I can hear them compared to the factory! Huge difference, but that doesn’t mean they are huge louder. They are louder but it’s more clear. When I get the kenwoods kfc-c2c and compare them I’ll let you know what I think is better for the mids and highs. The significant improvement in the highs and mids was the door speakers with the dash speakers , they complement each other. Rears are just a filler, I used Polk db552 and they are a great speaker. The only reason I used them is because I had them new in a box , I ordered for another project and didn’t use them. I felt guilty returning them to crutchfield( they are such a nice company, they will bend over backward to help you ) so I just kept them. The Bose doesn’t send much power to the rear speakers.