I just installed this unbranded system in my 2002 Lexus IS200 S yesterday, I couldn't really afford anything top end. Check out this link for details click here Anyway the problem is that I am getting a hissing noise in the speakers, like interference or something. I used the passion automotive iso adaptor cable click here and a modified autoleads fascia kit click here to fit the HU. The noise is present during DVD video and music playback, during radio, SD/USB, in fact it is present during all sound media applications. I am still using standard speakers. As the fascia kit is plastic the HU chassis is isolated but the HU is still grounded through the ISO lead. The noise is more noticable at low volumes. I fitted this system because of CD errors on my OEM HU, but there was never any hissing present with the old HU. Could this be rectified, or is it a cheap HU problem? Please help