If your getting your music through the bikes audio system, nothing is going to upgrade the sound quality.

If you want incredible sound quality stream your music directly from your phone and switch to IEM's like Sensaphonics.

 

I switched my Sena helmet speakers for these https://www.amazon.com/Tork-X-Pro-Motorcycle-Speakers-Control/dp/B004I6HOQA/ref=sr_1_2_sspa?crid=2W750C4XFLDFG&keywords=tork+helmet+speakers&qid=1562447718&s=gateway&sprefix=torks+helmet%2Caps%2C206&sr=8-2-spons&psc=1&smid=A34JWT04R7KMFW
The bass is much better than the Sena speakers and the overall sound quality is pretty good for helmet speakers. Expensive ear buds are the best but for the money and convenience I like these.

You will need a Sena adapter which will work for after market speakers as well as ear buds. https://www.amazon.com/Sena-10R-A01...earbud+adapter+cable&qid=1562447855&s=gateway&sprefix=sena+earbu,aps,189&sr=8-2


By the way I listen to XM radio and my iPod through my bikes system with an SM10 and Motochella tapped into the bikes speaker wires.

 

I swapped the Sena for the Iasus speakers and their amp. I dont wear a face shield on my AGV Sportmodular so have trouble hearing at speed. I have tried many different speakers and the Iasus with their amp finally works great for me. The amp is very small and light with incredible battery life. amp just velcros next to Sena. Here is their Micro Amp-
EAR3 Micro AMP - IASUS Concepts

 

I want to thank you all for your input on Sena speakers replacement, always good to learn more about what other rider's are doing with the same issues.