Thank you very much, I got it.
Ok, I'll try Level Switch to Amp. But, at first, there was a reason I did not use the Pod XT and Spider IV 15. I was not able to find a way to turn off all Spider settings, get a cleanest tone and the Pod XT sound not be affected.
I think the Level Switch to Amp setting will not solve this problem ? Is there any way to use Pod XT (the bean model, not live or pro) with Spider IV 15 ?
Thank you very much..