Okay i got my two 8 ohm mesa recto 4-12 cabs hooked up to the two 4 ohm jacks, and the neighbors were gone so i decided to turn it up halfway because everyone knows the louder you push the tubes the better they sound, not the case i put the volume on 5, channel 2 modern, output on about 3.5 or 4 , and it sounded like pure-t ****, it started breaking up and just did not sound good at all, Whats the deal,my tubes are not even 6 months old? It was LOUD and my ears are still ringing but it did not sound good at all.