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Overview
Ultimate Sound in a Compact Design with High Power Speakers and Amp For All 2015 and Newer Road Glides
Ready for a compact and powerful system for your Harley? We’ve got you covered with our new Hertz-Arc Audio Combo that fits all 2015+ Road Glides. This combo boasts spectacular out-of-the-box sound without requiring complex tuning, a fuller-sounding bottom end than pro audio type speakers, and silk dome tweeters that have better sound quality than horn-type speakers. Best of all, it has bolt-in, drop-in fitment!
Arc Audio’s KS 125.2 Full Range Mini Amplifier has a bass frequency extension technology that provides increased perceived bass frequency response below the low-frequency cut-off in an audio system. BX2 uses the principle of the missing fundamental, which creates the sensation of low frequencies by generating a carefully calculated series of harmonics designed to simulate the auditory experience in the human ear caused by the missing fundamental pitch.
When paired with the MPK 165.3 Speaker Upgrade Kit from Hertz, you have a system that produces crisp highs and beefy lows, clear enough to hear at high speed running down the freeway.
Fitment
- Compatible Year - 2015+
- Compatible Model - Road Glide
- Location - Fairing
- Additional Adapter Required - No
- Modification Required - No
- Plug & Play - Yes
- Works with Electric Lid Locks - N/A
Warranty
- Hertz Audio Components: 1 Year
- Arc Audio Components: 1 Year
- American Hard Bag Components: 5 Years
Features
Water Resistant
Very High Level Performance
Road Glide
What's Included
- (1) Hertz MPK 165.3 Speaker Upgrade Kit
- (1) Pair Road Glide Specific Tweeter Mounting Brackets
- (1) Arc Audio KS 125.2 BX² Mini Full Range Amp
- All Applicable Manuals and hardware
MPK 165.3
Product Overview
Step into high-volume sound with smooth silk dome tweeters. This speaker kit is designed to fit under your factory speaker grills and does not require any modification to your speaker pods or your bike's wire harness. This speaker upgrade kit is perfect for anyone who has extremely high sound quality expectations but still wants to be able to play loud.
Technical Specifications
- Power Handling - 220w
- Continuous Power - 110w
- Impedance - 4ohm
- Frequency - 40 ÷ 22,5k
- Sensitivity dB SPL - 92
- Voice Coil - 25 (1)
- Woofer Size - 6.5"
- Tweeter Size - 1.14"
- Crossover Type - 2 Way Passive Crossover
- Crossover Cutoff - 3,5 kHz
Features
- V-cone® and Boundary Free Surround technologies
- Dedicated crossover MPCX 2.3 designed to exploit the wide extension of the MP 165.3 woofers
- 1mm low parasitic resistance copper filter coil
- High-density flux ferrite woofer magnet
- Neodymium tweeter magnet
- Pressed-pulp cone with cotton fibers woofer cone
- Tetolon tweeter cones
KS 125.2 BX²
Product Overview
BX2 technology allows the system user to experience dramatically improved levels of system performance, sound quality, and improved low-frequency response by:
- Increasing low-frequency output and performance without causing the speakers to perform outside their physical design limitations.
- Decreasing power consumption during low-frequency reproduction up to 75%.
- Allows small format speakers to reproduce low frequencies traditionally designed for larger speakers.
Technical Specifications
- 2- Channels @ 4 Ohms - 70w
- 2-Channels @ 2 Ohms - 125w
- 1-Channel @ 4 Ohms (Bridged) - 250w
- Frequency -5Hz - 20kHz
- Crossover Range - 50Hz - 550Hz
- S/N Ratio - 101dB
- Input Sensitivity - 170mV - 3.5V
- Fuse - 1 x 30 Amp
- Dimensions - 8.25"(L) x 4.8"(W) x 1.7"(H)
Features
- The KS125.2BX Mini Exclusively Incorporates ARC Audio’s BX2 Low-Frequency Enhancement Technology. The BX2 Technology Gives You Big Bass And Improved Low-Frequency Response Without The Additional Physical Demand On Your Speakers.
- The KS125.2BX Mini Uses A High-Velocity Forced Induction Fan For Additional Cooling.
- Bridge Auto Detect Mode (Autosense Turn On).
- Class G/H Switching Design
- Protection Against: Reverse Voltage, Speaker Short, And Thermal Overload.
- Wide Band Over Voltage Protection Allows For Continued Use Without Interruption From Very High Voltage Spikes
- Optically Isolated Mosfet Power Supply.
- Stable to 2-Ohms Stereo.
- Ultra-Low Radiated Noise for Clean AM/FM/ Reception
Fairing Mounted Amplifier Power Kit
Product Overview
This powerful amplifier kit comes complete with all the cabling, speaker wires, terminals, disconnects, and fuse blocks needed to perform a quality installation, except for RCA interconnects.
Features
- Waterproof eight gauge fuse holder that uses MIDI-style fuses
- Fuse holder is compact and very friendly to mount
- Comes with a large hook and loop mounting pad
- Includes load resistors to prevent distortion and damage
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.