The free model of the grounded sub is by Anders Lejczak (www.colacola.se).
The bushes are from Walli's Dry Bush pack.
Since posting this at ReRo I've adjusted the rusty hue of the sub, and decreased its saturation (I thought it was too red, and the wrong shade of red). Probably still not right, but doesn't look too bad now to my colour blind eyes.
John