hi guys, this has probably been answered a few times, but i have been searching and cant seem to find the answer. my 1998 A3 1.8T has the non bose sound system, it does have the nokia sub and amp in the boot. bought the car without a stereo fitted, but it does have an adapter, however when i plug my jvc head unit in, only the passenger side front speaker works. the stereo works fine as ive tried it in another car. so my guess is i need a different adapter cable. bit confused though, there are 3 multi coloured blocks connected together with wires going into all of them, but only wires coming from one on the adapter. Are these not for the speakers or am i completely wrong? been looking for an adapter but confused as to which one to get as most are for the bose system. could someone please post a link or photo of what my lead should look like? if you need anymore info ill try my best to help. thanks.