This is my 1st home subwoofer. Okay, over the weekend I put together a box ~125 liters for my sealed dayton dvc 15. I figure the bracing I put in will reduce the volume to about ~110 liters and then heavily stuffed should give me a qtc of .57-.60. Earlier today, I fired it up w/out stuffing w/ my dad's old pioneer receiver giving it roughly 80 watts rms. The only bass dvd I had was LOTR, so I let it go. In some scenes such as when the dragon in the cave breathes fire, I hear a popping of some sort. When I turn down the volume on the pioneer receiver, the popping stops. So is this distortion or is the amp clipping? I plan on getting one of the 250w amps. Oh, and it still shakes the house. My other question is if you can use a flush trim bit for baltic birch. The enclosure was made of BB because it was fairly cheap at $23.75 for a 5x5 sheet. I've seen people list it in the ~$50 range, so why not. I screwed up putting together the frame, so I have a significant amount of wood to cut flush. Would the flush trim bit ruin the BB. Last question, what kind of finish can I put on BB? It's much better looking than MDF. Thanks.