Yep they're in the cab block. That's something that can work for you and against you at the same time. Atleast for me I found the 4x12 XXL V-30 and 4038 Ribbon Mic worked for me once I tamed it with Low Cut, Resonance, and a little Presence. Not recommending you change what you have by any means. There's so many ways to setup the PODHD and depending on your guitar, pickups, amps, speakers, etc., whatever way works is the right way.
I think that's why people get frustrated sometimes. There's soooo many ways to configure, setup, route, and tweak everything that it can be a little overwhelming. I guess that's the trade off for versatility.