[Elecraft] K3 SSB Audio

[Nick Henwood]

Having a great time with my K3 (#228) which I mainly use for CW. However on SSB (2.7 filter) I find it tends to ring - even more so with DSP (speaker and headphones). Gary sent me a very fast and helpful e-mail and I have found that trial and error adjustment of FL FRQ makes an improvement - but it still tends to resonate slightly.
Is it the xtal filter (would the 2.8 be better?). 
Is it anno domini and my hearing ? (unlikely as I was only licenced in 1963).
Gather others have commented and would welcome shared experiences and advice 
73 Nick G3RWF