Tube amps and speaker ohms


In your opinion , do push pull amps work better with 8 ohms or 4 ohms. .I am under the impression the lower the ohms, the more power is demanded from the amp....Another question, are there low powered SET amps ,and high power SET amps?
I'm looking at a 40 watt 845 tube amp for my 8 ohm, 89 db speaker.. just cked the Thor has a 86 db W18 midwoofers(2 per cabinet) and a 88 db tweeter. Will an 845 amp rated 40 watts be able to drive the 86/88 db speaker? With authority, bass, mids, highs, in dynamic sound stage? Synergy? Or poor match?
bartokfan
+++ I googled impedance. Its a load issue +++

If you googled it then it must be true? Okay

Have a look at Decware speakers – they’re all designed to work with 2wpc plus tube amps. Most of them are rated 4 ohms nominal. http://www.decware.com/newsite/mainmenu.htm.

Ultimately it your money and your choice how to spend it. I personally don’t have any issues with orchestral music on my system. And no, I do not have a hearing problem ;-)

Duke, sure there are exceptions (and I did state it as a “rule of thumb”), but the most tube friendly speakers are single driver non-crossover designs. If I may ask, what speakers do you build and are they designed to be used with vacuum tube amps?

Regards
Paul
Duke builds panels, which as you know require massive ss amp power.
Paul then you have a SET amp correct?
Would that be similiar to the 300 tube? Yes. I heard the 300 tube with orch, the load/complexity was overwhelming. Total shut down of the tube. A CJ mono block as well shut down on a ML panel with orch. So obviously orch overload is not limited to SET but can affect just about any tube amp, which in Push/pull config may have to do with the weakness in the trans. In SET's the weakness in "pulling off" orch may have to do with the characteristic of the 300/845/805 tube family
"Duke builds panels"

I didn't know that. Bartockfan, you are a wealth of obscure information. :-)

05-22-07: Bartokfan
Duke builds panels, which as you know require massive ss amp power.
Boy, oh boy Bartokfan, you are the consummate source of bad information.

Duke builds dynamic loudspeakers that are tube friendly.

His Stormbringer and Jazz Modules are both 92 db/1w/1m, and have impedance loads between 8 ohms and 12 ohms. Very tube friendly loudspeakers.

As a dealer, Duke sells SoundLab speakers, among others.

And, what's up with stating Seas drivers utilize copper magnets? Copper is a non-magnetic material. The Seas Hexadym Magnets used in the Excel line and Millenium tweeter use neodymium magnets.

A little more research would be appreciated before posting.
My bad. I was only aware of Duke's mention of his Sound Labs.
The Seas phase plug is copper, and the back also looks to be copper. I was not aware of the Hex magnet. thanks for the clarification and link.