I might need to re run audyssey my levels are Front L +3 Front R +4.5 Center +3.5 Sub -2.5 Sur L +4 Sur R +4. Speaker distances what is the displayed distance from. Mine show FL 10.8 FR 12 C 11.3 Sub 12.3 Sur L 11.3 Sur R 7.9 thanks
Refer to the owners manual for things to keep in mind before running Audyssey and specific settings around levels, distance in feet / meters etc.
Once done then tweak levels (increase 1db each time for all speakers) if you still feel that it sounds low and also if you are sure the speakers can handle the power.
As mentioned before Audyssey is very conservative when it comes to setups and does not 100% guarantee optimal adjustments. As for me once setup is done, I change Audyssey settings to Audyssey FLAT. I get detailed better SQ. Dynamic Volume is kept on LIGHT. Reference Levels is at 5. All these settings can be tweaked in Manual Setup. This has worked well for me over the last 8/9 years using various models of Marantz AVRs, Experiment only if you are 100% sure of settings and should be done at low volumes to avoid blowing up the avr or speakers.