Different plots in ALL SPL vs SPL & Phase

[mboxler]

I'm almost afraid of the answer...

I've been using the ALL SPL plot for my passive crossover construction. I decided to use REW EQ to calculate a DSP crossover. Why do the two "before" measurements differ? Since all the suggested EQ parameters are based on the EQ plot, it seems like the resulting ALL SPL plot would differ from the predicted EQ plot???

Thanks Mike

All SPL plot

EQ plot. Much flatter.

 

[John Mulcahy]

I'm not really following the question. Predicted EQ shows the effect of any filters that have been set up. It would only be the same as the measurement plot if there weren't any filters.

 

[mboxler]

I'm not really following the question. Predicted EQ shows the effect of any filters that have been set up. It would only be the same as the measurement plot if there weren't any filters.

The red plot is my raw DCM420. When I click on EQ the blue plot appears. No filters have been applied yet, so I would think the two plots would be identical???

 

[John Mulcahy]

Appears where? It isn't possible to tell what you're looking at from those images.

 

[mboxler]

I'm an idiot. I was EQ'ing the wrong measurement. Sorry!

 

[John Mulcahy]

The EQ window shows the currently selected individual measurement, which is measurement 5. On the All SPL plot (which is an overlay) you are only showing the trace for measurement 1. It also appears you have changed the trace colour for the filter adjust graph using the Trace options, otherwise it would show the same colour as the corresponding individual measurement.