AKAI 4000DS MkII irriating hiss when not even playing
I've had an Akai 4000ds MkII for a couple months now and I absolutely adore it and have made some great recordings with it but lately the amount of hiss has been driving me crazy. Now I would expect a considerable amount of hiss from analog tape as it's an unavoidable consequence of the format but the real kicker here is that the hiss occurs when the tape isn't even playing, when there's no tape even loaded into the machine. As long as the machine is on and the monitor switch is set to tape I get this awful noise that sounds a bit like pouring rain. I'm pretty sure this hiss does't exist in the recordings I have made but it occurs in the playback section somewhere. The machine is in good mechanical order and has been lubricated and the heads have been cleaned with TEAC head cleaner since I got it but I have no idea what the machine would have been through before I got it in October 2013 although I suspect it was used in a home to make backups of LPs as It came with a bunch of homemade tapes of classic albums. Anyways does anyone know what might be causing such an evil sound in my machine?