Great, and hears a tip. Your using one cab so you have a Mono setup, I too had issues with volumes and my setup was stereo out to stereo in of my power amp and stereo out into stereo 8 ohms L and 8 ohms R of my cab. For some reason it didn't work right, I had low sound, tone was a bit off and it sounding like I was hearing it from far away. After many weeks of seeking Forum knowledge, nothing.
So here's what I did Rewired everything into Mono mode, channel 1 output of the pod is mono ,so connected here to channel 1 input of the stereo power amp which I bridge to mono and used the channel 1 amp output (16 ohms) into 16ohm input of my cab. Sorry about going into detail, but wait there's more.
On the Pod in the mixer block, I had to Pan everything Hard LEFT 100% into the Pods output channel and that's what worked for me.
next time when your playing try Panning 100% to your output and see what it gets you.