Hi there.

I wanted to ask if anyone can help me with this Problem.
I am using Event Tr-8, I own them 10+ years, I can't remember when this Problem came up, could be that it's only been there since I live in my new apartment (4 years now). Anyhow, they constantly make a squeaking Noise, always a little different in sound, therefore impossible to blind out and always drawing acoustical attention. Its always noticeable, even still when playing music with low level/amplitude or silent/spoken parts. I have a Anti-Hum Device from Behringer in the Chain which doesnt help either, but when I pull the audio cable, the noise is still present, so it's not from there anyway. Also plugged the Power cable on a single plug and routed it not as usual along the drawer on the back of my table, where all cables and stuff go, but no difference.
I dropped one of the speakers on the floor one time during transport and I imagine the Noise on this Speakers is more present, so could it be something with the (on this speaker more damaged through the impact) shielding? Also, when I change the Amp Level on the backside from "-20db" to "max" (+10db?), there is no change in the volume of the squeaks/noise. Is this just dirty power or what could be the reason?
Could a device as the Furman AC-210 help with this?

https://tinyurl.com/y3bvpwfs

Thanks in advance for any suggestions.

 

I found this Thread

https://www.musiker-board.de/threads/fiepen-auf-krk-boxen-was-tun.626925/

where the Problems seem to be similar and they are talking about Phone Stations as possible reasons.
I just realized I have three of those



on the house across the street. Could those be the source of my problems?

OP also linked a soundfile(turn up your Volume - the level is quite low)


which sound almost exactly like the noise I am getting.

 

Last edited: Mar 27, 2019

first try to clean the cables which you connect to the speaker and the other side which you connect to sound card
try to take some kitchen paper with Acetone
if it not work try to change the cables

 

try other speakers to see if the problem still there

 

I just learned that those anetenna on the roof across the street are 2g/3g/4g Antennas for mobile with 140w-160w power...

 

The Fact that the noise is recognizable louder on the one speaker I once dropped, makes me think the problem is very likely the shielding and it's worse on this one speaker cause of said dropping.
The signal that's interfering is very likely to be coming from those antennas, isn't it?

 

First thing you need to do is disconnect your audio card and check if you can hear the same noise on your headphones FROM the computer. If there is no noise there are some things you can do (everytime you check and make corrections you check for noise):
1) Make sure everything is connected to same outlet.
2) IS there a cable modem or router close to the speakers? Try moving it a little further away and changing its position
2) Disconnect speakers from sound card and check is there any noise coming out of your sound card's headphone output.
3) Disconnect the speakers and check with an old pair of headphones, or another speaker with different wire if you hear the noise. If you don't hear any noise, try with same wires. If you do, you know you have problem with them.
4) Clean your wire connectors and speakers, connect and check.
5) Try another speaker wire.

 

I dont hear it on Phones from the Computer.

1) What exactly do you mean by that?
2) No the Router is like 10m away.
3) There is never this specific Noise coming from my Headphones, neither with or without Speakers plugged in.
4+5) The Noise is always present, also without Audio Cables plugged in.

btw. I am using a Fireface UC.

 

From one AC outlet you connect everything even if you need to use adaptors. Different A/C outlets to power up = ground loops.

Noise is present without wires ? from the speakers just connected to AC outlet? That is not good at all. Those are the worst but some times are the easiest ones to solve. If the noise is coming from speakers just connected to AC outlet the problem obviously is one or the other. The AC outlet OR the speakers.
Go to another AC outlet and try. Go to different rooms in your apartment and try if problem is every AC outlet. If the problem does not go away. Kill the circuit breaker for every other AC outlet and disconnect everything else that is plugged in. Everything is everything. Including any alarm system. If problem goes away, turn on circuit breakers one by one. Checking for noise. If the noise has disappear start plugin back ONE BY ONE everything. Always checking in between.

Edit: Worst because it could be your power lines ( dirty electricity) or speakers. Easiest because it could be something as simple as a defective power adapter plugged in in same path.

 

Last edited: Mar 27, 2019

"Listen to me now and hear me laterrr" ….the speakers are broken

 

Not so fassssst...

 

Last edited: Mar 27, 2019

Thanks Man, makes Sense, I´ll try that tomorrow. But isn't the fact that 4g Sending Station is sitting like 20m away and the one speaker, at which shielding likely was damaged by dropping, is displaying the noise a little louder than the other one, making 4g and bad shielding the most likely cause?

In advance: is there a way to reapir/better shielding?

 

Just because one is making a louder noise does not tell you with 100% certainty that that is the problem. First, you have to eliminate every other possible cause. I would grab the speakers and take them to a couple of friends' and test them before doing all of the above. Better yet. I will go to my local music store or even a store like Best Buy with clean electricity and try them there. Shielding a speaker is not hard. And you don't do it from the inside the speaker because that changes the speaker's frequency response. The shielding is done from the outside. First, find out if that is the problem. If it is shielding that you need, we can take it from there.

 

Last edited: Mar 27, 2019

Just put some WD-40 on the hamster wheel.

 

I suggest you to use headphones, i never had that problem. Your speakers seem to be broken

 

I am not kidding, pack you speaker in aluminium foil and make sure the foil is connected to ground. If this helps it is indeed shielding. But that does not mean the speaker is broken. Just that there is a lot of interference. I had a phone that once every minute made terrible interference on my little PC speakers I use for viewing videos. Other phones don't do that. 20m and 140watts sound awfully powerful.

 

Oh and if the noise does not change when you move the speaker around its axe it is not shielding. A bit like when moving a electric guitar, the hum will change too. So if it is not shielding it might be the start of the power supply of the speakers starting to fail (bad Caps) or just bad caps somewhere else in the speaker. It is normal that one will fail sooner then the other.