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  1. 1

    driving a sb220

    Well, my shack has an amp capable of 6kw, but I slow cruise it at 3.8. No need for more if my system is perfect and I own skipland.
  2. 1

    driving a sb220

    Interesting. I can get 3kw out of mine using 100 watts less drive than you. Before I get jumped on, I rebuilt the 220 using all the new upgrades and the 3 500zg tubes. But to swing 400 in? Just plain stupidity and needless if modded correctly.