u/AffectionateEvent147

Image 1 — Quad 18 sealed sub diy
Image 2 — Quad 18 sealed sub diy
Image 3 — Quad 18 sealed sub diy

Quad 18 sealed sub diy

These drivers have lived a life in pa before in a ported enclosure as dual 18s.(thomann tp218)
The pink graph is before eq whole system (i know its not optimal)
Yellow is eqed
And the blue in the background was my setup before with one dual 18 eqed by ear

Not the prettiest but it plays more precisely in my opinion than the ported enclosure.