help with DAyton 6.5 In

[JORGETronic]

Hi everybody, I need your expert help with this woofer.
I have builded a Bass reflex box, Vol= 16 litres, L=20 cm.
I have not clear what BOOMY means but my box sounds really bad,
I was playing with stuffing with no good results.

Any suggestion

Saludos

 

[JORGETronic]

just to define a little bit more, sounds like a plastic drum