So i bought half year ago and subwoofer kit 12'' that was pretty much matching etc.
But i bought new sub and amplifier (1000rms sub and amplifier) but i set in in my 40L ported box which is very little for what i needed. Ive done research that my sub recommended size are 36hz~ and 60litres but i have found that a lot of people make bigger boxes than whats recommended so whats yall recommends for port sizes and subbox litres etc. I know some stuff but this box things i have very little acknowledge.