Hi Jay, please give us some more details. Is the Seduction hooked up to Otari and a preamp? If so, try it without the Otari hooked up (no input to the Seduction). Also, see if the noise is there with the Otari hooked up but not powered up. Routing the wiring correctly around the motors and transformer is critical to prevent their noise from entering through the wiring (the signal from the heads is tiny).
If it seems to be coming from the Seduction, try hooking up a turntable/cartridge to it. If you don't have one, any source will do just to establish that the noise is not from the Otari.