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Kuryakyn Road Thunder Plus Sound Bar – Satin Silver
Most handlebar-mounted speakers are an afterthought. Low power, tinny sound, and the first rainstorm turns them into a paperweight. The Road Thunder Plus is built by MTX — a company that actually knows audio — and it shows from the first ride.
300 watts of peak power runs through a four-channel internal amp pushing two 2" x 3" full-range speakers with dual voice coils. Four 1" silk dome tweeters handle the high end, and they do it cleanly. No distortion at higher volumes, no thinning out when the road noise picks up. Riders who've run these back-to-back against cheaper handlebar speakers describe it as a completely different experience — not just louder, but fuller and clearer at speed.
The IP66-rated housing keeps water out in the kind of conditions you actually ride in. A built-in heat sink and self-protection circuit manage excessive heat and voltage swings so the electronics don't cook themselves on a long summer run. These aren't just weather-resistant in name — the rating is there to back it up.
Bluetooth 3.0 connects wirelessly to your phone or music device. If you prefer wired, the 3.5mm auxiliary input handles that too. The auxiliary output lets you chain in an external amp or a second sound bar if you want to expand the system later. A 1-amp USB charging port sits in the end cap for keeping devices topped up on the road. Power, ground, and ignition wires come included with a connector for a clean, easy disconnect when needed.
The mounting clamps are universal and articulating — they fit handlebars from 7/8" to 1-1/2" in diameter, which covers the vast majority of cruiser and touring bar setups. The satin silver finish works well on chrome builds and lighter-colored bikes without the starkness of polished chrome.
Features at a Glance
300-Watt Peak Power — four-channel internal amp with serious output for road use
Two 2" x 3" Full-Range Speakers — dual voice coils for cleaner, fuller sound across the range
Four 1" Silk Dome Tweeters — distortion-free high-frequency output at any volume
Bluetooth 3.0 — wireless connectivity to any Bluetooth-enabled phone or device
3.5mm Auxiliary Input — wired connection for standard devices
Auxiliary Output — expands the system with external amps or additional sound bars
IP66-Rated Weather-Resistant Housing — built for real riding conditions, not just light mist
Built-In Heat Sink and Self-Protection Circuit — manages heat and voltage regulation
1-Amp USB Charging Port — built into the end cap, keeps devices charged on the road
Universal Articulating Clamps — fits handlebars from 7/8" to 1-1/2" diameter
Includes Wiring Harness — power, ground, and ignition wire with quick-disconnect connector
Specs
Part Number: KUR2719
Color: Satin Silver
Type: Sound Bar
Peak Power: 300 Watts
Amplifier: Internal 4-Channel
Speakers: Two 2" x 3" Full-Range, Dual Voice Coil
Tweeters: Four 1" Silk Dome
Bluetooth: Version 3.0
Aux Input: 3.5mm
Aux Output: Yes
USB Charging: 1.0 Amp
Weather Rating: IP66
Bar Diameter Fitment: 7/8" to 1-1/2"
Finish: Satin Silver
Frequently Asked Questions
Will 300 watts actually cut through wind and road noise at highway speed?
At highway speeds, wind noise is the real enemy of any handlebar speaker system. The Road Thunder Plus handles it better than most in its class thanks to the four-channel amp and silk dome tweeters, but getting the most out of it at speed comes down to aiming the speakers correctly and setting the EQ on your source device. Riders who've dialed in the placement report hearing it clearly well past 70 mph.
My phone volume seems to limit the output through Bluetooth. Is that normal?
Yes, and it's a known characteristic of Bluetooth audio on this unit. The Road Thunder Plus is only as loud as the signal coming in. If your phone's Bluetooth output seems low, a volume booster app from the App Store or Google Play can help push the signal higher before it reaches the amp.
Can I add a second sound bar or external amp to this?
Yes. The auxiliary output port is specifically there for that. You can run a second sound bar off the output or connect an external amp to expand the system without replacing the unit.
Does the IP66 rating mean it's fully waterproof?
IP66 means it's protected against powerful water jets from any direction — that covers heavy rain and road spray without issue. It's not designed for submersion, but for every normal riding condition you'd actually encounter, it holds up.
Will the mounting clamps fit my stock handlebars?
The universal articulating clamps fit bars from 7/8" to 1-1/2" in diameter, which covers the stock handlebar size on the vast majority of cruisers and touring bikes. Measure your bars if you're unsure — most stock V-twin cruiser bars fall right in that range.
Does this come with everything needed for installation?
Power, ground, and ignition wires with a quick-disconnect connector are included. You'll need basic hand tools to mount the clamps and run the wiring, but there's no hunting for additional hardware to get it on the bike.
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