Nightshade 18'' tuning

[Bobby32 0]

I miss calculated on my port and I am tuned to 29Hz instead of 32Hz. My box is ~5.3 cubes after displacements, I have 20.5'' of port (13.5'' in the box and 7'' out). I am going to cut the port down at the top. Will I notice an audiable change? I mostly play decafs chopped/screwed songs and I dont think they dip under 30hz, if they do its only breifly. Is 29 too low for a nightshade? Its ran off an AQ2200 @ 1 ohm

[KU40 173]

You may notice a small change.

[Bobby32 0]

Well theres a big change in port length. 20.5'' to 16''