Hello guys, recently i bought and installed a mazda 6spare tire subwoofer to my Toyota avensis t25 wagon. So I bought it very cheap around 25euro...and it works. In my opinion it works even really well. But what is the problem? My CD can volume from 0 to 63, but the bass from the back is even too loud from 10...I mean that I can not listen to music quietly without the bass even I change the bass to -5 from the equaliser. On the other side the bass is the same from 30 for example to 63. I do not want the bass to be loud when I listen quite music. Can you suggest how I can solve the problem?...I used a digram from the net. The signal is directly from the media