ok guys i have a problem.... i have 2 pioneer subs (the impp kind with the blue and black dust cap that say 400 watts on them) and i have them in a box thats about 2 cubes. i have a volfenhag amp that puts out about 250 watts to each sub and i have the low pass filter on. i have all my wires done right and every thing. but when i turn my volume up i cant hear a thing! i mean the subwoofer is moving like crazy and i cant hear ne bass from the sub.... can someone tell me what my problem could be?