6-Way Dubbing (DR-DX7) The DR-DX7 is a triple combo unit -- a large-capacity 250GB HDD, which stores up to 473 hours of programmes, and a multi-format DVD recorder are innovatively combined with a MiniDV recorder. Edit and dub footage from your MiniDV video camera in native DV format. The unit allows six-way dubbing -- between any two of the three recorders. (DR-MX1) The three combined recorders provide six dubbing options. You can dub video content between any two of HDD, DVD, and VHS.