Describe ube sound vs solid state

What are the charesterics in comparing each of these?

nyaudio9801-22-2015 1:43am

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atmasphere Details Discussions Posts This discussion Message User 12,099 posts 03-27-2015 at 08:48pm Copy Comment URL Report Comment Edit Delete ^It works the same in both directions, and global feedback is not neccesarily a prerequisite. If the output impedance of the amp is low enough then feedback is not required. An example is the Ayre amplifier. An example of a tube amp that acts as a voltage source is a Mac 30 from 55 years ago.
unsound Details Discussions Posts This discussion Message User 7,344 posts 03-27-2015 at 09:38pm Copy Comment URL Report Comment Edit Delete ^I'm not familiar with the Mac 30. If that were the case, why would it have multiple impedance taps? http://www.roger-russell.com/amplif1.htm#mc30
atmasphere Details Discussions Posts This discussion Message User 12,099 posts 03-27-2015 at 09:44pm Copy Comment URL Report Comment Edit Delete ^^ If the impedance of the speaker is too low the output power of the amplifier will be lower and distortion higher. The lower impedance taps are provided to deal with this. It might interested you to know that the voltage rules that we are talking about (http://www.atma-sphere.com/Resources/Paradigms_in_Amplifier_Design.php) were initially laid out by Electro Voice and MacIntosh back in the days when tubes were king (late 1950s).
unsound Details Discussions Posts This discussion Message User 7,344 posts 03-27-2015 at 10:27pm Copy Comment URL Report Comment Edit Delete ^Them it would appear that the Mac 30 is not capable of adapting to the variable impedance swings of typical loudspeakers without deviating from linear frequency response?
ebm Details Discussions Posts This discussion Message User 9,311 posts 03-28-2015 at 02:57am Copy Comment URL Report Comment Edit Delete Jump on ube now!!!!!

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