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Conversion Adapters

Many cars today, especially those made by foreign automakers, come with a factory-installed auxiliary input for the car stereo. But if you have an older car without this feature, or if you want to integrate your portable media player into the vehicle's audio system, you'll need an adapter to connect the two. Browse the top-ranked list of conversion adapters below along with associated reviews and opinions. 

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  1. Insignia™ - RCA to HDMI Converter - Black

    SKU: J2FPJKLFTJ

    Product Description

    A black converter that connects RCA analog devices to HDMI displays, supporting HD and Full HD output.
    See all A/V Adapters
    Your price for this item is $20.99
    Save $19
    The previous price was $39.99

  2. Insignia™ - HDMI to RCA Converter - Black

    SKU: J2FPJK9G8J

    Product Description

    A black converter that transforms HDMI input signals to RCA output for use with analog displays.
    See all A/V Adapters
    Your price for this item is $39.99

  3. Lectron - Tesla to J1772 EV Charger Adapter for J1772 Electric Vehicle - White

    SKU: CGC74RQCRX

    Product Description

    A white adapter enabling fast, portable charging for J1772 EVs using Tesla chargers and connectors.
    See all Electric Car Charger Accessories
    Your price for this item is $113.99
    Save $26
    The previous price was $139.99

  4. Lectron - J1772 to Tesla (NACS) EV Charging Adapter-up to 80 Amp (240V) - Black

    SKU: CGC74RQHVZ

    Product Description

    A black adapter enabling Tesla vehicles to charge at public Level 2 J1772 EV charging stations.
    See all Electric Car Chargers
    Your price for this item is $50.99
    Save $9
    The previous price was $59.99

  5. Maestro - Adapter for OEM Satellite Radio Antennas - Black/Gray

    SKU: JXC4YHZ7VK

    Use existing antenna....This adapter allows use of the existing OEM antenna.No apparent issues....Satellite radio antenna...Satellite radio antenna. Great for hooking up Your antenna, I must have, great...

    Product Description

    An easy-to-use black and gray adapter that connects factory satellite radio antennas to aftermarket receivers.
    See all Car Installation Parts & Accessories
    Your price for this item is $16.99

  6. Sigma - Mount Converter MC-11

    SKU: J76FHVFT72

    Product Description

    A versatile mount converter enabling smooth autofocus and optical stabilization for adapting lenses to Sony E-mount cameras.
    See all DSLR Short-Range Zoom Lenses
    Your price for this item is $279.00

  7. ASUS - MA-25 2.5Gbps Ethernet over Coax MoCA Adapter (1-pack) - Black

    SKU: JJG7VT9223

    Product Description

    A black MoCA adapter delivering up to 2.5Gbps Ethernet speeds over existing coaxial wiring.
    See all Ethernet Cables
    Your price for this item is $79.99

  8. PAC - Analog-to-Digital Audio Converter for Select Hyundai Vehicles - Black/Blue

    SKU: J2VK4TVGRJ

    Product Description

    An analog-to-digital audio converter in black/blue that retains factory-amplified sound for select Hyundai vehicles.
    See all Car Audio Installation
    Your price for this item is $84.99
    Save $5
    The previous price was $89.99

  9. Metra - Axxess 2-Channel Adjustable Line Output Converter Interface - Multi

    SKU: J7RX7Y3ZC4

    Product Description

    An adjustable two-channel converter that transforms speaker-level audio to line-level for easy amplifier integration.
    See all Deck Interfaces
    Your price for this item is $14.99

  10. Metra - Axxess 2-Channel Adjustable Line Output Converter Interface - Multi

    SKU: J7RX7Y3Z37

    Product Description

    A multi-color interface that converts speaker-level audio to line-level for adding amplifiers or EQs.
    See all Deck Interfaces
    Your price for this item is $29.99
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.