Newbie with question

[pscm]

I just got required equipment and setting up to take measurements in my listening room built last winter. This is a 2 speaker setup. I am using mic jack to rca cable from pc and a minidsp umik1 . I was able to produce pink noise to try and set level using preamp volume control. Do I need to set each speakers volume level to generate the same db's? I ask as after setting one speaker at 75db and then checking the other the volume is different to the ear and certainly with the mic.

Thanks in advance for input.

 

[FargateOne]

For good SS&I specially in stereo, the 2 fronts must be at the same SPL

 

[pscm]

Thanks for this. My ignorance but if at a particular preamp volume setting, I would think the output would be the same.? I am going to experiment more tonight and maybe take some actual readings. My setup is 4 tube preamp and two amps in mono format. A Schiit Freya and two Vidar's. If I discover that there it's a substantial difference between left and right channel's makes me wonder if I have an actual hardware issue.