2+1 setup; Young sound engineer don't do this ;)

[Darek K]

I recently built a 2+1 setup for my bedroom, as shown in the image below.

For a few days, I made adjustments using a 2x4HD minidsp and a REW.
Each time, after finishing the work, the sound was satisfactory.
However, when I later tried to listen to music, it turned out there was too much bass.
I finally noticed this pattern. The work and measurements were finished, sound was good, but listening later – it was wrong.
It turned out that I had the amplifier power settings set correctly for the measurements, and for listening, I was lowering the power of the amplifier driving the main speakers (no matter what the reason is), which reduced the volume of the higher frequencies, while the subwoofer bass volume remained at the previous measured level.
I didn't realize in time that I was only lowering the volume of one component, while the other remained the same.

If for some reason you think the main volume might be set too high, lower it using the slider on the minidsp.

 

[Roland68]

I recently built a 2+1 setup for my bedroom, as shown in the image below.
View attachment 479227
For a few days, I made adjustments using a 2x4HD minidsp and a REW.
Each time, after finishing the work, the sound was satisfactory.
However, when I later tried to listen to music, it turned out there was too much bass.
I finally noticed this pattern. The work and measurements were finished, sound was good, but listening later – it was wrong.
It turned out that I had the amplifier power settings set correctly for the measurements, and for listening, I was lowering the power of the amplifier driving the main speakers (no matter what the reason is), which reduced the volume of the higher frequencies, while the subwoofer bass volume remained at the previous measured level.
I didn't realize in time that I was only lowering the volume of one component, while the other remained the same.

If for some reason you think the main volume might be set too high, lower it using the slider on the minidsp.
View attachment 479232

But that's one of the basics.
The miniDSP acts as an active crossover. Of course, the overall volume must be controlled by the miniDSP or the source device in front of it.
A quick tip: set the maximum volume on your amplifier and subwoofer to approximately the maximum volume you hear. This way, you can't accidentally turn up the volume too loud via the PC and damage something.

 

[Raj21p]

You nailed the issue it’s a gain structure problem. Always keep mains and sub locked after calibration and use one master volume (MiniDSP or source) to maintain balance.