OK Thanks :-)
I think I got most of it now.
Could you please verify or reject this: Before (in time) the graph begins the input signal is zero (0) volts. At t=0 the input signal is –instantly- changed from zero to some positive DC voltage different from zero (1) and remains at that voltage, at least, for the duration of the graph. The graph shows us the calculated response to that input and the y-axis is depicting the wave form from the speaker in the timespan from t=0 to t=0.1 Seconds.
-I have simulated the response of the driver in a closed box and it is much quicker to settle back to zero than the vented box:
If I change the Le value of the driver to at a higher value (within reason) the response becomes less “pretty”. To my understanding the inductance will impair/resist the –change- in current flowing through the coil of the driver and with that the acceleration and the ability to accurately track the signal.
Does this mean that high inductance drivers (LAB 15 comes to mind) is best avoided or is it a nonissue since we are applying a low pass filter anyway. The low pass filter seems to have huge influence on the step response. (Because the “step” is no longer a step). The high pass filer seem to have much less negative effect.
Low pass only. 4,th order L-R
4.th order High pass only
I am using “woofer box and circuit designer 3.00” to make the filters and load them in to Unibox. For the low pass filter I can choose between Butterworth, linkwitz-riley and Bessel. Which one is the “correct” one? - I assume one or the other is standard in plate-amps and surround receivers.
Can you please elborate on this: "If you look at the 2nd graph you posted there is a slight rise between 150-200Hz or so and this is 0.65dB above however Unibox calculates a mean flat response."
In dont understand what you mean.
Oh! BTW. Is all of this just a mental exerzise or is it actually important. You seem to think that i shuld not bother too much. Why is that?
Thank you for your time.