i have a 2005 honda odyssey exl with a factory stereo. I decided to add a clarion amp (400 watt) and and 2 12" subwoofer and getting a feedback with my speakers when turn my volume up. prior to this we tried to add a powered sas bazooka bta 10200 and it keeps giving us feedback. a professional installer is hooking this up for me but still no luck. he tapped the high level inputs behind the factory stereo with rca adapter with varible control and tweaked with the gain and all the buttons on the amp. still no luck we are using an 8" gauge power wire and grounded the amp the best he can. The set up sounded excellent except it will start having intermittent feedback. have any of you guys experienced this problem before? Is it the Van just came out and eventually somebody will make a filter or some kind of an adaptor for it. any help is appreciated.