I have set up my speaker levels using the receiver and to my ears the sub sounds a little low. I am not an audiophile or anything so I do not totally trust my ears. What if I am just a closet distorted bass lover and don't know it ?

Has anyone used their receiver for this, then used a sound meter ? Did the results correlate ? Anyone know if receivers in general are known to be good for leveling sub to other receivers ?

Any suggestions ?

Some other info.
The levels are as follows
Left +7.5 dB
Right +7.5 dB
Center +6 dB
Sub –7.5 dB
I realize that since the sub is using it’s own amp they don’t really correlate.

My setup,
M60ti
VP150
S8
Velodyne DLS-4000 Sub
Yamaha RX-V2400
All speakers are set to small.
I am using the line level out of the Yamaha
LFE is set to cross over 80HZ
Sub internal low pass is bypassed.
The sub is self powered, 200Watts is the manu. claim.
The sub level(knob on back of sub) is half way between lowest and highest
Listening room about 18’ by 15’
Opens to a hallway(stairs and high ceiling behind halway and another room behind the left speaker. Opens to a another room to the left of the couch. There is a low pile carpet but the walls are fairly bare, the usual sheet rock wooden blinds.