Tube Phonostage Causing Rumble and Noises


Hello, I am desperate in need for advices and help.

I have a Aesthetix I/O Eclipse (one power supply) that I acquired new in 2009. It started to make the SVS SB16 Ultra subwoofer rumble a few months ago. I sent it back to Aesthetix, they performed a bunch of upgrades and replaced 4 tubes in gain stage one claiming these would help with the noises. 

When I got it back three months later, the rumble got a bit better but it was still there. Then Aesthetix sent me a new set of tubes claiming there were specially selected and tested for low noise. However, they didn’t eliminate the rumble.

Then I played a record to during the test, the unthinkable happened. When the phonostage is idle, there was just rumble. As soon as a signal was passed from the phono, the sub went crazy, it produced some subsonic noise that made the room shake. I then connected the phono to a tube integrated amp and I heard a loud distorted noise through my LS 3/5A.

The strange thing is that I have no issues using the I/O with my Apogee Fullrange without the sub.

I would appreciate any shape or form of advice/help.

Thanks in advance and Happy New Year!

agharion

Thanks misstl. Jim White did mention RIAA curve boost. Jim also said it was impossible to eliminate the rumble to zero although I was assured the rumble was eliminated before I paid for the service. I don’t mind a little rumble but no one can listen to records while the entire room is shaking.

This is most puzzling.

One more idle thought -- turntables are mechanical devices and subject to wear over time -- just like your car tires and anything else mechanical. Might be worth trying a different turntable or two (preferably relatively new) in your setup and see how that affects things. It could be you have a worn bearing or some other issue, such as a suspension problem, as others have mentioned.

Not as bad as yours, but I had a version of this occurring when playing my turntable, utilizing the built in tube phono stage in my preamp.  The solution for me is to turn off the subwoofer that is near my turntable when playing vinyl.  No problem leaving the 2nd sub on that is some distance away.

You might try turning off your subwoofer/subwoofers as a test.

Thanks again misstl. I get the rumble when the turntable is not in use.

my turntable is about 6 or 7 years old. Lightly used because I listen to digital most of the time. 

Thanks, jetter. If I can’t resolve the issue, that’s the only option. Luckily Aesthetix makes good phono. It is just as enjoyable with or without a subwoofer.

To me, the primary issue is not whether I use the sub or not. I am deeply concerned that the I/O is generating a subsonic frequency that could damage speakers with cone drivers, like what happened to the Rhea.