Heya all. I should be ordering my SVS 20-39 PCi soon and that'll leave my wallet drained for awhile, so I'm wondering how I can best calibrate my sub without buying an SPL meter/Avia or DVE right away. It'd prolly be a few weeks before I could afford either of the items (I'm still a poor highschool student with just a part time job!) but I'd like to get the best sound I can out of it until I can do a "proper" calibration. Suggestions, comments?