Best Way for my TT to reach my Pre-Amp!?

To those recommending Blue Jeans cable for TT's...

They are a decent cable... but for the next step up, for not much more money I would recommend trying the Analysis Plus Oval One.

To my ears it was a definite upgrade.

Assuming the turntable cable is hard wired and not a plug-in, buy a decent "audiophile," short (.5m orr 1m) cable and some gold-plated joiners and try them.  You will either hear a diminishment or not.  Don't assume the worse.  If you are using a MM, you may.  If you are using an MC cartridge, you probably will not.

I used my own cables to extend the TT cable as well as purchased RCA cables. They both resulted in noise and hum in the phono stage of my Marantz. 

I wouldn't use longer cables from phono to pre.  Get the Marantz closer.

Is this the first time you have hooked up the table... or possibly the first time to the Marantz?

Sounds like bad ground, or dirty/loose connection.

 Try this for a read:

https://audiokarma.org/forums/index.php?threads/rega-planar-2-ground-hum.192497/

The crazy thing is this was a brand new P3 and I’ve used it without any trouble for a few months, then all of the sudden rumble from nowhere, so I moved the whole setup thinking the speaker was too close to the TT only to make the TT too far away from the Marantz and still rumble and now hum when the phono input is selected, and the TT isn’t even powered on! I have tried two different amps as well and the hum is still there, and I have a hum X on the amp power line plugged directly into the outlet in the wall. 

Geez so many people on here don't have a clue about what they are talking. This is the last place I would go to for advice. Educate yourself and then do some serious research instead of bouncing around the internet forums and taking in advice from there. Most of them are just plain morons.

Balanced interconnects can be much longer than unbalanced and they are designed for a long run, an equipment with balanced input/output required. Nowadays many manufacturers of the phono stages can offer a model with balanced output (Gold Note Ph-10 for example), such phono stage can be far away from a preamp/amp and connected with balanced cables. Zu Audio in USA is the manufacturer of excellent phono cables (including balanced interconnects).  

Geez so many people on here don't have a clue about what they are talking. This is the last place I would go to for advice. Educate yourself and then do some serious research instead of bouncing around the internet forums and taking in advice from there. Most of them are just plain morons.

Wow
Hey thanks
That's so useful to the OP.
Just had a great idea.
Why don't you try and educate all of the morons here Oddio.
I am sure we would be fascinated by your insight.....

The crazy thing is this was a brand new P3 and I’ve used it without any trouble for a few months, then all of the sudden rumble from nowhere, so I moved the whole setup thinking the speaker was too close to the TT only to make the TT too far away from the Marantz and still rumble and now hum when the phono input is selected, and the TT isn’t even powered on! I have tried two different amps as well and the hum is still there, and I have a hum X on the amp power line plugged directly into the outlet in the wall.

In your current thread about power conditioners I noticed the following statement:

I have a Sony OLED TV, Marantz preamp processor, Atoll amp, cable box, nighthawk router, Xbox, Rega P3 TT, and powered 12” subwoofer with 2 stereo speakers. I have 2 Monster JP 800 surge protectors if nothing else to plug everything into.

My suggestion is that to isolate the causes of the rumble and hum problems you start by simplifying the setup as much as possible. Disconnect and unplug everything except what is needed for phono operation (turntable, prepro, amp, main speakers but not the sub). Remove the two Monster Cable surge protectors (some surge protectors can do funny things with grounds) and plug the prepro, turntable, and amp directly into a wall outlet. See if the problems are still present. If not, reconnect the remaining items one by one.

Also, just a thought but cable boxes have been known to cause hum in audio systems, especially if something is amiss with the ground connection of the cable outside the house.

Good luck. Regards,
-- Al

Thanks Al! I do t know why I didn’t think of getting back to basics. I’ll troubleshoot and report back. 

If you're so concerned about capacitance of your long cables then you'd better buy an MI cartridge that is NOT SENSITIVE to capacitance at all ! 

This cartridge is Grado (for example). My Signature XTZ continue to impress me every day even against some expensive LOMC. 

All,

The TT is turned OFF for the following troubleshooting. 
I play the system fine on every other input. As soon as I turn the input on the Marantz to Phono, there is hum. 
How can this be? 

Pick up the marantz and place it one foot 12 inches in all directions. 
use a temporary stand if you have to. 
Does the Hum change ? 

You need a very well shielded phono rca cable from your tt to your phono input. There must be a third line just for ground (wire). As i said it's a bad idea to use unbalanced phono cable for longer than 1,5 meters (even this is too much). What is your cartridge? 

You can try external phono stage with short cable from tt to this stage and longer cable from phono stage to your line input. 

Ok I think we are onto something.

First, the noise didn’t change when I moved the Marantz around. Second, I have a second Marantz (same one) that I tried and the noise was exactly the same.

Third, even though the TT was turned off I decided to remove the phono cables extensions and it got rid of the hum. I’m assuming it got rid of the ground hum since there is no ground wire coming from a Rega table to connect. 
HOWEVER, even though the hum is gone, in the phono selection of my Marantz when I crank it up there is a smooth hiss like the ocean. Is this inherent in all phono or will an external preamp that is of higher quality get rid of this?

Finally, the rumble problem is still there but that’s different issue. 
Also,I don’t have an external phono preamp to try at the moment. I will be ordering one soon though. 

Guys,
I may have figured it out and I would like to get your opinion. The P3 mass is 11 g. My Nagoaka MP-110 cartridge is 6.5 g with only a 6 for dynamic compliance. Using an online calculator this puts the resonant frequency at a 15-16 Hz!I believe it’s supposed to be around 10 Hz correct?
Do you agree this is most likely my problem?

It appears that the Rega P3 is normally fitted with a Rega RB300 tonearm, which according to the listing at Vinylengine.com has an effective mass of 11.5 grams. Also, since the cartridge is made in Japan its dynamic compliance is probably specified on the basis of 100 Hz, rather than on the 10 Hz basis that is usually used by the calculators, such as this one. I would expect that its compliance at 10 Hz is **probably** in the rough vicinity of 10 or so.

Plugging a compliance of 10 into that calculator in combination with a tonearm effective mass + cartridge weight of 11.5 + 6.5 = 18 grams results in a calculated resonant frequency of 11.86 Hz, which is within the 8 to 12 Hz range that is often considered to be ideal.

But note the word "probably" in my statement. It’s hard to say for sure.

Good luck. Regards,
-- Al