Harley Road Glide Speaker & Amplifier Stereo System Upgrade Part# 15RGSYS1

$1,409.96 $1,389.96

Full Plug and Play Extreme Level Harley Davidson Road Glide Stereo System Upgrade.

This kit comes loaded with all of the parts you need to upgrade your '15 & up Road Glide. This is absolute top level gear and it's all plug and play with the factory radio. So there is no need to track down all of the best components, wire harnesses and installation hardware. It's all included in this kit. 

Extreme Output & the Best Sound Quality

Loud Harley Davidson Road Glide Speakers

Step into the top level of pro audio Road Glide speakers. This kit includes everything that you will need to add Diamond Audio MO75T horns and MSPRO65 mid woofers to your '15 & up Road Glide. This is a whole new level of loud that simply has not been possible up until now. 

Easy Installation

Easy Installation Harley Speakers

We include several parts in this kit that make installation a snap. Included is a quick disconnect harnesses for each of the horns and crossovers. The included speaker grills snap right in place of the original factory grills. Each horn comes with a CNC machined HDPE back plate. All fasteners are stainless steel. The woofers are plug and play with the factory Harley speaker wiring. 

IP65 Marine Grade Speakers

Waterproof Harley Davidson Road Glide Speakers

These speakers are designed to take all of the weather that you can throw at them. They are treated for extreme UV exposure, extreme swings in temperature, high vibration, and water.  

Included in This Kit

  • 800 Watt Diamond Audio HXM800.4D 4 channel amplifier
  • 6.5" Diamond Audio MSPRO65 pro audio woofers
  • Dual stage Diamond Audio MO75T compression horn tweeters 
  • Stamped steel, powder coated Road Glide speaker grills with horn provisions
  • 8 gauge OFC amplifier power kit for Harley Davidsons
  • '14 & up Harley factory radio signal interface harness
  • '14 & up Harley factory speaker pod interface connectors with extensions
  • Stainless steel mounting hardware
  • Neoprene speaker gasket
  • CNC machined HDPE horn mounting rings 
  • Pre-wired OFC tweeter extensions with serviceable quick disconnects 

The Magic Compression Horns

The Diamond Audio MO75T is a dual stage horn design that has a much smoother sound than what is normally possible. The full format diaphragm is large and robust which allows for extreme level output volumes. The magnet in these horns is actually in front of the diaphragm and the voice coil is on the front side of the diaphragm which is genius and allows for a much more compact horn design that easily fits in front of the midrange. 

Bold Pro Audio Mid Woofers

The Diamond Audio MSPRO65 6.5" woofers are a big improvement on all other pro audio type mid woofers on the market. These woofers have a better bottom end response. Other popular pro audio woofers sound notoriously thin on the bottom end. Diamond used a convex cone geometry that increases cone rigidity under load while keeping the moving mass down. This makes the speaker louder and better sounding. 

Installation Note: The factory speaker pods in the fairing require a light modification for magnet clearance. Simply heat the plastic speaker pod with a heat gun around the area where the magnet touches and screw the speaker in place. The plastic will then conform to shape allowing the speaker to fit perfectly. 

12db Crossovers Add a Lot to Performance and Reliability

Most all horns on the market come with 6db caps for crossovers. Those type of crossovers have a lot of problems though. The sound of a horn using just a cap changes dramatically with volume, making it impossible to tune your system to sound equally as good at high volume as lower volumes. The crossovers included in this kit though are 12db crossovers with a much higher power handling and a much more stable output at all volume levels. 

Diamond Audio HXM800.4D 800W RMS 4 Channel Amplifier

4 Channel Harley Amplifier Diamond Audio HXM800.4D


This is our favorite amplifier for high power Harley systems. With 800 watts of power and 4 channels of output this amplifier can be dedicated to just the fairing speakers so that the horns have their own level adjustment or it can be configured to run both the fairing speakers as well as rear speakers. In either configuration there is more than enough power on tap to reach well into insane output levels. 

This amplifier is very different from other amplifiers that claim the same type of power levels. The HXM800.4D has a lower noise floor, balanced inputs, and a much more refined internal power supply that is friendly to your bikes charging system and keeps high frequency distortion away from the speakers that we so commonly see in other amplifiers on the market. 

Installation Note: This amplifier fits perfectly under the radio and above the headlight using the included amplifier mounting pad. The front two plastic tabs on the headlight must be trimmed off for clearance. These two tabs are there to hold the factory wire harness in place and are not structural in any way. 

OFC Premium 8 Gauge Power Harness

 Harley Davidson 8 Gauge Amplifier Power Harness

The included power harness is 100% OFC (oxygen free copper). The ANL fuse holder is waterproof and install friendly. The power cables have been pre-terminated, heat shrunk, and loomed for you. This makes for a beautiful installation every time. 

Factory Radio Signal Interface Harness

Harley Davidson Radio Signal Harness with RCA Connectors
We include our own radio signal harness that is not only plug and play but it also properly loads the factory radio amplifier and dramatically improves volume range and lowers distortion. When using this harness the audio signal from the factory radio is actually better than what you get from an aftermarket radio. The voltage is higher and the signal is balanced instead of single ended (that's good!). 

Plug and Play Speaker Pod Connectors with Extensions

Harley Davidson Fairing Speaker Pod Connectors
Don't cut any wires! we include plug and play connectors for the factory speaker pods in the fairing. This makes the installation easy. Simply plug into the pods and connect the speaker wire extensions into your new amplifier. 

Neoprene Speaker Gasket

Harley Speaker Gasket
It wouldn't make any sense to install the best speakers without properly sealing them into the speaker pods. So we include a simple but special gasket that we have manufactured just for speakers in Harley Davidson applications. The adhesive and the neoprene rubber maintain integrity for years in extreme temperatures. 

Specifications - Woofers

Power Rating: 200 W RMS/ 400 MAX
Sensitivity: 97dB 1W/1M
Frequency Response: 110Hz-10k Hz+/-3dB
Nominal Impedance: 4 ohm
Mounting Depth: 2.375"
Cut-out Diameter: 5.625"
Over-all Diameter: 6.5"
Over-all Height: 2.5625"


Specifications - Compression Horn Tweeters

 Overall Diameter 2.28"
Cut Out Diameter 1.61"
Over All Depth 2.0"
Mounting Depth 1.12"
Sensitivity  106 db 1W/1M
Frequency Response 2k - 20k
Nominal Impedance 4 Ohm
Power Handling

50W RMS / 100W Max

Included Crossover


Rebuildable Diaphragm 


Amplifier - Specifications

    RMS Power Rating

    • RMS Power (2Ω):  200 W X 4  
    • RMS Power (4Ω):  120 W X 4  
    • Bridged (mono 1Ω): N/A
    • Bridged (mono 2Ω): N/A
    • Bridged (mono 4Ω): 400W X 2 (4Ω ONLY)


    • Topology: Full Range Class D

    Power Supply

    • Power Supply: Full PWM
    • Power Supply Threshold: 10.0VDC-17.0VDC
    • Idle Current: (0.7A)


    • THD (1KHz@4Ω) : 0.07%
    • S/N Ratio(A weighted@1W): -77.4dBA
    • S/N Ratio(A weighted@FP): -97.4dBA

    Input Sensitivity

    • Low Input Level: 0.2mV-10.0V
    • High Input Level: Yes - Up to 25W RMS

    Input Impedance

    • Low Input Level: 22 KΩ
    • High Input Level:

    Output Stage

    • Output Impedance: 0.047Ω 
    • Damping Factor (50Hz@4Ω): >250
    • Bandwidth (-3dB): 10Hz-35KHz

    Crossover(@12dB per Octave)

    • Variable High-Pass: 40Hz - 400Hz 
    • Variable Low-Pass: 40Hz - 400Hz
    • Variable Sub-Sonic: N/A

    Recommended Fuse Rating

    • ATC: N/A


    • Length x Width x Height (Inches): 9.3 x 5.27 x 1.75
    • Length x Width x Height (mm): 237 x 133.9 x 44.5
    Shipping This Item Ships to The United States 

    Items built to order have a build time of up to two weeks before shipping. Items that are not built to order (e.g. amplifiers, speakers, .etc) typically ship in 2 - 3 business days. Many of our speaker kits feature machined special parts and customized wire harnesses that are built to order. We process and build orders in the order that we receive them. This allows our experts to go over every order and check that your particular order is correct for your particular bike. This means sometimes you have to wait a little longer to get your order but it's always worth it! 

    Once You Order Does Ship

    You will receive an automated email with tracking information as soon as our shipping department creates a shipping label for your package.  


    There are many more speakers, amplifiers, and kits to choose from than what you see here.

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    Please allow 10 business days for your order to arrive if it is an item that is built to order. Items that are not built to order (e.g. amplifiers, speakers, .etc) typically ship the next business day.We process and build orders in the order that we receive them. This allows our experts to go over every order and check that your particular order is correct for your particular bike. This means sometimes you have to wait a little longer to get your order but it's always worth it! 

    Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! You can find our refund policy here.

    Here are 5 great reasons to buy from us:



    Easy Returns

    Returns are easy, simply contact us for a return Authorization number and send your item to our returns center for fast processing. We'll get you a replacement or refund in a snap! You can find our refund policy here.



    Your part is guaranteed to fit. We test fit every part we sell on actual bikes in order to verify fitment on each model, generation, and in each possible location. You can be sure that if we have stated that a part fits your bike, that it will, or your money back. You will find model, year, and location fitment details on most product pages.

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    Register as a member and get $100 off qualifying orders of $1,500 or more that are financed through SNAP(our kickass finance company). $100 comes right off the total of your order. Orders under $1,500 still qualify for 100 days same as cash with no credit needed. 


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    Important Note: In order to take advantage of our $100 member discount on financed orders you must register a user account. Members with a user account also enjoy member only benefits such as free shipping and free product upgrades. See details on your account page.

    Finance Up to $3,000 Today and Shop Right Away

    American Hard Bag has teamed up with Snap Financing to offer our customers a 100 day same as cash financing option. We have found this to be a great program. We advise you to pay off your purchase within 100 days to take advantage of $0 in fees. We cover the financing fee as long as you pay your purchase off within the 100 days. After that point fees will apply.  

    American Hard Bag Financing

    No Interest & You Pick Your Payments

    We pay your initial SNAP processing charge for you. There is an initial charge that SNAP has for running the application, but we cover that charge entirely for you when you make your purchase. SNAP gives our customers 100 days to pay and not incur any fees or interest. So your entire purchase is "Same As Cash". No hidden fees.

    No Credit Needed & No Hard Credit Inquiry

    Snap has an 80% approval rate. It's simple. If you have had a job for 90 days or more, have a checking account in good standing, and make more than $1,200 a month you should qualify. You never have to worry about your credit score being affected by applying. So there is nothing to lose except a great opportunity. 

    Up to $3,000


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    Bad Credit, No Credit, OK!

    Snap Finance provides easy financing for people with good or bad credit just the same. Even if you have no credit, Snap is a great way to finance the things you need. It’s not a traditional loan, but a consumer lease that spreads out your purchase over 100 days.

    We don’t pull credit from the main credit bureaus (CRAs)- because that actually can hurt your credit! And our finance experts are here to help. What does that mean to you? Even with a low credit score, you have a great chance of being approved with Snap! Don’t let no or bad credit stand in your way anymore.

    High Credit Limits

    Not only do we offer high approval rates, we offer high approval amounts as well. So if you have a job and good banking history, apply today to see how much you qualify to receive. Once approved we’ll set up easy automatic payments which makes owning the new audio system for your Harley or upgrading your existing system a breeze. Don’t let your credit history stand in the way. 

    All you need to begin a new application is:

    • Be at least 18 years old
    • Have a steady job with reliable income
    • Have an active checking account

    $450 is the minimum amount that can be financed. 


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    Got Questions? 

    Call American Hard Bag and we can help to see if Snap Finance is right for you! 1(888) 311-0016