I have been using my 11 ohm Spendor LS3/5a's with my Inspire Firebottle. Lately, I have a pair of GE fatboy 6CA7's installed. The output according to Dennis' chart is 5wpc. While the combination of 5 wpc and low sensitivity (82db) speakers sounds like a mismatch, the speakers are an easy to drive load.
This combination works very well in my 8 by 10 room. Most of my listening is Jazz and acoustic music.
Ed
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