Takes a few mikes, like 10 - 20, and driving into bright sunlight is bad, but for touring , the original R12 setup works pretty well. Loud, but coolish. 

Karl Wolz
Sent from my electronic umbilicus

> On Jun 28, 2014, at 8:34 AM, Zeitgeist <gruengeist@GMAIL.COM> wrote:
> 
> complaints
> from camper owners, since the vents are several feet behind the front
> seats, but