The MAB4QM features neck-through-body construction on mahogany with quilted maple top attached to a maple and purplehearth neck with a 24-fret rosewood fingerboard with pearl dot position markers. Components include an Accu-cast B-IV fixed bridge with 19mm string spacing, and a pair of EMG (P/J) pickup's channeled through an active preamp EQ, a plastic nut and gotoh tuning machines.
For 1992 the bridge was changed to a Wilkinson 4-string and the headstock was changed to a matching color.
The MAB4FM is a similar model with flamed maple top. The MAB5BE is a related five string model with bird's eye maple top.