I purchased the iASUS amplifier to boost the volume

The tweeters are sensitive to excessive volume and will make a "clipping" noise if you turn the source up too loud

My intention was to have higher quality sound, richer base, and better overall volume at speed (70-75).

I found that full volume off of an iPhone or iPad is fine, but when you add an amplifier like I did, you can run into trouble.

Quite good sound quality and enough volume to have fun while riding!