2. amps-preamps
  3. 1179716528

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

Showing 2 responses by audiokinesis

audiokinesis
2,713 posts
 
On the topic of loudspeaker impedance and crossover complexity, "simpler" doesn't necessarily translate into "easier to drive". It is quite possible that elements in the circuit that add to the visual complexity are smoothing the impedance curve, reducing the phase angle, and making the speaker a much easier load to drive. Since we don't get to see the crossover and even if we did we probably couldn't reliably predict the impedance curve just by eyeballing it (at least I sure couldn't), the best bet is to look at the impedance curve itself. That is what the amplifier sees, and whether a tube-friendly impedance curve is arrived at by a complex crossover or by an extremely simple one doesn't matter to the amp.

Duke
dealer/manufacturer
audiokinesis
2,713 posts
 
Ha! Bartokfan, Duke WISHES he built those SoundLab panels! Nope, that's the work of a much much more advanced designer and manufacturing team than yours truly.

Tvad has described what I do well enough that there's no need to elaborate.

Thanks,

Duke
dealer/manufacturer
More to discover