Any VI with ringing in the filters, esp. one that is ten months old, should be fired right back to the factory with a terse note to "fix it, or refund my money".... There is simply NO excuse for a $2800 radio, that is advertised to be the best that there is, to have these kinds of problems... Luckily, my 14 month old VI does not ring, even at 250 cycles, and has not had a single problem... Denny