JBL L100 Classic to 4 or 8 ohms ?

I have the JBL L100 Classic speakers connected to a McIntosh MA6600 200wpc integrated amp.  I tried both the 4 and. 8 ohm settings and to me in my room the 8 ohm setting sounds more natural.  There is no right or wrong way, whichever sounds best to you. 

I supplement my JBL speakers with a single SVS PB2000 sub.  It makes a big difference, I also use a Schit Lokius 6 band EQ