Boom! Audio Stage II Amplifier

    Part Number 76000277B





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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 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
    • 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


    • Water Resistant

    • Warranty

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

    • In The Box

      Amplifier Only
    • Class

      Class D


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    Fits '14-later Touring and Tri Glide™ models equipped with a Boom!™ Box audio system. Required to add a 2nd, 3rd or 4th set of speakers. Dealer Digital Technician software update is required. Dealer installation is recommended.

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    Boom! Audio Amplifier is rated 2.5 out of 5 by 11.
    Rated 5 out of 5 by from Excellent product!!! This amp paired with the Stage II audio speakers is GREAT! The difference is night and day compared to the stock OEM speakers. I highly recommend that you get the work done at your local Harley Davidson dealership.
    Date published: 2018-02-21
    Rated 5 out of 5 by from Works fine. The stage 2 kit output is very clear. The dealership installed the kit. The extreme bass of some alternative music is lacking without a 10"+ sub woofer. Excellent system for rock.
    Date published: 2017-11-01
    Rated 5 out of 5 by from No Problems Dealer installed four stage two speakers and two stage two amps. I have yet to upgrade my charging system. Plays loud and clear for the last year and a half. Most people are thrown back by the noise it puts out. Sounds great at 90mph. Most radio sounds better than mp3 files. Integrates seamlessly with Nav/Phone/CB. Blasted through 7000 mile trip from Dallas to Maine and back. Sits outside 100% of the time. All systems work excellently!
    Date published: 2016-09-10
    Rated 1 out of 5 by from Very expensive downgrade Was always happy with stock Boom audio stereo on my 15 street glide special, but wanted more, had dealer install stage II speakers and Amp, sounds good with motor off at a quarter volume, but now at highway speeds can hardly hear at full volume, and doesn't sound anywhere as good as stock at full volume, haven't gone back to dealer yet, but am and hopefully they can get it working like it should,
    Date published: 2016-07-31
    • 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_11
    • loc_en_US, sid_PA-08-76000277A, 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 add this amp to my 2018 street glide special to power the fairing speakers? Or do I have to upgrade the speakers

    Asked by: Topspd7

    Boom audio 2 problems

    I have see slot of bed reviews about this upgrade to my ultra. Has Harley fixed the problems?
    Asked by: Phil68

    Harness and fairing mount

    Can you purchase a seperate fairing eletrical harnees and mount for this amp.?
    Asked by: djcoss

    will this work with the current setup on a 2016 FLHTK

    just bought a new 2016 FLHTK. will this work with the boom audio system it came with?
    Asked by: aaronbrill
    Hi Aaronbrill, If your bike has the Boom! Box 6.5GT---you can use the Boom! Audio Amplifier. Thanks!
    Answered by: RowdyGrl79
    Date published: 2016-08-17

    Do I need to buy this for my 2016 CVO Limited?

    I would like to upgrade the speakers and therefore I want to know if I need to add this amplifier. As far as I know the bike should already come with at least one.
    Asked by: enriavil
    Hi Enriavil, If you are planning to upgrade the speakers on your 2016 CVO Limited--a new Boom! Audio Amplifier is suggested. Yes, there is a built in amplifier on your bike; however, it may not give you the quality expected from your new speakers. A new amplifier will provide you with less distortion and optimal sound. Hope this helps!
    Answered by: RowdyGrl79
    Date published: 2016-08-16
    • y_2018, m_2, d_26, h_20CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.7
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_14
    • loc_en_US, sid_PA-08-76000277A, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_harleydavidson

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