Am I reaching the max power / amplitude of my Rotel RB-951 power amp?

your speakers are 5ohm, 88db not overly sensitive but not bad either your amp has 150wpc so i would not expect it to run out of power. I suspect something else is the issue. Like Cleeds mentioned it may be not enough gain in the preamp/source. The kenwoods pre-out may not be up to the task. Or another issue that's not easily determined from the information available. Like is muting on. 

One thought though your meter is between your speakers? is this directly between them as that's not the ideal place to measure from. 

I’d love to say I’ll just keep tinkering with it, but i’ve been tinkering with the problem off and on for the better part of 6 months now. The only thing I have left at this point is to start buying other alternatives and switching things out, unless anyone has any suggestions with the equipment I already have.

You’re right, it’s not the best place to measure. It happens because I’m sitting on the ground with the units pulled out to mess with them so that’s where I’ve been measuring from. I’ll take an accurate measurement this evening to see where I’m actually at, but regardless of the number my volume is still limited to below where I would like to be able to listen to it at times.

Thanks for taking the time to help. This issue has frustrated me for a while and I just want to sit down and enjoy my set up haha. Sorry if I come off as frustrated.

Is the input level pot adjusted to maximum?

There are also internal jumper settings for input sensitivity.

RB-951-OM.pdf

@imhififan yes those level adjustments are set to maximum. I was hoping that was it when I came across those a few months back but alas. Thanks for the suggestion.

Does the loudness vary in proportion to turning of the level screws?