Sounds like I can buy a single channel amp then and I'm good to go. Since I have the install/removal for the BSW clear in my mind this doesn't sound insurmountable. Thanks!

__________________
2007 328i Sport, Monaco Blue
2011 X35D - sold -Space Grey
2004 X5 4.4i - sold - Kalahari Beige
2001 X5 3.0i - sold - Pearl Beige
2006 325i Sport, Sonora Beige
2000 323i - sold - Sienna Red