Pandoran
Novice Member
Hi everybody, I apologise for the long post but I thought it would be best to be thorough and give you as much information as I can think of right away.
My issue is I'm getting buzzing and humming sounds coming from all 5 of my speakers
I suppose I better start with my setup, I'm equipped with a Sony STR-DG820 amplifier hooked up to 5 Focal Sib and a Cub 2, all of which were bought at the same time about 10 years ago.
The whole installation consists of the amplifier, the speakers, a PS4, an internet TV box and of course the TV, I've also got the router and the landline phone plugged in next to all of this.
I'm encountering two different noises through the speakers, the first is a low hum which is present at all times as soon as the amplifier is turned on, the second noise is a higher pitched buzzing which only appears when media is playing. If I pause or mute it at the source (e.g : muting the TV) this noise disappears, the same thing happens in that brief moment where the sound cuts out when changing channels. Muting or lowering the volume of the amplifier does not stop or change the volume of the buzzing.
At the moment the TV box and the PS4 are connected to the TV through HDMI with an optical cable going from the TV to the amplifier. I've tried plugging everything straight into the amplifier using HDMI and then connecting the amp to the TV with HDMI and that seems to reduce the high pitched buzzing noise but seeing as the amp is quite old that means bye bye any output over 1080p and HDR
I'd been running a 3.1 setup for the past few months until I got around yesterday to buying new cable (2.5mm OFC) and setting up the last two speakers as well as rewiring the previous ones.
The low hum was already present and bearable in the previous setup but seemingly a bit quieter, though I don't know if that's just because of the two extra speakers plus the fact everything is now better set up with a less obstructed sound path.
The new buzzing sound however is just nerve-wracking, it's just loud enough to really mess up those quiet moments in movies and games. This sound also seems to disappear completely once the speakers start outputting a high enough volume
The cable lengths between my speakers are approximately:
15m
9m
9m
5m
1m
Everything is of course wired up correctly.
I've looked up what could be the source of the issue and the frequent problems seem to be grounding loops, interference from AC cables and a worn out capacitor
I've tried plugging speakers back in one by one but the buzz appears as soon as I've plugged in the first one, I've grouped all appliances on to a single power strip but still no change, I've made sure the audio cables aren't tangled up with the power cords and are all to one side.
I read that it's best to avoid running audio cables parallel to AC lines, which I couldn't avoid but there are about 10cm between the two
Just before plugging everything back in I took the chance to clean inside the amp with a can of compressed air and noticed some heat markings on the sides of the amp cover.
I'm also attaching two recordings, one of the first low hum and one of the second higher pitched buzz as well as photos of the inside of the amp, the casing, and my cable installation in hopes that they might help you identify the problem.
Low hum:
Domicile-2
Buzz:
Domicile
Amp casing:
Inside of amp:
Cable installation:
General Setup:
Thanks already for reading the long post and for any help you can give me, I hope I can find a solution even if it means repairing or replacing the amplifier.
My issue is I'm getting buzzing and humming sounds coming from all 5 of my speakers
I suppose I better start with my setup, I'm equipped with a Sony STR-DG820 amplifier hooked up to 5 Focal Sib and a Cub 2, all of which were bought at the same time about 10 years ago.
The whole installation consists of the amplifier, the speakers, a PS4, an internet TV box and of course the TV, I've also got the router and the landline phone plugged in next to all of this.
I'm encountering two different noises through the speakers, the first is a low hum which is present at all times as soon as the amplifier is turned on, the second noise is a higher pitched buzzing which only appears when media is playing. If I pause or mute it at the source (e.g : muting the TV) this noise disappears, the same thing happens in that brief moment where the sound cuts out when changing channels. Muting or lowering the volume of the amplifier does not stop or change the volume of the buzzing.
At the moment the TV box and the PS4 are connected to the TV through HDMI with an optical cable going from the TV to the amplifier. I've tried plugging everything straight into the amplifier using HDMI and then connecting the amp to the TV with HDMI and that seems to reduce the high pitched buzzing noise but seeing as the amp is quite old that means bye bye any output over 1080p and HDR
I'd been running a 3.1 setup for the past few months until I got around yesterday to buying new cable (2.5mm OFC) and setting up the last two speakers as well as rewiring the previous ones.
The low hum was already present and bearable in the previous setup but seemingly a bit quieter, though I don't know if that's just because of the two extra speakers plus the fact everything is now better set up with a less obstructed sound path.
The new buzzing sound however is just nerve-wracking, it's just loud enough to really mess up those quiet moments in movies and games. This sound also seems to disappear completely once the speakers start outputting a high enough volume
The cable lengths between my speakers are approximately:
15m
9m
9m
5m
1m
Everything is of course wired up correctly.
I've looked up what could be the source of the issue and the frequent problems seem to be grounding loops, interference from AC cables and a worn out capacitor
I've tried plugging speakers back in one by one but the buzz appears as soon as I've plugged in the first one, I've grouped all appliances on to a single power strip but still no change, I've made sure the audio cables aren't tangled up with the power cords and are all to one side.
I read that it's best to avoid running audio cables parallel to AC lines, which I couldn't avoid but there are about 10cm between the two
Just before plugging everything back in I took the chance to clean inside the amp with a can of compressed air and noticed some heat markings on the sides of the amp cover.
I'm also attaching two recordings, one of the first low hum and one of the second higher pitched buzz as well as photos of the inside of the amp, the casing, and my cable installation in hopes that they might help you identify the problem.
Low hum:
Domicile-2
Buzz:
Domicile
Amp casing:
Inside of amp:
Cable installation:
General Setup:
Thanks already for reading the long post and for any help you can give me, I hope I can find a solution even if it means repairing or replacing the amplifier.