Hi Jim,
got the tone controls working by changing the pod fx loop mix to 100%..
Tech specs on the TM18
Input jack, 1 Megaohm
Send jack, 250 ohm, max, +6 dBV
Return jack, 500 kohm, -3dBV
I've set the FX loop on the pod to 0 dB send and 9 dB return. All switches set to amp level. I got studio eq set to +12 dB gain and mixer level to -12 dB.
Does that sound correct?