This is the correct replacement AC power cable for the Marantz PMD-620. Have a long day of recording ahead of you and worried your batteries aren't going to last? An AC power cord lets you plug into the wall and forget about it. It's perfect for that...

DM246 AC Adapter. Allows you to run you DM246 on electricity from the wall outlet. 

Have a long day of recording ahead of you and worried your batteries aren't going to last? An AC power cord lets you plug into the wall and forget about it. It's perfect for long days in court, multi-hour conference meetings and doctor/lawyer's dictation...