Try:
Range – 50
Power – 55
Bass Cut – Set this to -40 or lower (Compressing the bass will clear up some of the T sounds you're hearing)
Bass shape is fine at 0
This will give you a different sound but it will allow the MB to work a little more and that will help. I would make sure that no speaker settings are enabled. Also make sure Noise Reduction is on (checked) so the MB section works at it's optimum.
If those setting do not satisfy try The Regulator setting. If you want CLEAN and well defined sound that you can sculpt try Zenith. Bass cut -50 Range 54 Power 71.