Understanding Tube Power Ratings


What do I need to know about the power ratings for tube amplifiers?

With solid state models, I looked to see if the power output doubled from 8 ohm to 4 ohm as one sign.

What about tubes? Are 250 tube watts comparable to 250 solid state in terms of driving power? Please, I understand equal measurements should mean equal results, but am I missing something?

I'm looking to move from the Bryston 4B ST currently driving my Thiel CS 2.3s. I have a Rogue 99 magnum preamp and have the new Rogue Zeus on the short list. The Thiel need for high current had me shying away from tubes, but I am rethinking this.

Thanks!
johnmcalpin

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