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Overview
This kit comes loaded with all of the top-level gear you need to upgrade your 2014+ Road Glide amplifier and fairing speakers. This is the perfect setup to pair with your favorite lid speakers.
We Tune Your Bike for You
All Live-Tune enabled systems can be remotely tuned via the internet by one of our professionals. We can tune your bike from anywhere in the world. Why settle for anything less than the best? Our techs set these systems up every day and have tuned thousands of bike audio systems over the years.
Read More About The Live Tune Option Here
Product Description
- Steel Speaker Grills with Horns Mounted
- We stamp and mount the RZ75H horns for you. Black coated stainless steel fasteners are used, and a CNC machined HDPE backplate so that the speaker grills match the integrity of the rest of the bike.
- 12db Crossovers Add a Lot to Performance and Reliability
The crossovers included in this kit are 12db crossovers with a much higher power handling and a much more stable output at all volume levels. - Factory Harley Radio Interface for Front Signal Included
Plug-and-play connections are included with this amplifier. The Helix M Four DSP amplifier has an advanced radio load compensation circuit built-in. - Factory Harley Accessory Power Interface Included
There is no need to cut into the factory radio harness to get accessory turn-on power. A plug-and-play connection and cable are included. - Premium 8 Gauge 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. Comes with a mounting pad making for a beautiful installation in the fairing every time. - Plug and Play Speaker Pod Connectors with Extensions|
Don't cut any wires! We include plug and play connectors for the factory speaker pods in the fairing. This makes the installation easy. Plug into the pods and connect the speaker wire extensions into your new amplifier. - Neoprene 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 unique but straightforward 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.
Fitment
- Compatible Year - 2015+
- Compatible Model - Road Glide
- Location - Fairing
- Additional Adapter Required - No
- Modification Required - Yes, Headlight and pod modification required - Grinf headlight mounting tabs back to mount to allow clearance for amplifier, pod modification with heat gun to allow clearance for magnet
- Plug & Play - Yes
- Works with Electric Lid Locks - N/A
Warranty
- Helix Components: 2 Years
- Diamond Audio Components: 1 Year
- Velocity Components: 2 Years
- American Hard Bag Components: 5 Years
Features
Water Resistant
Extreme Level Performance
Road Glide
What's Included
- (1) Helix M FOUR DSP 4-Channel Amplifier with Integrated 10-Channel DSP
- (1) Pair 6.5" Diamond Audio MSPRO65 pro audio woofers
- (1) Pair Dual-stage Velocity RZ75H compression horn tweeters
- (1) Pair Stamped steel, powder-coated Street Glide speaker grills with horn provisions
- (1) 8 gauge OFC amplifier power kit for Harley Davidsons
- (1) Set '14 & up Harley factory radio signal interface harness
- (1) Set '14 & up Harley factory speaker pod interface connectors with extensions
- (1) Set Neoprene speaker gasket
- (1) Set CNC machined HDPE horn mounting rings
- (1) Set Pre-wired OFC tweeter extensions with serviceable quick disconnects
MSPRO65
Product Overview
Bold Pro Audio Mid Woofers
The Diamond Audio MSPRO65 6.5" woofers have a better bottom-end response and use a convex cone geometry that increases cone rigidity under load while keeping the moving mass down.
Technical Specifications
- Model: MSPRO65
- Power Rating: 200 W RMS/ 400 MAX
- Sensitivity: 97dB 1W/1M
- Frequency Response: 110Hz-10k Hz+/-3dB
- Nominal Impedance: 4ohm
- Mounting Depth: 2.375"
- Cut-out Diameter: 5.625"
- Over-all Diameter: 6.5"
- Over-all Height: 2.5625"
RZ75H
Product Overview
Magic Compression Horns
The Velocity RZ75H is a dual-stage horn design with a much smoother sound and the full format diaphragm is large and robust. The magnet is in front of the diaphragm, and the voice coil is on the front side of the diaphragm.
Technical Specifications
- Model: RZ75H
- Overall Diameter: 2.28"
- Cut-Out Diameter: 1.61"
- Over-All Depth: 2.0"
- Mounting Depth: 1.12"
- Sensitivity: 10 dB 1W/1M
- Frequency Response: 2k - 20k
- Nominal Impedance: 4ohm
- Power Handling: 50W RMS / 100W Max
- Included Crossover: 12db
M FOUR DSP
Product Overview
Helix M FOUR DSP 4-Channel Amplifier with Integrated 10-Channel DSP
The Brand New Helix M FOUR DSP is a powerful 4-channel amplifier with a fully integrated digital sound processor that brings a continuous output of 135 Watts per channel, both at 4ohms and 2ohms.
Technical Specifications
- Model: M FOUR DSP
- Power RMS: @ 4ohms: 4 x 135w; @ 2ohms: 4 x 135w; Bridged @ 4ohms: 2 x 270w
- Amplifier Technology: Class D
- Inputs: 6x RCA, 6x High-level speaker, 1x Optical SPDIF, 1x Remote In
- Input sensitivity: RCA 1-4 V, Highlevel 5-20 V
- Input impedance RCA: 22kOhms
- Input impedance high-level: 9-33ohms
- Outputs: 4x Speaker, 6x RCA, 2x Remote Out
- Output voltage RCA: 6 Volts RMS
- Frequency response: 20 Hz-22,000 Hz
- DSP resolution: 64 Bit
- DSP power: 295MHz
- Sampling rate: 48kHz
- DSP Type: Audio signal processor
- Damping factor: 100
- Operating voltage: 10.5-16 Volt (max. 5 sec. down to 6 Volts)
- Additional features: ADEP.3 circuit, Auto Remote switch, 32 Bit CoProcessor, Control Input
- Dimensions (H x W x D): 2.0” x 9.06” x 6.06”
Bread Finance

Flexible buy now and pay later financing with split-pay option
Snap Finance
Perfect way to pay within 100 days with no credit history required and no hard credit check. We cover the financing fees for you as long as you pay off your purchase within 100 days. So there are no hidden fees. Apply without any impact on your credit score.

100 Day same as cash financing
Shipping information
Usually ships in 2 to 3 business days. We process and build orders in the order in which they are received. This allows our experts to review every order and check that it is correct for your specific bike. This means sometimes you might wait a little longer to receive your order but it’s always worth it!
Returns information
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.
Lead Time
Lids have up to a two-week lead time. Often we have these lids in stock, and they ship in just a few days but plan on two weeks to be safe.

Easy Returns
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 return 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 moden, 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.

We thoroughly test every part we sell on a real bike
There are a lot of parts out there that we refuse to sell. If it’s not up to our high standards, it never makes it to this website. We have parts that fit various budgets and levels of insanity, but all parts we carry are exceptional performers.

WE ARE FULLY AUTHORIZED RETAILERS FOR ALL BRANDS WE SELL
There are only a select few authorized online retailers for the brands we sell. Most all online retailers (even the really big ones) are not authorized at all! And the manufacturer’s warranty is void before you even get your items.

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You can rest easy - your personal details are never shared, sold, or rented to anyone either.
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