30 ft rca run too long for a phono to preamp?


Hi, I am having vibration/feedback issues with my current turntable location and would like to move it to the other end of the room. Is a 30ft connection from the phono (vp-130) to the preamp ( slp-98 ) too long?

Thanks,
Mike
hanaleimike

Showing 2 responses by almarg

Both components have only unbalanced connections.

Thirty feet is really pushing it, but fortunately the phono stage output impedance is only 100 ohms (which in fact is considerably lower than the preamp's output impedance of 440 ohms). That should be low enough to eliminate the possibility of upper treble rolloff due to interaction of cable capacitance with the output impedance.

The remaining concern would be noise pickup. There is no way to predict that other than by trying it, since it is dependent on the noise environment of your particular setup. But in addition to the noise environment, success or failure would be dependent on the quality of the shields in the particular interconnects you would be using (both shield coverage and shield resistance), so I would try, if possible, to arrange trials of several different cables, with return privileges.

Regards,
-- Al
Audiolui -- Although it wasn't made completely clear in the original post, and I too was initially confused, the connection in question is between phono stage and preamp, not cartridge and phono stage.

Regards,
-- Al