I just got a 2020 roadglide. Got the stinger 700.4 and 4 mmats 6.5. Fairing and lowers. I also already have front and rear biketronics line levelers. Is the dsr1 really needed/worth it? I’m not entering competition just want louder & better music at highway speeds as I do cross country riding.

 

Stick with the BT. Sometimes simpler is better

 

You are running the same speaker in both locations so you shouldn't have any tuning issues. You should be fine without a DSP.

 

I'm running the same set up only in a 14 Limited and it sounds great. Would a DSP sound better? Probably but for me I'm good with the line levelers.
I did tweak them some after reading a few threads here. This one was one of the more informative. https://www.hdforums.com/forum/audio...bt355-loc.html. All in all I am very happy loud and clear sitting or at speed with all types of music.

 

I have a similar set up on my ultra. Same speakers in all 4 holes, but I chose DSP versus line levelers as I want to add lid and maybe lowers in the future.