Boom! Audio Stage II Amplifier Kit - Fairing Mounted

    Part Number 76000278A





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    Crank up the volume and let your bike speak for itself. Boom!™ Audio Amplifiers with built-in fixed EQs are smart, powerful, and tough.

    • Marine-grade, Class D amplifier
    • Nominal output power: 75 Watts/channel into a 2-ohm load; 300-watts RMS total
    • Boom!™ Audio EQs directs a different signal to each pair of speakers based on the bike model, speaker location, and speed
    • Designed to withstand the harsh on-the-road environment and were put through rigorous on and off-bike testing
    • An amplifier is required for each pair of Stage II Speakers added to your Boom!™ Audio-equipped Touring bike
    • Dealer Digital Technician software update is required - Dealer installation is recommended
    • Kit includes all mounting hardware and wiring harness
    • Stop by a participating dealer to interact with a unique audio display that lets you simulate how your bike will sound with Boom!™ Audio upgrades


    • Number of Channels

    • Average Current Draw

    • Max Current Draw

      Peak at 50A
    • Frequency Response

      20Hz - 20kHz +/- 0.5dB
    • Rated Power Output

      75W Per Channel, 300W Total
    • Operating Voltage

      9V - 16V
    • Water Resistant

    • Dealer Install Recommended

    • Warranty

      1 year limited warranty – Go to for full details
    • Sold in Unit

    • In The Box

      Amplifier, all mounting hardware and wiring harness
    • Class

      Class D


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    Fits ’14-later Electra Glide®, Street Glide®, Ultra Limited™ and Tri Glide™ models equipped with a Boom!™ Box audio system. Dealer Digital Technician software update is required. Dealer installation is recommended. Separate purchase of Power Extension Harness P/N 69200921 is required if installed with Hidden AM/FM/WB Antenna P/N 76000513, Electra Glo™ Headlamp Trim Rings or Fairing Edge Lights.

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    More Info

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      Use of a Boom!™ Audio Amplifier turns off the radio's internal amplifier. Installation of a third or fourth set of speakers requires the Boom!™ Audio Speaker Expansion Kit.


      Boom! Audio Amplifier Kit-Fairing is rated 3.2 out of 5 by 13.
      Rated 5 out of 5 by from Fine for me. The stage 2 kit output is very clear. The dealership installed the amp.
      Date published: 2017-11-01
      Rated 5 out of 5 by from Boom AMP is the missing Link Just an Awesome boost of power to drive my Stage II three way speakers on my 14 Street Glide. Clean and very powerful. You won't be let down. If you have Harley install and flash the head unit, you are good to go. Most unhappy customers I see out there are trying to save some money an go after market and self installed. Good luck to the will never be happy. I took advantage of the 20 percent discount on parts and labor. Over all I am very pleased with the sound quality. Believe me when I say Have your local Harley service install, or join the cry babies out there.
      Date published: 2017-04-21
      Rated 4 out of 5 by from Outstanding upgrade to my FLHTK, no issues, enhanced sound Controls response is great, sound is outstanding with substantial volume increase at speeds
      Date published: 2017-02-17
      Rated 4 out of 5 by from Stage 1 I had the dealer install the Stage one amp and speakers last year. All I can say is that has been a good system. I have had zero issues with it and it sounds great and clear at any speed.
      Date published: 2016-09-27
      • y_2018, m_2, d_26, h_20
      • bvseo_bulk, prod_bvrr, vn_bulk_2.0.7
      • cp_1, bvpage1
      • co_hasreviews, tv_0, tr_13
      • loc_en_US, sid_PA-08-76000278, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
      • clientName_harleydavidson

      Q & A

      Can I use the Boom audio amplifier With the stock speakers on a 2017 Harley Ultra Limited?

      Asked by: Rodney17
      No, you must change to the boom speakers installing phase one or phase two. Depending on which way you want to go some cabling change to your configuration is required, this include a digital tech program and reglas of your Boom radio system. Installing the Boom amp turns off the radio internal/stock amp. Once you go to Boom all must be Boom and they cannot be mixed.
      Answered by: Rick23
      Date published: 2017-04-29

      Connections on 2016 triglide

      Are all the connectors for amp there ? Do you need to run separate power line back to battery or are all the wires there around the radio ?
      Asked by: Dogg
      Hi Dogg--- The Boom! Audio Amplifer Kit will include all parts needed to complete installation. If you are interested, the I-Sheet is available online at USA Hope this helps!
      Answered by: RowdyGrl79
      Date published: 2016-08-17

      will this amp be all thats needed for boom audio stage II fairing speakers and saddlebag speakers

      Asked by: tman81758
      Hey tman81758, To add both Stage II fairing and saddlebag speakers, you need: Fairing Speakers Fairing Amp with Mount Saddlebag Lid Speakers Saddlebag Lid Speaker Install Kit Saddlebag Amp Left and Right Boom! Saddlebag Lids
      Answered by: Rockstar883
      Date published: 2016-04-08

      Is this the only amp I will need if I'm upgrading to stage II speakers , front fairing and saddlebag speakers

      Asked by: tman81758

      Will installing this amp disable the speed volume?

      Asked by: johncpie
      Hello Johncpie, Installation of this kit will not disable the speed volume on your bike. Thank You!
      Answered by: JD34
      Date published: 2015-04-16
      • y_2018, m_2, d_26, h_20CST
      • bvseo_bulk, prod_bvqa, vn_bulk_2.0.7
      • cp_1, bvpage1
      • co_hasquestionsanswers, tq_10
      • loc_en_US, sid_PA-08-76000278, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
      • clientName_harleydavidson

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