Passive Speaker System BP015. I bought it some years ago . Speaker output at maximum level of my Sony Walkman for medium level music passages is only audible at say 5-10 cm from my ears; further away I hear not the promised enhanced bass tones. Pluged in to my main audio system the volume of the amplifier has to be turned onto an incredibly high level to get some reasonable output (without mass bass though). Should I put the BP015 system in the trash can?