Hum when connecting Teac nt-505 to supernait 2 via rca to din

Is there a fault with the interconnect?  Can you try a different one?

Could you have two source components both of which have an earth connection to 0V?

Could you have no source components that have an earth connection to 0V?

Following on from Huge's first point, can you remove the AVR connection from the SN2 (leave the nt505 connected). Does the hum go ?.

If so then either use a ground loop isolator between AVR and SN2 or feed the digital output (toslink optical) from your AVR into the Teac and use that as a DAC instead. It should sound better too. 

From the description - could be a grounding loop. If that’s the case follow Huge’s advice...

If, however, you eleiminatge all exogenous culprits, and the hum persists, you may be in for an isolating transformer.

If you don't have a naim source connected as well as the teac then you could have a ground problem. Try connecting a wire to the ground connection on the back of the SN2 and the other end to the earth pin of a 13a plug then plug it into a socket.

This pretty much got rid of a similar problem I had when using a chord qutest with my SN2.

My avr connection via rca does not cause the hum. The hum starts when i use my rca to din from teac streamer. All my sources are using a 3 pin plug accept for my dspeaker antimode for sub connect via rca to supernait2. And ican affirm out of this 3 equipment its the teac via din causes the problem as i took the trouble to test 1 equip at a timeconnectin to SN2.

Another possibility is the rca to din int. On first day of purchase the rca side came off while pluggin out. My retailer put a temporary fix on the rca connection with neutrik brand rca with the naim int. Will get the replacement by this week. Hopefully thats the due cause.

I also have all my unused rca input on sn2 capped.

Not so sure about the above diagnosis.

Have you tried unplugging everything and just connecting your Teac and SN2?

In a Naim system each box with an internal power supply has a safety earth but the system ad a whole needs one and only one signal earth which was normally through a CD player, the streamers and DAC have a switchable signal earth so they can provide a the signal earth in the absence of a CD player or not if a CD player is absent. The hum you discribe sounds like an earth problem and as your not using a Naim source the signal earth in your system is unknown. The hum is possible if there are two signal earth connections or none, the number of pins in the plugs isn’t a sure indication that the signal return is connected to earth. By connecting just the streamer and nothing else you’ll be testing whether you have none or two signal earth connections when the av gear is connected too.

Plenty of good questions and advice here.  One more question though; Where is the Teac positioned?  Is it sat on or right above the Supernait2?

I had hum issues with my SN2 and a non-Naim source (LP12). Couldn't make the hum go away (though was reduced by swopping rca-rca i/c to rca/din). My dealer's SN2 had the same issue (in his shop). The SN2 seems to have an earthing/hum issue with non-Naim sources. I switched to 200/202 and the issue was gone.

I suspect (as others have mentioned) it's the additional earth provided by adding the Teac network player into the mix which looks to be the issue.

If the OP just follows some simple logical trouble shooting then this will determine if it's an additional earth issue which can be dealt with quite easily or if something else is amiss that needs further work.

Just finish trying changing rca/din to rca/rca int. The hum didnt go away. Have to rule out bad int. 

The teac streamer is placed beside the sn2. Not stacked. 

I cant just trade in for this amp for a 200/202. It took me a year plus of to get this. Trade in and top-up will cost alot for me. Now am feelin regret for not gettin the hegel h190. Tot i did my due diligence to read up all the review sn2 prior to purchasin.. haiz....

can anyone help me with all tat is required to use the ground of this thing..

Ok good - that's one thing ruled out.

Next, disconnect the AVR from the SN2 and leave the NT505 connected. Does the hum stop ?

If yes then you have an earth loop. To stop this, get a ground loop isolator to fit between the AVR and SN2 - an example of is in the picture below.

Hi James thanks for the advice. Is this the best i could get out there and not degrade the sound?. And also please tell me more about how do i connect it?

+1 what James says.  This is what I do.  The isolator functions like an RCA extension cord — simple.  I have never found any exotic variants of the $35-45 one shown in the pic.  

Solved my issues completely.  Hum was related to my CATV system; but it did not show up until I added the Naim CD player.

Nick

My equipment causing the hum is the my network streamer (main source for music listenin). Therefore am going to connect this isolator direct to my music streamer output than rca to din int to the sn2. Is this correct?? And this wont degrade the naim rca to din interconnect?

The streamer is not likely causing the hum - it's connecting the two bits of earthed equipment to the SN2 that appears to be causing the hum. Have you disconnected the AVR from the SN2 to see if the hum disappears - do this first.

If the hum stops then you have an earth loop and you need to break this loop. You do this with a ground loop isolator - there may be a small loss of quality so I'd connect it between the AVR and SN2.

The other way you could do this is take the digital output from the AVR and use the digital input on your NT505 instead of using the normal analogue (RCA) outputs from your AVR.

Diconnecting the avr from the sn2 does not stop the hum.

Ok - then it sounds like we have another problem. Is it only the Network player and AVR connected to the SN2. Any other sources connected ?

What happens if you move the Teac away from the Supernait?  Or swap sides?  Just wondering if it's picking up hum from close proximity to the rather large transformer inside the SN2.

I have the dspeaker antimode for my subwoofer. Got this remove too but hum is still there. Strongly affirm its my teac nt-505 giving the hum. 

I have not try swapping side. Will try that tomorrow.