Sorry tumpang thread sikit. Seems like you guys have more experience than me

I currently have a cheap 10 inch Edifier installed in my boot: https://www.lazada.com.my/products/edifier-...ExoCNtYQAvD_BwE

Does adding a underseat woofer helps to improve the bass?

Also, I feel like sometimes my 10 inch woofer bass becomes less boom boom over time. Is this normal? Or is it because my woofer is falling apart? Only used for 6-8 months so far

Thank you in advance!

Thank you for the reply! Where to check phase ah?

Aahhh thank you! What number should it be? Should it be all the way up?