The outdoor measurements showed less cancellation of the low frequencies with increasing baffle size but raised some questions regarding the dips that showed up during the process. Time to do it over and conclude that things are indoors the same as outdoors ;-) If you read the previous page then you know already that the lumber used to support the drivers was causing it's own cancellations, hence the dips and some peaks. Time to come up with another way to produce a variable baffle width. Time for foamcore and gafferstape I guess ;-) Scheduled for this week, promised.
Below the failed (successfull ?) attempt to prove a point ;-) Take a look how the dip at 800 Hz increases as the gap between the two supporting posts was closed. No smoothing on this graph otherwise the narrow dip would dissappear !
The frequency displayed is from 50Hz to 5 kHz since the higher frequencies were not affected by this experiment.