AUdio research LS7 Tube replacement

These should work well. I use them in my ARC LS-22, they sound much better than the Sovteks and the JAN Phillips I have tried. Not bad for the cost.
Sturgus

http://www.tubemonger.com/Matsushita_Japan_6922_E88CC_Mullard_Tooling_NOS_p/591.htm