My favourite Dingwall to date is the ABZ. If I'd tried a Combustion only I'd have thought it was the best thing ever - until I tried the ABZ. If I'd bought the Combustion I'd then be feeling like I wanted to 'upgrade'. That's based on my own personal preferences, but the store owner said that whilst the Combustions are his best sellers for mail order, it's the ABZ that sells most in store once people have tried them.
This is EXACTLY the same experience I had! Bass Direct by any chance?
Playing in passive mode sounded a whole lot better after my slow brain finally fired the critical synapses!