I got the ST900 with the 4 channel… I got the ST900 with the 4 channel Rockford Fosgate Amplifier. As of right now I have a pair of 4 inch 2-way KS series & a pair of 5.25 KS series Kicker Speakers. And it ROCKS !!!! I did a grueling 1.5 months of research before buying. Here are a few of the reasons I choose, Steel Horse Audio. #1. They answered all my questions in good time. And, the answers were verifiable. .. Even after the order when I decided to change form the 2 channel to the 4 channel amp, I had no problems doing so. With no up charge for the change. I made changes & can rightfully say I'm a pain in the rump as a customer. But, they were great about it all. Doing what had to be done to make sure I got the system, "I" wanted. Not what they thought I should have. #2. The system is high quality.. Including the wiring harness they include with the system. You're not going to do better than Rockford Fosgate amps for volume & sound quality. The Kicker KS series, 2-way speakers pump out a lot of sound. And, sound good doing it. The MTX bluetooth controller is top notch as well. To do better you'd have to spend a lot more money for a controller. #3. I've tested the sound quality & volume with and with out the shield. With out the shield I can hear it easily up to 80.. With the shield I can hear it at 90. No problem. And, it sounds good doing it. At 70+ with the shield I could listen to Traffic and enjoy the intricacies of the music. . Which is nice. #4. They offer a veterans 10% discount. And, allowed me to take a 1 minute video of me destroying my old useless boss system to satisfy the trade in offer. Saving me $17 in shipping.. #5. Warranty. The 5 year warranty covers "Everything" in their systems. A number of their competitors say they offer a lifetime warranty in big print. But, if you read the warranty info all the way through. You find that the major components are only covered for at most a year.. And, that after 60 - 90 days if you have a problem with the amp, speakers or controllers, you have to contact the manufacturer.. It's not their problem anymore.. If you have a problem with something in one of the Steel Horse systems in that 5 year time frame. They take care of it. They don't try to pass the buck. So, for me Steel Horse checked all the boxes.. Only problem is I got a pair of the 5.25 & a pair of the 4 inch speakers. When I should have chosen to get 4 of the 5.25 inchers. ha,h,ha.. But, it wouldn't surprise me if they worked with me to fix "my" mistake on that.. So, if you like actual customer service, quality components, a real warranty, and more. Go with Steel Horse Audio. I might just buy another pair of the 5.25 inch speakers. And use the 4 inchers on another bike I have with the Kenwood amplifier. . lol.

RESOLVED My last review was less than positive, but it had nothing to do with the actual system! It was all just a huge misunderstanding and Jessica/ Office Manager was wonderful at helping me resolve it..... The system it's self was great, but it did not work for my bike. I like to wear the super patted helmets and I have super loud Samson fishtails. I will say I could hear the system very clearly bar hopping but not on the highway. The sound on the system was veryyyy clear as well. :)

Steel horse audio is a very poor system… Steel horse audio is a very poor system least the one I got i sent mine back to home for a refund it's been over 2 or 3 weeks they won't answer my calls it kept my money they have my stereo so i do not recommend this to anybody

Looks and sounds great couldn't be more… Looks and sounds great couldn't be more happy. Thanks alot steel horse.