in review of xs you mentioned that it looses grip in lower bass. Here you mentioned that there is improvment compared to last generation. Is that XS2 what you mean?, I did not find review, but "last generation", I understand XS2. I want to ask you if xs2 as you aparently auditioned it also does loose grip in lower end alternatvely if x3 too. Maybee for sombody is not big issue but it is important to me. Thank you in advance.