I HAVE A 30WPC (TRIODE/KT88) AUDIO ELEC SUPP (CARY) SUPERAMP SIGNATURE EDITION. IT IS CURRENTLY DRIVING 2 WAY STAND MOUNTED MONITORS FROM THIEL (NOTORIOUSLY HARD TO DRIVE) THEY ARE 4 OHM & DO DIP BELOW THAT. IT IS AN OK COMBO, BUT I HAVE A SMALL ROOM, & CAN'T PLAY AT CONCERT LEVELS IF I WANT TO. I WOULD SWITCH TO A LARGER, 8 OHM 3-WAY THAT IS EASIER ON TUBES, IF I CAN FIND SOMETHING THAT IS AS DETAILED & ACCURATE AS THE THIEL SCS3'S.