Alright heres my question which svs sub would be a notch above my adire audio tempest that i built. The tempest is seeing 7.8 cubic ft after displacement and is tuned to 15.4hz. I used one of adires alignments. I am using 2 3inch flared ports for it. The sub is powered by an akai aa-1200 receiver from the 70s. The receiver is awesome and has no problems pushing the tempest to full output. If you know which one would be a step above my tempest please post. Thanks.