I'm playing with this, as I find it totally useless for the reason why I bought it - delay effect for my harmonicas. So - I tried it with my MXR DI+ and even though the MXR won't tolerate the DD-1 after itself, I can use it before it in the effects lineup. I see the DD-1 has a 'B' channel output and I was wondering if you can use a much smaller amp and cab for the stereo effect. Since - I reason - this is just going to carry a delay of the main signal - Signal A - the quality may not have to be as powerful as the main amp/combo unit. What do you think? I'm trying to not have to take twin amps/cabs etc when I use it - but mostly I just wonder if the effect would be lost that way. Any idea why the MXR DI+ won't allow the DD-1 to run after it?