Response anomaly when HF and LF are combined

[Jeff Weissert]

I have been measuring my system and have an anomaly between 70-300 Hz. I don’t have the anomaly when I measure just the LF. When I add the HF the anomaly occurs. The HF as measured is 40-50 db below the LF level in that area. I can’t figure how something so insignificant can alter this. Any insight would be appreciated. I am running REW 5.19 beta 12 with a miniDSP UMIK-1 microphone, and a Focusrite Scarlet 2i2 series 2. I am attaching 3 jpgs of the responses. LF only, HF only, and combined. If this is the wrong forum please recommend an appropriate one.

I over posted the pics accidentally...
Thanks,
JeffView media item 4652View media item 4653View media item 4652View media item 4652View media item 4651

 

[Wayne A. Pflughaupt]

It’s hard to analyze graphs with a 400+ dB spread. Please re-post them with the vertical axis set for 45 dB – 105 dB. Horizontal set for 20 Hz - 20 kHz wouldn't hurt either...

Regards,
Wayne

 

[Jeff Weissert]

It’s hard to analyze graphs with a 400+ dB spread. Please re-post them with the vertical axis set for 45 dB – 105 dB. Horizontal set for 20 Hz - 20 kHz wouldn't hurt either...

Regards,
Wayne

Ouch... never saw that change from the main screen. That opens up my eyes... now I will go down the rabbit hole for a while longer... seen much more to work on. Sometimes it feels like eating an elephant!
Thanks for the set of eyes!

Jeff