+2 on the phono cable. Drove me nuts with my Manley Steelhead. Changed tables and arms and cables until It is now silent. does the level of hum change at all if you move the phono cable around. that might help isolate if its due to proximaty to a hum source, or possibly a small break in the cable sheathing. You just have to work through a process of elimiation.
- 19 posts total
Fromunda, I had the exact same problem as you. It was phono stage related. I tried cheater plugs, not much difference. I ended up purchasing the Granite Audio 502 Ground Zero and that seems to have worked for me, with some experimentation of settings. Let's just say that I am no longer cognizant of the hum at higher volumes without a signal. Maybe it is still there, I don't know, but I've not fixated on it since the 502. I've moved on. All the above advice is good. Clean you interconnect contacts, too. they could be dirty with poor contact. Lastly, I had an expensive Kondo KSL silver interconnect short circuit internally. Kondo repaired, and it is as good as new now. That caused a very loud hum different from your's.Still, clean the contacts.
Was your previous phono preamp a tube unit too? Hum is not uncommon using tubes in high efficiency systems. Try a SS phono stage and see if the hum goes away. It doesn't have to be an expensive one, you can find a SS phono preamp for under $100, it should at least let you know whether or not the Fosgate is the problem.
I have something like this as a back up to test for issues like this. In my experiences, I prefer solid state for very low level signals like vinyl. Tube line stages and amps are great, but you have to be careful with tube phono stages. The more efficient your speakers are, the more likely you are to hear tube artifacts in low level amplification.
- 19 posts total