all the best Speakers that work in your 428i.

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

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