Built some super tiny notebook speakers not sounding bad at all! Sure, they are tiny, don't expect them to blast you from your chair, but they sound more than decent!
Sound curve straight on the amplifier:
The usual raised midrange from a fullranger...
I had already composed a little filter to straighten them out before having measured them... And it turned out just the thing they needed:
The filter is a little LRC notch followed by an LR high range padding.
That is 10uF, 220uH and 13R and the LR is 330uH and 3.3R....
Box is about 0.3 liters and port 15mm diameter and 12cm length (with a bend inside to make it fit in the tiny box)

Sound curve straight on the amplifier:

The usual raised midrange from a fullranger...
I had already composed a little filter to straighten them out before having measured them... And it turned out just the thing they needed:

The filter is a little LRC notch followed by an LR high range padding.
That is 10uF, 220uH and 13R and the LR is 330uH and 3.3R....
Box is about 0.3 liters and port 15mm diameter and 12cm length (with a bend inside to make it fit in the tiny box)