Greetings everyone!
First of all, I would like to point out I am quite new to receivers in general.
Anyhow, I bought myself an Onkyo TX-NR709, as well as Heco Metas XT501 as the fronts and Heco Center XT31 as the center. Still waiting for the sub and the rears, but, that doesn't have anything to do with my problem (I assume).
Anyhow, I connected all my speakers to the receiver (I didn't bi-amp or bi-wire) and turned the thing on (my receiver is connected with my PC's X-Fi Titanium sound card via a TOSLINK cable). I started by testing if all the speakers work - they do. Then I ran the Audyssey setup for 4 positions. Anyhow, it put the fronts down to about -3dB and the center to about -1dB. It detected the fronts as Full band / big speakers and it set the Center's crossover to 40 hZ. I turned on the Audyssey dynamic EQ and put it into movie mode and tried watching a movie with DTS signal.
I ended up being very satisfied with the sound quality, apart from one thing - when the volume is set to about 60 dB or higher, background noise is audiable during quieter movie scenes.
So, the first thing I tried playing around with were the separate speaker volume controls. No matter what I set the volumes to, when the volume got loud enough, the background noise would appear.
I then checked the manual and stumbled across the so called "LFE", which supposedly helps get rid of the unwanted hum. I tried out all the available options for it, but the hum remained.
My next thing to do was to switch around different play modes, and, while it didn't really help the issue, I found out the noise only happens when the center speaker is active. But the funny thing is, the hum comes from all three speakers, not just the center.
I thought the speaker wires might be damaged or something alike, which is why I tried hooking up the center speaker to one of the front speaker wires, as well as a different wire all together, and the same thing persisted.
After that, I moved onto the input signal itself and tried out both the optical inputs on the receiver with 2 different toslink cables and the problem is still here.
Right now, I'm running out of ideas on what to do. I've only used the Audyssey setup for 4 positions and I will try running it for all 8 later on today, after reading that it's supposedly a better idea to do so, but, I'm having doubts that will sort out anything. I have an HD6990 as my graphics card and I'll try running the signal to the receiver via an HDMI cable as well, just in case there might be something wrong with my sound card, although, I kinda doubt it. Will deffo report about it later on today.
Oh, one thing I left out - the humming noise doesn't appear until I tell the receiver to actually play something. But after I stop playing whatever material it might be, the hum goes on until I either turn the receiver on and off / switch to a different playmode and back.
So, if anyone has any ideas, any help will be greatly appreciated
. I hope the unit itself isn't faulty and if it turns out to be, I'm sure I'll be swapping it for the same model, as other than the problem I'm having, it is an amazing piece of equipment. Love the upscaling to 1080p from pretty much anything as well :P.
Update: I just tried connecting the receiver via the soundcard on my motherboard, the problem is still present, so, I doubt running it through HDMI on my graphics card will help either.
Update 2: I decided I'd trick the receiver into thinking I have a subwoofer connected to it and set the L/R/C crossover to 80 hZ for all of them. The hum is gone. Success? I just hope it doesn't have any weird side-effects when I actually do get the subwoofer.
First of all, I would like to point out I am quite new to receivers in general.
Anyhow, I bought myself an Onkyo TX-NR709, as well as Heco Metas XT501 as the fronts and Heco Center XT31 as the center. Still waiting for the sub and the rears, but, that doesn't have anything to do with my problem (I assume).
Anyhow, I connected all my speakers to the receiver (I didn't bi-amp or bi-wire) and turned the thing on (my receiver is connected with my PC's X-Fi Titanium sound card via a TOSLINK cable). I started by testing if all the speakers work - they do. Then I ran the Audyssey setup for 4 positions. Anyhow, it put the fronts down to about -3dB and the center to about -1dB. It detected the fronts as Full band / big speakers and it set the Center's crossover to 40 hZ. I turned on the Audyssey dynamic EQ and put it into movie mode and tried watching a movie with DTS signal.
I ended up being very satisfied with the sound quality, apart from one thing - when the volume is set to about 60 dB or higher, background noise is audiable during quieter movie scenes.
So, the first thing I tried playing around with were the separate speaker volume controls. No matter what I set the volumes to, when the volume got loud enough, the background noise would appear.
I then checked the manual and stumbled across the so called "LFE", which supposedly helps get rid of the unwanted hum. I tried out all the available options for it, but the hum remained.
My next thing to do was to switch around different play modes, and, while it didn't really help the issue, I found out the noise only happens when the center speaker is active. But the funny thing is, the hum comes from all three speakers, not just the center.
I thought the speaker wires might be damaged or something alike, which is why I tried hooking up the center speaker to one of the front speaker wires, as well as a different wire all together, and the same thing persisted.
After that, I moved onto the input signal itself and tried out both the optical inputs on the receiver with 2 different toslink cables and the problem is still here.
Right now, I'm running out of ideas on what to do. I've only used the Audyssey setup for 4 positions and I will try running it for all 8 later on today, after reading that it's supposedly a better idea to do so, but, I'm having doubts that will sort out anything. I have an HD6990 as my graphics card and I'll try running the signal to the receiver via an HDMI cable as well, just in case there might be something wrong with my sound card, although, I kinda doubt it. Will deffo report about it later on today.
Oh, one thing I left out - the humming noise doesn't appear until I tell the receiver to actually play something. But after I stop playing whatever material it might be, the hum goes on until I either turn the receiver on and off / switch to a different playmode and back.
So, if anyone has any ideas, any help will be greatly appreciated
. I hope the unit itself isn't faulty and if it turns out to be, I'm sure I'll be swapping it for the same model, as other than the problem I'm having, it is an amazing piece of equipment. Love the upscaling to 1080p from pretty much anything as well :P.Update: I just tried connecting the receiver via the soundcard on my motherboard, the problem is still present, so, I doubt running it through HDMI on my graphics card will help either.
Update 2: I decided I'd trick the receiver into thinking I have a subwoofer connected to it and set the L/R/C crossover to 80 hZ for all of them. The hum is gone. Success? I just hope it doesn't have any weird side-effects when I actually do get the subwoofer.


























