I A S U S High Performance Helmet Speaker Headphones with a 3.5mm Earbud Audio Jack Compatible with Most Helmet Comm Systems - The XSound 2.1 R fits in Most Ski, Snowboard and Motorcycle Helmets

I bought a helmet first, and then picked these speakers out to go into the helmet. These are exactly what I wanted, and work great.Only problem I had was that these speakers don't say which one is the right, and which one is the left. So I just made two audio tracks, one that was right only, and one that was left only, and then I played those tracks through the speakers, to make sure I knew for sure which speaker was the right, and which speaker was the left. Then when I knew, I slipped them into the helmet, and it works great.NOTE: One speaker has a short cord while the other speaker has a long cord. The short cord goes to the RIGHT SPEAKER, and the long cord goes to the LEFT SPEAKER.If you have a small player like I do, you can fit the player inside the helmet, or run the cord outside the helmet if you want to have quick access to the player. The reason why I decided to go with a cord instead of Bluetooth, is because Bluetooth can easily lose signal. If you don't want to lose signal, cord is best.

I got these for my Sena 20s.The upside: BIG improvement over the stock Sena speakers. You can hear actual bass sounds and the highs are not tinny. And because they are physically bigger than the stock speakers, ear placement does not seem as critical. I can stick a finger in my helmet and move them around a bit with not much of a change in sound. The stock speaker sound would change much more when I tried that with them.The downside: Well, besides the cost, there is a noticeable loss of FM radio signal strength. I can still get all 10 of my preset stations, but now I get station fade as I walk around and/or turn my head. The speaker wires ARE the antenna, and the right side speaker cable is maybe 2-3" inches shorter than the Sena one, so that must be it, because the wires are routed through my helmet exactly like the Sena wires. Now, they do include about a 2' extension cable with the speakers, so I inserted that between the plug and the Sena and it improved the reception, but the extension is way too long to try to fit it all inside the helmet. I suppose you could if you are really determined, but that's up to you. That's a lot of wiring to be running all over the inside of your helmet.Update: I managed to add the extension cable to my helmet wiring and while it did improve the reception, it's still not like it was with the Sena wiring, so these speaker wires must somehow be different. Maybe they are shielded.So, the end result is great sound at the expense of some FM radio reception. Of course, out on the highway away from cities you will have that anyway, just like in a car. If only they had made the wires a bit longer. It could also be the type of wiring making a difference. Maybe it's shielded or twisted, I don't know. I just know that the stock wires as well as my ear bud wires gave me great reception. No fade at all on any of my preset stations.I attempted to run the right side wire over the top of my head (a tip from Revzilla to improve reception) but it was a tight stretch with no slack at all, and would probably cause a wire break over time. What works best for my Arai full-face helmet is to run it along the lower chin where the rubber seal holds it nicely. It stays tucked in place without any stress or tight bends, and gives me enough slack to pull out the cheek pads without pulling on the wire.

Update 2: Customer service finally got in touch with me and required me to ship the headphones back on my dime so they could be "inspected" for warranty replacement. I never shipped them back and I won't be buying any more of their products. I wish you could do 0 stars.Update: The speaker wires shorted and now sound only comes out of one speaker. The 3.5mm plug and cable is designed so that when you mount a Sena 20S there is too much pressure and the cable is too short. A 1.5" longer cable would solve the problem. You could possibly try to extend the cable with an extension.Below 55mph these things sound fantastic. Theres not a huge amount of bass but they are much much less tinny than the speakers that come with either Sena or Scala Rider headsets. They provide a much fuller immersive sound without destroying the upper registry of hearing. Above 55 they are just OK. Not bad at all, but OK is all any helmet mounted speaker will be at that speed so don't take it as a negative. No helmet mounted speakers are going to provide bass that you can hear at highway speeds, physics won't allow it. These things are at least twice as thick as the Sena speakers and are much heavier. Keep this in mind because they will touch your ears. They come with a large amount of foam spacers and leather covers to keep them clean. I would not buy them again. Customer service has been non-responsive through Amazon. I'm currently waiting for reply contact through their website.