SDA 2.3TL Dimensional Driver Frequency Response
Bubinga99
Posts: 283
I was curious after looking at the schematic, so I did a quickie test using stepped frequency tones from a test CD and an RMS voltmeter. Pretty close to what I was expecting.
Post edited by Bubinga99 on
Comments
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could you explain to me how to read this... at the moment it looks like a bunch of dots.....................................
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Basically, after roughly 1000 Hz, the driver stops producing sound.
It's impressive how flat the response is until the cutoff.
Now what would be interesting to find out is if that behavior is because of the crossover, or inherent in the driver? -
The vertical scale is relative magnitude in millivolts. and the horozontal scale is frequency. Every place there's a dot, follow down to the horizontal axis and that was the test frequency.
A quick interpretation is it's a 2nd order low pass filter with cutoff frequency a bit over 1KHz, and beyond about 5kHz the output is inaudible.
Just looking at the schematic, if I did the same test on the 4 MW6510 stereo drivers the cutoff frequency would be slightly lower. -
Keep in mind thats just a voltage measurement not an acoustical measurement like that which would be done with a mic and PC based test software.The acoustical measurement will in all probability not appear as linear.
It's impressive how flat the response is until the cutoff.Testing
Testing
Testing -
Keep in mind thats just a voltage measurement not an acoustical measurement like that which would be done with a mic and PC based test software.The acoustical measurement will in all probability not appear as linear.
Good point. If one was really good with the maths, I suppose it would be possible to apply a transfer function or something of that nature and come up with a predicted perceived acoustical loudness given the voltage output.
