I listen to talk sport alot and my arial was pants but bought one of these signal amps and its perfect now get all the stations and there easy to fit.http://cgi.ebay.co.uk/Car-Antenna-Radio-FM-Am-Signal-Amp-Amplifier-Booster-/170593652801?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27b82c9041
I tried an aerial booster on my roof mounted aerial and it made no difference, may work on wing mount tho. My roof mount is so crap it works just the same not being plugged in at all. Any ideas why this is?