with my gt td i just swapped the hu for an alpine touch screen and fitted a sub and amp, for what it was it was really rather good. I've got a set of DLS 6.5s and a DLS 5 channel amp that will go into my next car although if it turns out to be a golf I think I might have to go 3 way as the positioning of the 6.5 isn't ideal. I was going to run active but don't think i'll be able to in the GTI