I am have 581i I have shiper back Wadia (Mr john.Schaffer) upgrade for me, I get back a 3 week ago I have listened very carefully,581se retains the high frepuency extension and supper detail,I have a DCS P8i and Emm labs for company production labs room now I am had setup 581se for my master labs room play with N32 preamp Pass labs 1000.5 and Mttlabs speakers $152.000.00 a pair.
Mr,John Schaffer
I am would be appreciated you done 581se
Michael,N L