Thanks so far for the responses. FYI. The subs are connected via line out 2 on the preamp. Line out 1 goes to the 890's. Then 890 out to the monitors.
Can I run 4 ohms into 8 ohm speakers?
Hello, I went to EAR 890's as mono blocks. Set up as directed by EAR. I have Tyler Acoustic custom built 8 ohm speakers with 500 watt powered subs. When connecting to the EAR on the 8 ohm taps I effectively reduce it to 4 ohms. Since that time, I have blown 3 tubes total and took out one resistor. The problem has occurred on both amps. All tubes were new. The last incident occurred within 5 minutes of powering up! Has this been caused by the ohm issue? The tubes blew with great flare! Have I made the classic audioholic mistake of one tweak too many? Please don't chime in about "do you need this?" Looking for answers to the problem. Help me to understand ohms and mono blocking better!!