help me remove noise from my vinyl setup

i heard back from Grado that the cartridge "has .4 mv output and an output impedance of 47K."

from the very limited knowledge i've so far picked up, it seems that a SUT wouldn't work with that impedance....

The Grados have a pretty sketchy reputation of excess noise or hum with many tone arms and setups in general. If you can get it right they are suppose to be really good for the money, but if your getting noise from a grado its supposedly very hard to go the other direction from my understanding. I own that table, with KAB everything as well, its dead silent.

I have owned grado, had them in the past and they were noisier, however never heard them on this table. I would borrow another cart first and see what it does electrically being hooked up into the signal first, you don't even have to set it up, just mount another cart to a new headshell and mount it to the arm connect the headshell wires. See if the noise is gone then its the grado having an issue, load, acoustic arm resonance whatever.

By the way I currently have a .4 mV moving coil myself on that table combo, works silent, so its nothting to do with low output specifically, but possibly that cart. directly.

Good luck

thanks for your insight. trying another low-output cartridge is not really an option i have, unless i buy one. i have some high-output Grado's and there is less noise.

so you think it is the cartridge and not the phono pre-amp? both are grados ;) i'm pretty sure the pre-amp is definitely picking up some interference. if you listen carefully in my sample above you can hear some crackling noise, which i did not hear when i put the pre-amp into someone else's setup...

it could be a combination of both :\

Well there are some electrical shield devices and sticky sheets made, one comes from Percy audio I think, its fairly expensive, its a metal sheet that can be formed to fit around transformers, and the chassis panels etc...

This could knock out the rf noise, also cables and placement, I would move the phono amp away from everything possible temporary and see, also the ground plug or electrical ground in your socket could be creating noise. Its hard to pin down, because there are so many factors that you could be getting noise. Also if the outlet your hooked up to in the house is out of phase(hot swapped with the Neutral etc...) could cause issue, this could be reversed using a ground cheater and flipping your plug on the phono amp over to just check, then fix the outlet itself if this is a cause of noise.

If you have a Ground pin on your preamp, or phono amp try to lift it and see, also try connecting your tone arm wire with and without the ground wire and see. I have also taken an extra piece of wire and attached it to the phono amp ground and then touched other screws on the amp, preamp, cd player whatever to see if a better common ground could be found to eliminate more background noise, I have heard changes.

I use mu-metal sheeting to protect my MC step up amp from hum/noise induced from external EM fields emitted from amplifiers or other nearby transformers.

I roll the mu metal sheeting into a oval tube large enough to insert my step up device into and it works like a charm. Hum/noise otherwise audible is gone.

The mu metal sheet needed cost around $35 in my case.