Response Up Close
Figure 11, we can observe that the F3 of the summed response
to be at 49Hz.
to our box modeling (Figure 12), where F3 was predicted to
be at 50Hz, this is indeed very close.
shall now turn our attention to the nature of the rolloff.
This is in fact more important than F3. It can mean a boomy
bass or one that's tight and dynamic.
the actual summed response, rolloff is Bessel like - starts
early and rolls off gently. This is very similar to what is
shown in simulation.
these results, we can safely conclude that with precise Thiele
and Small Parameters, box modeling is very accurate.
the next chapter, we shall examine the true frequency response
of the PL18 in practical use, that is with it loaded into
a 18L box and see much it deviates from a typical Frequency
Response Chart provided by the manufacturers.