if a speaker is not made to hit those frequency it just won’t play them. won’t cause damage

a 6.5 will never properly play at 20 hz anyways.

there are some audio shops in the Uk that have been just replacing speakers with stock amp and running new sub as part of their entry builds with no issues


i considered this build as a start with plans to upgrade. the 2 ohm speakers makes things tricky and usually have inferior sound quality to a 4 running an aftermarket amp