Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: Efficiency and Sensitivity are not the same thing! posted by Dave_K on May 08, 2017 at 16:54:20
Just by using the 4 ohm tap instead of the 8 ohm tap (and assuming that in each case the taps are loaded correctly) with some output transformers. I forgot to mention that...
What would be the mechanism for that?
Certainly connecting a 8 ohms load to the 4 ohms tap will cause the LF -3db point to move one octave up because the reflected impedance has doubled but the inductance stayed the same but the reflected impedance with a 4ohm load connected to the 4 ohm tap should be the same as a 8 ohm load connected to the 8 ohms tap and therefore the LF -3db point should stay the same.
Have Fun and Enjoy the Music
"Still Working the Problem"
therefore the LF -3db point should stay the same.
Emphasis added; 'should' being the modifier in that sentence, and I agree.
However, in reality the fact is that the larger the turns ratio it seems that there is a loss of efficiency. We've had several custom transformer projects and run into this phenomena. I suspect a YMMV thing depending on the quality of the part.
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: