I have build the loudspeaker jigg, so I can measure thiele small parameters, it consist of a class b amp and two opamps, this schematic is from someone here on diyaudio who I have made now a pcb for.
Now i can measure speakers with some more trustable outcomes.
Now i can measure speakers with some more trustable outcomes.
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The stuf is ready, it works, better then use of the amp in the pc who is small, now I have all in one go to measure speakers.
Care to describe a bit more about how you test? Is this just measuring complex impedance, or do you use it with a microphone too?
Maybe the schematic make some clear.
It is not for use with a mic, it measures with limp the impedance and resoance including the parameters, the amp in a pc is small, so a couple of watts outside is better.
Maybe I had better putting a pot into the amp input, or a limiter to prevent blow it if signal pc is to high, I can adjust feedback so it wil never happen, that makes no need for changing board.
Maybe the next time, using a amplifier ic.
regards'.
kees
