For duo gig where guitar player sings out of his amp and I out of mine. Picked up the Mark acoustic AC 101H with AH 250 head. Manual says it’s good for double base but I get a flange/ chorus sound with all the effects off. Don’t know if something is wrong with it? I still have a window to return it ….wondering if there is a better solution out there? Ideally a combo but just a head would probably work .https://www.markbass.it/product/markacoustic-ah-250/