ST600 Platinum Motorcycle Speaker System


Speaker Option



Looking for the absolute best in a bar mounted motorcycle speaker system? The ST600 Platinum Motorcycle Speaker System by Steel Horse Audio, featuring Rockford Fosgate® amplification and Kicker® speaker technology, is your answer ... with over 900 peak watts of industry leading, distortion free output and pure full range highway sound, nobody comes close!

  • Over 900 watts of CEA-2006 certified power for top end, best in class sound at any speed
  • Illuminated handlebar mounted controller for play/pause, volume & tracks
  • Connect to any Bluetooth® enabled device for a wireless audio connection
  • Also connects to any standard headphone jack for universal compatibility
  • Choose from an available 2-speaker or 4-speaker option
  • Mount to handlebars or highway bars with the included hardware
  • All-Weather certified for even the harshest weather conditions
  • Industry leading 5-year warranty on all parts and components
  • Made with steel enclosures in a high quality show chrome or satin black finish
  • Designed and built in the USA with only the highest quality components



  • Channels: 2 or 4
  • Max Power (Watts): 900W to 1050W (CEA-2006 Compliant Performance Verification Certificate included)
  • 4 Ohm RMS Output: 75W x 4 Channels
  • Classification:  Full Range Class BR
  • Signal-to-Noise Ratio:  >90dB
  • Total Harmonic Distortion (THD+Noise):  4-Ohm: <1.0%
  • Frequency Response: 20Hz - 20kHz +/-1dB
  • Amplifier Size: 1.53 x 4.25 x 6.75 (in.) 

    View instruction Manual



  • Rockford Fosgate® PBR extreme amplifier
  • Illuminated, weatherproof handlebar mount controller with Bluetooth®
  • KS Series Kicker 4-inch (4") speakers in waterproof housings
  • Rockford Fosgate speaker and amplifier wire kit
  • 3.5mm to RCA cable for optional connection to any standard headphone jack
  • Speaker and controller mounting hardware for 1" & 1-1/4" bars included (Other sizes available upon request)
  • Instruction manual with black zip ties

This is for a complete Steel Horse Audio 4" 900W+ Bluetooth Motorcycle Speaker System.  All you need to provide is your mobile audio device.


Customer Reviews

Customer Reviews

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Product Q & A


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  • Is there a lot of difference in sound quality between the 400 and 600 series

    The ST600 is about 20% louder then the ST400.  The quality on both is great.

  • Can I run 2 saddle bag speakers with the 4 speakers system and can the speakers be adjusted to mount on handlebars that are 1 inch 1/2?

    The 2-speaker ST600 system will come with the 4-speaker amp, so this is a great option.  Running 2 of our front speakers and then 2 saddlebag lid speakers is a popular option and sounds phenominal.  We offer mounting clamps up to 1-1/2" handlebar size upon request.

  • I've used the Boss handlebar systems that claim 400, 600 and 800 Watts, yet all three of those could barely be heard at 75 mph behind a windscreen.. How much loudness difference is there between boss handlebar systems and your speaker systems?

    Unfortunately Boss (and quite a few others) use inflated peak wattage numbers to advertise their speaker systems, when in reality they push maybe 40 watts of true power.  Our systems only use true wattage ratings for great sound at highway speeds, even with straight pipes and no windshield.  The ST600 in particular is CES-2005 certified for wattage and will even rival many bagger/fairing motorcycle speaker systems.  We back this with a 60-day money back guarantee and 5-year warranty.  As a comparison, even our lowest end 200 watt speaker system (ST200) will drown out any Boss system on the market (we take a lot in for trade).

  • Is the amplifier waterproof for frame mounting or needs to be secured in the one of the saddlebags? If the latter, are sufficient wiring lengths part of the system?

    The amplifier is water-resistant but not waterproof (speakers and control are submersible waterproof).  So while it can get some exposure to water, we recommend going in a bag (saddlebag, fork bag, windshield bag, swing arm back, front down tube bag, etc).  There is 10+ feet of wiring included for easy installation in any location.

  • Are the speakers the same between the ST400 and ST600, just different amps?

    The speakers are different to accommodate the wattage difference between these systems/amplifiers.  The ST400 uses a CS version of Kicker speakers and the ST600 uses a higher wattage KS version.

  • Are there any charging requirements for the ST400 or ST600 system? How many amps of power do these systems draw?

    There are no specific charging requirements.  These will work on any motorcycle or power sports application, even scooters and UTVs.  The ST400 will draw about 15 amps of power and the ST600 about 25 amps.

  • does it have a radio feature?

    It does not have a built in radio, but works with any audio device, with or without Bluetooth.  Most audio devices then offer an FM radio option, whether it is a built in FM radio tuner or an app such as iHeartRadio.

  • If I buy a 2 speaker system and decide later I want 4 speakers, can they be added?

    Yes, you will receive the same 4 channel amplifier with the 2-speaker system and can easily add on 2 additional speakers at any time.

  • Do you get a whole lot more sound from 4 speakers? Being that two of them would attach to mustache bars

    You get an average of 15-20% more sound output with 4 speakers, plus a fuller, more surround sound experience

  • 1st how hard to install? 2nd will they attach to 1 1/2 inch handlebars?

    We design all our systems as self install kits.  They only require mounting and a few wire connections.  Installation can typically be completed in an hour or two. You can see a set of the instructions under the 'Product Specs' tab....  The speakers will attach to any 7/8" to 1-1/2" bar sizes.

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