I have just replace the factory speakers on my Koup with some Pioneer component speakers front and rear and also added a 4 channel power amp. I'm a bit unsure on the speaker wire colour codes, the front speaker wires were Orange and Green on one side and Blue and Red on the other. I saw a post somewhere this guy stated that Orange - Green +, Blue + Red-, I was wondering if anyone has the correct codes for the speaker wires. By the way the with new speakers and the 4 Channel power Amp the sound quality has improved so much, more Bass and more Volume the factory fitted head unit sounds great now.