Ultra Fbr2 Feedback Acoustic Guitars Survey For years I avoided using one of my favorite guitars in live performance because of chronic feedback problems. I had seen the Feedback Buster used by others, but just never got around to buying one. I can't believe I have now "fixed" my $1,000+ guitar for less than $10. This product is designed and manufactured by Kaman Music Products, a sister company of Ovation. So it's a perfect, snug fit for my 1980s-era Ovation Legend, including the curved cutout to fit around the end of the fingerboard. I would expect it to also fit any acoustic-electric guitar with a standard size soundhole. The soft rubber-like material would be easy enough to cut if minor customizing was needed. But for the price, it's definitely worth a try. But if you're looking for a perfect Ovation fit, as the saying goes, "don't settle for cheap immitations. " I have a nylon string Cordoba A/E Classical Guitar. . . it has a different size hole than standards! I know. . . this makes me the dope, but I wish somewhere I would have seen that specified. Wasn't worth the cost of shipping it back, so now I just have a rubber circle. Enjoying the product's ability to help keep the noise down when I'm practicing. Nice add-on for any acoustic player's kit. Works just as advertised. I have a late 70's Yamaha steel string and had a K&K pickup put in going through a LR Baggs PARA DI and this combined with the notch on the DI means I haven't gotten feedback since. And I don't need to loosen the strings first, slides right in and stays. Lutehole. com is where I found a custom cover that looks great for my classical. They do oval also. Takes 2 weeks for any size less than 4". Check out their designs.
http://gradebit.com/31159