[ogorskli]

Hello. I was hoping someone here might help me in fixing my speaker/receiver problem.

I just recently bought a pair of Dynavoice Magic F-6 speakers, and also a used receiver (yamaha rx-v1800). When I wired them together, and turn on the receiver, I can hear a faint air sound from the tweeters. If I put my air really close so my hairs touches the tweeters, it gives off a crackling low noise sound. Like when you touch a microphone, kind of. When I put the volume on mute, the air sound disappears.

There's also a very faint disturbance that follows the music, and the sound from the speakers sound kind of metallic, which you can hear especially when there are guitars in the music.

Example music which really triggers the metallic sound:
https://www.youtube.com/watch?v=l2IVOBi4jIs
https://www.youtube.com/watch?v=Kq-r4ZUpels
https://www.youtube.com/watch?v=xyvFhrDzLfY

The disturbance/metallic sound is really there all the time though, like some very very faint buzzing that follows the music.

I should mention that I only have a speaker and a receiver. The receiver is connected to a desktop computer with an audio cable.

Hope someone can help me.

[ogorskli]

Here is link to speaker: https://www.dynavoice.se/en/artiklar/magic-f-6.html

Here is link to receiver: https://www.hifiengine.com/manual_library/yamaha/rx-v1800.shtml

[Elizabeth]

It is normal to be able to hear a faint airy sound from tweeters up close.

[JohnR]

There's also a very faint disturbance that follows the music, and the sound from the speakers sound kind of metallic, which you can hear especially when there are guitars in the music.

Could be a damaged driver, probably a tweeter. Try playing one speaker at a time to see if it's one or both speakers. It's not clear if you are using the actual youtube feed to evaluate, but that could be causing distortion anyway, so use lossless files from your computer.

[richidoo]

Probably the computer is the source of the noise, as they are notoriously noisy, not ideal for playing audiophile music without an upgrade DAC. To test this, mute the receiver and then disconnect the audio cable at the receiver input jacks then unmute to see if that stops the noise. If it does stop the noise, then the cure will be to get a quieter computer sound card. Maybe a USB DAC like AudioQuest Dragonfly DAC or something like that.

If, when you disconnect the computer the noise persists, then the computer is not the source of the noise. Try the "Pure Direct" mode on the receiver. This powers off the unnecessary internal digital circuits to reduce noise to the minimum. It disables all the DSP functions, making the receiver act like a totally analog integrated amp. It should be quieter, but it's hard to know by how much, or whether you can hear the difference. It's a midrange receiver, so there could be an audible improvement from using Pure Direct mode, in noise and/or in tone.

Lastly, as a Hail Mary idea, for a test make sure the computer and receiver are plugged directly into the same electrical outlet (with no power strips or power conditioner, etc) so they share the same power circuit and same ground. Make sure the electrical outlet is wired correctly with an outlet tester if you have one. If no change you can put it back to original power outlets. Different power circuits can cause noise if the power circuits have loose connections or low quality power strips, etc. Worth a try if the other two have no effect.
Good luck and welcome to AudioCircle

[ogorskli]

Elizabeth:
I am sorry that I am "complaining", and I am a noob when it comes to speakers and amplifiers, but find it hard to believe that new speakers that are not played in are supposed to sound like this. You can hear the metallic sound most of the time, but especially at high notes. Please excuse me for being afraid of breaking my speakers.

JohnR:
I listen on Spotify. The noise comes from both speakers.

richidoo:
I did as you said in the first paragraph, but the air sound was still there.

As for Pure Direct mode, it has been on all the time.

Both receiver and speakers are plugged into the same electrical outlet, right into the wall. I don't have an outlet tester, so that's not possible for me. It's a new apartment, built in 2018, but who knows.

I decided to dabble a little with which source to plug into the receiver, like the desktop, a laptop or my mobile phone, and it seems that the laptop and mobile phone are making less noise, but with the mobile phone there's a new noise that's there all the time no matter if I play music or not.

[richidoo]

Thanks for reporting back on your experiments ogorskli
You have 3 posts now, so you will not require administrator clearance for your posts anymore, they will publish immediately.

Here is the service manual for your receiver.

Definitely something wrong with the receiver. It is used, so maybe the previous owner passed along his problem. The metallic tonality suggests too much harmonic distortion which is likely an unhappy amplifier circuit. Plus two different types of non linear noise, something's broke, imo.

Try a different analog input, just in case the noise is related to a particular input. I don't think this will help, but it's easy.

Try a digital input by using the coax or optical inputs, if you have a digital player and cable available. This will bypass the rx's analog input / preamp stage and any associated analog circuit noise. If that stops the noise and metallic distortion then the problem is in the preamp stages and the mute switch is after the preamp. You could find a USB to SPDIF converter to connect your PC instead of using the analog input.

The "new noise" from the phone is probably related to the cellular radio in the phone. Put the phone into Airplane mode to shut off the cell and wifi radios. Hopefully that will stop the new noise.
Good luck!