Things that Count: Jim Falk's excellent site which features his E.M.G Mk Xa Export model and a hoard of very useful information on E.M.G. The rest of the site on, "Things that Count" is well worth a visit too.
Graham Rankin's YouTube channel featuring his wonderful aluminium / fiberglass Xb Oversize horns. Another link to Graham's horns on TTMF.
YouTube link to another excellent EMG channel by yuichis3010.