Well I'm considering building another enclosure for my Tempest sub. I am not as impressed with my EBS Tempest as many others here seem to be with their design. It is about 360L and powered by an AVA250, and tuned to 16 hz. I have to have both my receiver and the plate amp turned up about 3/4 or more and it is still not enough for me. I have to leave the room to realize just how much bass it is pumping out! Is this normal for this alignment?? I realize the EBS won't give me a punchy type bass so I'm considering starting a second box, probably the Adire Alignment 214L. So I am curious, just how much different do you think the 214L alignment will be from my 360L? I know I should just build it and see, but I wanted to find out what you all thought here. Also, where do you all have your gains set to? * BTW my room is about 18'*24'. Rug on concrete.