It didn't quite work out for me, mainly the effects loop, I just couldn't get a match in volume when engaged/disengaged, maybe because it was parallel instead of series, I wasn't about to open up & flick a switch of whatever you need to do to change as this was a brand new combo, so sent it back.
Also it said 600w on rear of amp, I emailed Markbass but they took a while to reply & id already returned the combo, however they said it's a 'typo' & it does have the updated power amp 300w + 500w.
Nice combo overall but didn't blow me away .. back to original plan .. Darkglass M900