So i took my dcons out to repaint my box, and the coil looks like its striped gold/ red/brown. Are they supposed to look just solid gold? I never looked at the voice coil when I got them new so i don't know if this is actually what they look like, or If i've been burning them.. (I only give them 180 watts each??) My guess is that they're supposed to look like that. But i'd like some reassurance. Thanks!