Hiss List (S&R)

[Thomas Lund]

Yes the noise is equal with or without input source. So the noise floor of the interface is sufficiently low at the output level I use...

Keeping the noise floor down, and not wasting headroom, is generally a challenge with mixed interfacing. The Adam solution is good, a late, remote-controlled gain setting. Dynaudio Air had this, Genelecs with GLM, and probably others, too.

Reducing the risk of accidental, traumatic sound exposure is another important benefit. Late gain should not be set higher than needed at any point in time.

 

[Curvature]

Hi guys,

I recently bought a pair of HEDD Type 07 monitors and got strange hiss problem. Except hiss pink noise that is common with those speakers, i have this strange loop noise that sound like oscilator. My room is quiet and i can clearly hear this sound from 5ft away.

Both speakers behave the same even though nothing is connected, only power cord. And this sound is synchronized. It behaves as the same loop sound on both speakers in sync.

I tried most of the outlets in the house as well as the garage, everywhere is the same.

I recorded it with my iPhone at a distance of a few centimeters.

Can a Power Conditioner device maybe reduce this problem? What else I can try? I didn't test them in time and now I can't return them to the previous owner.

Listen to the audio HERE

Ground loop or faulty electronics, seems like.


Start a new thread and people here will help you diagnose.

 

[Proximus]

Thank you. I will start a new thread as you suggest, deleting post above.

 

[item]

Thanks for this. I started a similar survey back in 2019, but only got round to including a dozen or so models from what I had on hand at the time. I recorded and quantified hiss at several gain levels - they vary significantly, and differently for each model - noting total deviation and the points at which peaks occurred. It's difficult to simplify the data to a ladder of 'best' to 'worst' because there are many ways to present the data. On balance, the ADAM S series was judged the least intrusive, and the Kali IN8 (Mark 1) and KRK G4 were considered the hardest to live with.

Hiss Ranker (2021 Edition) – Item Audio

You took it much further than I had enthusiasm for - so thanks again. Especially when the Kali Mark II was so much better, it gave me confidence that the era of hissy monitors was finally over! Perhaps I was optimistic - the human race hasn't dialled out DSP self-noise at a sensible price yet. Roll on that day . . .

 

[Lambdalorian]

Where's the list?

I've created a sheet with Sound & Recording measurements of hiss in active loudspeakers: https://docs.google.com/spreadsheets/d/1n62hGAdKptSSKC74_fIT_R7DxFJ60YR2_O9C8x-vYQI/edit?usp=sharing Viewers can comment if something's off or missing.

Where's the list?

 

[somebodyelse]

Where's the list?

Where's the list?

Did you look on the 'Data' tab?

 

[Lambdalorian]

Did you look on the 'Data' tab?

This is all I see:

 

[somebodyelse]

This is all I see:
View attachment 373680

You _should_ see the tabs at the bottom of the page. If you don't then there may be some browser incompatibility, or Google are taking exception to some plugin you're using. The 'Info' tab is selected by default. Click on the 'Data' tab and you'll see the details of hiss for different monitors.

 

[dasdoing]

View attachment 373687
You _should_ see the tabs at the bottom of the page. If you don't then there may be some browser incompatibility, or Google are taking exception to some plugin you're using. The 'Info' tab is selected by default. Click on the 'Data' tab and you'll see the details of hiss for different monitors.

why don't you link directly to the data tab? I would think the document is empty, too

 

[somebodyelse]

why don't you link directly to the data tab? I would think the document is empty, too

Because it's not my thread and not my document. I don't much like Google Docs, but it wasn't hard to find from the link in the OP.

 

[Kyle_PL]

I had in the past Adam A7X, Nubert Nu-Pro A300, and now Genelec 8330A.

Nubert NuPro A300 have much higher self noise (even when nothing is connected to analog In - just selected analog In in nubert's menu) than Digital In (selected from menu - TOSLINK optical or SPDIF COAX electrical). So this measured SelfNoise 26,2dB is on analog Input for sure! ... because ... Nubert NuPro A300 on Digital Input selected, have lower self noise than Adam A7X (measured 20dB) and Genelec 8330A. Even, when Adam A7X have set lower sensitivity than 0dB!!!

So Nubert NuPro A300 on digital input have the quietest self noise i ever noticed in comparison to other good active monitors (Adam A7X on low sensitivity, Genelec 8330A on low sensitivity) even when nothing analog was connected to inputs!

 

[Buckster]

Subjectively - I don't have measurements but ref the following active speakers I have:

JBL LSR 305 - very faint hiss - can't hear unless within about 30cm and then I have to really listen for

Genelec 8030c - extremely low level of hiss - practically would need ear very near to tweeter

JBL LSR 308 II - very disappointing amount of hiss - could hear from listening position 3.2m away from them in living room. Had to change them to Passive Speakers mainly because of the hiss