E650 acoustic feedback with SatNav

[Guest Morelli]

I have a “car kit screen dash holder for HTC710/ E650” -http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330234647525 – which has a built in amplified speaker. When I use the phone with SatNav there is a noticeable build up of “feedback” when the volume is switched 'on' within either TomTom or Route66.

Any ideas as to how I can have the volume 'on' without the feedback?

Morelli