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four subwoofers help. HSU VTF-15H, MBM-12, VTF-2 MK4 , and Velodyne CHT-15

Joined
Feb 27, 2025
Messages
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frequency sweep with subs only
subsonly.png


subs and front speakers canton karat
subsandmain174.png

subs only group delay
subsonlygd.png

subs and canton karat group delay
subsandmain174gd.png
 
i think i fixed it, i had an amazon box on the couch maybe causing the null at 90 . still there though
box.png
 
Please read this. Your post:

- does not have a question
- does not tell us exactly what you are measuring (4 subs together? both speakers together?)
- unsure if your measurements were taken properly

The biggest flaw I can see is that your subs are 40dB higher than your mains. But then you terminated your measurement at 100Hz so we don't know the rest of your frequency response.
 
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