The finalised design did not incorporate a power source and so had a 9V (positive outer) coaxial jack on the rear. This allowed for the use of a wall adapter, the EBP-9LC, a carrying sleeve which held 6 primary C cells or rechargeable cells with the ability to charge in-situ. Alternatively, the AC D50 was available which attached to the rear of the D50 / D5 and allowed it to be powered from AC at 110/120/220/240 V 50/60 Hz 9 W with a DC output of up to 500 mA. The AC D50 also allowed line level audio out, presented as two RCA jacks.