Hello dear MT community, I hope you can help me with my problem with tips and advice. Before moving it is about my car system. To my system: I have a power amplifier (VRX). On this power amplifier hang two loudspeakers (both JBL) and two subwoofers(one pulse and the other JBL MS-12SD2). Everything is installed, connected and also works. It also sounds pretty good… but I’m still not quite satisfied, because I would like to know how to use any device (Su b and speaker) could regulate individually. Because a change in the setting (for example when I turn up the bass, both at the power stage and on the radio) always changes all the devices simultaneously. Besides, I also could not solve the problem that my subwoofers not only play the deep tones (bass), but also the whole song actually, like e.g. the vocals. They advised me to buy a subwoofer frequency switch and build it into the chinch line, which I but it just made my entire system weaker and did not solve my subwoofer problem (no matter on which frequency). Could you help me with my problem? If I have not explained anything precisely enough or you still lack information to answer my questions, just write and I try to answer it as soon as possible. Thanks in advance already, look forward to your reply. MFG Pirow