A tube amp typically delivers approximately the same power (wattage) into the speaker across the spectrum despite the impedance curve’s ups and downs, while a solid state amp typically delivers more power (more wattage) into impedance dips, and less power into impedance peaks.
To put this another way, a tube amp typically approximates a "constant power source", while a solid state amp typically approximates a "constant voltage source".
Here is a user-friendly paper on the subject written by a very experienced amplifier designer, best known for his tube amps but his expertise includes solid state amps:
http://www.atma-sphere.com/en/resources-paradigms-in-amplifier-design.html
Unfortunately relatively few audiophiles are aware of the difference between how a solid state amp and a tube amp behave into a typical roller-coaster impedance curve, so tube amps (being in the minority) often take the blame for what is really just a poor loudspeaker pairing.
Relative to how a speaker sounds with a solid state amp, with a tube amp it will be louder where the impedance peaks, and softer where the impedance dips. Eyeballing Stereophile’s measurements, I’d expect the Temptations to have a narrow peak at 60 Hz, and to be weak in the 80-250 Hz region, relative to how they sound with a solid state amp.
I would not expect the Dynaudio Temptations to be a good match for a tube amp because imo weak response in the 80-250 Hz region is undesirable.
Duke
dealer/manufacturer
To put this another way, a tube amp typically approximates a "constant power source", while a solid state amp typically approximates a "constant voltage source".
Here is a user-friendly paper on the subject written by a very experienced amplifier designer, best known for his tube amps but his expertise includes solid state amps:
http://www.atma-sphere.com/en/resources-paradigms-in-amplifier-design.html
Unfortunately relatively few audiophiles are aware of the difference between how a solid state amp and a tube amp behave into a typical roller-coaster impedance curve, so tube amps (being in the minority) often take the blame for what is really just a poor loudspeaker pairing.
Relative to how a speaker sounds with a solid state amp, with a tube amp it will be louder where the impedance peaks, and softer where the impedance dips. Eyeballing Stereophile’s measurements, I’d expect the Temptations to have a narrow peak at 60 Hz, and to be weak in the 80-250 Hz region, relative to how they sound with a solid state amp.
I would not expect the Dynaudio Temptations to be a good match for a tube amp because imo weak response in the 80-250 Hz region is undesirable.
Duke
dealer/manufacturer