No Naim
Novice Member
Hi all!
My first post but a long time user of the forums knowledge base. I am having quite a frustrating time with what I believe to be a ground loop in my new AV/hifi system. I will try to supply all relevant details. It is as follows
Yamaha RX775 AV Receiver connected via pre-outs to Naim Nait 5i AV input.
Into the receiver I have via HDMI - sky box, Apple TV. Hdmi out to TV.
Into the Nait 5i I also have a Rega Dac.
I have a BK subwoofer connected to the AV receiver and also connected on the high level input directly to the speaker posts on the back of my speakers - as per Naims instructions.
So.. To begin with I had a hum through the front speakers on ALL inputs on the Nait. After help from Naim I connected a small piece of wire from a chassis screw on the Nait to the outer of one of its unused RCA sockets. Bingo! It cleared up all hum on all inputs *except* the AV input. When I remove the interconnects between AV receiver and Nait it disappears.
I tried running an additional second piece of wire from Nait chassis to the phono ground post on the AV receiver and that cleared it up just a bit but not completely. I have also tried a maplin Ground loop isolator between amp and av receiver but it didn't really help at all.
I have tried plugging, unplugging every single component of my system and starting with the bare bones. All I can conclude is that the hum is there even when there is nothing plugged into the AV receiver and the only connection is to the Nait. I *think* The hum does change a bit and can get better or worse depending on what else is plugged into the AV receiver but it definitely is there when the only connection is to the Nait via preouts.
I have also tried experimenting with all combinations of using the same/different wall sockets to no avail.
Therefore, I really am at the limit of what I feel I can try next. I'm wondering about getting a different receiver but not even sure if that would help. If anybody could offer any help and save my sanity I would be extremely grateful.
Many thanks in advance
James
My first post but a long time user of the forums knowledge base. I am having quite a frustrating time with what I believe to be a ground loop in my new AV/hifi system. I will try to supply all relevant details. It is as follows
Yamaha RX775 AV Receiver connected via pre-outs to Naim Nait 5i AV input.
Into the receiver I have via HDMI - sky box, Apple TV. Hdmi out to TV.
Into the Nait 5i I also have a Rega Dac.
I have a BK subwoofer connected to the AV receiver and also connected on the high level input directly to the speaker posts on the back of my speakers - as per Naims instructions.
So.. To begin with I had a hum through the front speakers on ALL inputs on the Nait. After help from Naim I connected a small piece of wire from a chassis screw on the Nait to the outer of one of its unused RCA sockets. Bingo! It cleared up all hum on all inputs *except* the AV input. When I remove the interconnects between AV receiver and Nait it disappears.
I tried running an additional second piece of wire from Nait chassis to the phono ground post on the AV receiver and that cleared it up just a bit but not completely. I have also tried a maplin Ground loop isolator between amp and av receiver but it didn't really help at all.
I have tried plugging, unplugging every single component of my system and starting with the bare bones. All I can conclude is that the hum is there even when there is nothing plugged into the AV receiver and the only connection is to the Nait. I *think* The hum does change a bit and can get better or worse depending on what else is plugged into the AV receiver but it definitely is there when the only connection is to the Nait via preouts.
I have also tried experimenting with all combinations of using the same/different wall sockets to no avail.
Therefore, I really am at the limit of what I feel I can try next. I'm wondering about getting a different receiver but not even sure if that would help. If anybody could offer any help and save my sanity I would be extremely grateful.
Many thanks in advance
James