despite concerns raised by previous review, I found this 'generic' equivalent power-adapter (while not being the recommended [unavailable] Tascam - unit) more than adequate. ...problems with '50Hz 'buzz' mentioned by previous purchaser are likely caused by un-shielded cables, particularly of issue with the Channel 3/4 3.5mm plug input. 'get grounded' man. both with the right cable and simple realities of life. putting your finger on the pulse of it, wires included, reveal the shortcomings of the human condition (as much as the obvious 'interference' picked up by a loose, un-shielded cable). it 'Hz' for us all dude ...and we just deal with it via solution not complaint.