Hello Folks, when modeling low frequency speaker responses for the bass section of a speaker design you have to input the series resistance of inductor and cables, but if you are doing it for a valve amplifier do you have to add the resistance of the secondary winding of the output transformer? thanks Arthur.
You want to enter the output impedance - somewhere in the range of 1/2 to several ohms.
This can be measured, just measure the voltage the amp puts out on the same tap into several resistors with the same volume setting.
http://www.diyaudio.com/forums/tubes-valves/229027-amplifier-output-impedance-measurement.html
This can be measured, just measure the voltage the amp puts out on the same tap into several resistors with the same volume setting.
http://www.diyaudio.com/forums/tubes-valves/229027-amplifier-output-impedance-measurement.html
If you know the amplifier's damping factor, just divide the specified load impedance by DF to get amplifier Z-out. For example, if DF is 20 for an 8-ohm load, Z-out is 8 / 20 = 0.4 ohms.
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