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authorized dealer for Boston Acoustics SX55 SX Series 5-1/4 2-way Car Audio Speakers

Boston Acoustics SX55 SX Series 5-1/4" 2-way Car Audio Speakers

Item #: 74837 Availability: DISCONTINUED
Mfg Part No.: SX55 Condition: Brand New

Free 2-Year Warranty


For pick-up:   Please give us a call to confirm your order so we can have the product ready for you.


The clear, well-balanced sound of Boston's SX speakers offers an excellent performance boost to almost any car audio system.

The SX55 5-1/4" speaker combines Boston's Type-S2 tweeter with a heavy duty copolymer woofer and a durable rubber surround. A contoured tweeter plane provides an extended stereo "sweet spot" for smooth, realistic high-frequency response — no matter where you're sitting.

A built-in crossover sculpts the frequencies going to the woofer and tweeter for smooth blending of the highs and mids, and protects the tweeter against power overload. Compact, lightweight neodymium magnets reduce the size of these speakers so they can fit in more vehicles without sacrificing performance.



    • Boston Acoustics SX-55 5-1/4" SX SERIES 2-Way Car Speakers
    • Power Handling:
      • Peak: 280 watts per pair / 140 watts each
      • RMS: 100 watts per pair / 50 watts each
    • Copolymer woofer cones
    • Butyl rubber surrounds
    • 3/4" Type S2 Kortec Dome tweeters
    • Contoured tweeter plane improves off-axis response
    • Integrated crossover
    • Grills included
    • Mounting hardware included
    • 4 ohms impedance
    • Neodymium woofer and tweeter magnets
    • Top-mount depth: 2-3/16"


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