No bass roll off on my measurement??

[Marzen]

Why do my summed and not summed sub measurements look like this? There is no roll off at all? Thanks

 

[John Mulcahy]

Need the mdat file to check the measurements look valid, but could also post images of the Impulse graph for each sub with a time span of at least 1 second.

There is a very wide SPL span on that graph, you can adjust the span using the Limits button at the top right of the graph - probably want 40 dB at the bottom and 100 dB at the top.

 

[Marzen]

Need the mdat file to check the measurements look valid, but could also post images of the Impulse graph for each sub with a time span of at least 1 second.

There is a very wide SPL span on that graph, you can adjust the span using the Limits button at the top right of the graph - probably want 40 dB at the bottom and 100 dB at the top.

Thanks, here's a saved mdat file containing the left, right, and summed measurements. https://drive.google.com/file/d/1WT1BI3bctJ6NlEivWNsozGEMlL0hGnaf/view?usp=sharing

 

[John Mulcahy]

Measurements look fine. They were made without a timing reference though, so it isn't meaningful to add them (or at least adding them is unlikely to show the response as it would be at the measurement position). There is roll off at the low end eventually, below the cal file correction (which stops at 10 Hz).

 

[Marzen]

Understood, I found a quick guide for enabling a timing reference using the umik-1 here, I'll incorporate that today. Thanks for the tip.