standard tube amps gain is voltage driven
standard solid state amps gain is current driven
a speaker is a electrical load .
if the speaker impedance changes in a wide range,
- and the solid state can provide the needed current, the frequency response will be fine.
- the tube amp will mostly fail and the frequency response will be no good
if the speakers is designed for tubes, the impedance curve is flat, to overcome this.
or, the frequency curve is following the impedance curve in that way, that a tube amp will provide a flat response
(but than a solid state will not fit) , speaker example is "Zingali"
But there are also solid state out there, which will like horn or flat impedance speakers.
Boulder for example are "voltage" gain amplifiers, there "sinus" power response does not increase on lower speaker impedance. They are designed to work on those type of speakers as well.
Than there is the "damping factor"....
new story
I like on tubes:
- Zingali
- Verity Audio
- hORNS
- Zu
- BD- Acoustic
- AER
- Pnoe
- RD Acoustic
- Cube
- Ayon
- Lumen White
- some Tannoy
- some Gryphon
- some Wilson Audio
- Living Voice
- many others
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