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Overview
Look No Farther
If you are looking for a guaranteed high performance result and no fuss installation, this is the system you want.
Infinity Kappa Speakers
Our absolute favorite speaker system for bolt in and smile results. This speaker system is the nicest sounding setup right out of the box that we have ever encountered. The speakers can be added to a Harley without complex tuning. You simply get an instant jump in output and sound quality by installing them.
Musway M4+ amplifier/DSP
Though these speakers already sound spectacular, processors play a critical role in the performance of all truly high end Harley speaker systems. The optional tune that comes with this speaker/amplifier combination is where the magic happens. Instead of burdening our customers with having to figure out complex tuning on their own, we offer a pre-tune with each system that has dozens of hours of professional wizardry already in them. The Musway M4+ amplifier is ideally matched for power to the Kappa Perfect speakers with the ability to easily drive the speakers to 100% of their mechanical abilities.
The Software
The Musway PC software interface is just beautiful and rock solid. We have auditioned many DSP interfaces over the years and we even consult for may other DSP and amplifier companies, helping them develop better DSP interfaces. So we know what we are doing when it comes to DSP software. The Musway software is a pleasure to work with and one of the very best that we have ever seen. Plus we offer live remote PC assistance if you ever need any help.
Fitment
- 2014+ Street Glide, Electra Glide
- 2015+ Road Glide
- 2014+ Ultra Limited - This kit adds lid speakers and does not include replacement speakers or connections for the tour pack speakers. We do offer those additional parts and options. Call for more information 1(888)311-0016
Warranty
- Musway 1 Year
- Infinity 3 Year
Features
Water Proof
Very High Level Performance
Road Glide
Street Glide
Specifications
Musway M4+ Amplifer/DSP
- 4 x 100/135 Watts RMS @ 4/2 Ω or
- 2 x 270 Watts RMS @ 4 Ω bridged
- 6 x High Level Input
- 2 x AUX/RCA Input, 1 x Optical Input/Stereo
- 4 x Loudspeaker Output amplified
- 4 x Pre-Amplifier Output/RCA (configurable via DSP)
- Dimensions: 220 x 44 x 150 mm, 8.66" x 1.73" x 5.9"
Infinity Kappa Perfect 600X Speakers
- Power handling: 75Wrms, 225W peak
- Sensitivity (@ 2.83V): 93dB
- Frequency Response: 60Hz - 20kHz
- Impedance: 3.0 ohms
Infinity Kappa Perfect 900X Speakers
- Power handling: 75Wrms, 225W peak
- Sensitivity (@ 2.83V): 93dB
- Frequency Response: 60Hz - 20kHz
- Impedance: 3.0 ohms
What's Included
Video: Optional "Make Life Easy Package"
- 1 Musway M4+ Amplifier/DSP
- 1 Pair Infinity Kappa Perfect 6.5" Speakers
- 1 Pair Infinity Kappa Perfect 6x9 Speakers
- 1 Pair Street Glide/Electra Glide Steel Replacement Speaker Grills
- 1 Pair Road Glide Steel Replacement Speaker Grills
- 1 USB Drive with Software, Test Tracks, Installation Articles, Installation Videos
What's Not Included
Must add the following options before adding to cart
- Optional Flash Tool
- Optional Plug & Play Wire Harnesses
- Optional Lid Cut-In Kit
- Optional DSP Tune
Bread Pay

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
Most items ship in 24 hours (83% on average), some items do have a lead time due to manufacturing and tech oversight. All orders are processed and built 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 that sometimes you might have to 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
Some items have a longer lead time due to custom assemblies and requirements for tech oversight before shipping. We do our best to add estimated lead times directly to the product page for these items as well as inform our customers over the phone. All items in an order will generally ship together, so if you have one or more items that have longer lead times the other items in your order will usually ship out as soon as all parts are assembled and inspected. Please do not plan the ride of your life around the estimated shipping times of your stereo equipment :)

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.

ordering from american hard bag is 100% safe and secure
You can rest easy - your personal details are never shared, sold, or rented to anyone either.