To increase the bass response you can cover the bass vent with transpore or micropore tape and then poke through the tape with a needle to create a smaller opening than the original port.On mine the sub bass is non existing, bass is nothing more than average, mids are acceptable like higs. Soundstage and impact definitely sub par.
Did some tip rolling with not big results.
Just don't make the opening too small or you'll get lots of driver flex.