WiiM Ultra buzz noise when using: USB DAC + Trigger simultaneously

[pjorgenunes]

Hi,

Firstly just wanna say I'm thrilled with my WiiM Ultra (will do a full review in a short while ).

For now I have one issue:

When I connect the trigger out of WiiM Ultra to trigger in of my AMP (Fosi Audio ZA3) and have my USB DAC (Topping D10S) simultaneously I got a kind of low buzz + RF like interference in my speakers.

Strangly there is no noise if:
1 - I use trigger connection but with internal DAC;
2 - I don't use trigger connection and external USB DAC.

The problem only arises when I use both simultaneously...

Any ideas?

PS - The topping USB DAC is powered via the USB connection itself. I already use it directly to WiiM's USB, via unpowered USB HUB and external powered USB HUB and the behaviour is always as noted.

BR,
Paulo

 

[WiiMer SJ]

Make sure the Trigger cable is properly seated at both ends.

 

[pjorgenunes]

Make sure the Trigger cable is properly seated at both ends.

Thanks. It is (tried two different cables). The strange thing is that it only happens when External DAC + Trigger. With trigger only it's all ok.

PS - Never tried with a mono trigger cable... but I've always used stereo ones in several equipments (including this setup without using external DAC) and it always worked before.

 

[WiiMer SJ]

Thanks. It is (tried two different cables). The strange thing is that it only happens when External DAC + Trigger. With trigger only it's all ok.

PS - Never tried with a mono trigger cable... but I've always used stereo ones in several equipments (including this setup without using external DAC) and it always worked before.

Definitely try a mono cable.

 

[pjorgenunes]

Definitely try a mono cable.

Will be my next attempt

 

[WiiMer SJ]

Will be my next attempt

Don't forget to report the results. Too often the lesson to be learned is lost.
Good luck!

 

[pjorgenunes]

Don't forget to report the results. Too often the lesson to be learned is lost.
Good luck!

For sure. Either it solves it or not

 

[pjorgenunes]

Meanwhile,

Anybody is using trigger out and an USB DAC simultaneously?

BR,
Paulo

 

[adias]

Ground loop?

 

[pjorgenunes]

Ground loop?

Strange between USB DAC (which is powered by the USB itseld) and trigger...

Each one alone doesn't produce the noise... :S

 

[adias]

Strange between USB DAC (which is powered by the USB itseld) and trigger...

Each one alone doesn't produce the noise... :S

If in your pipeline any of the components has a 2 prong power plug, try to reverse it. If that first reversal does not work, reverse it back and try another one.

 

[pjorgenunes]

If in your pipeline any of the components has a 2 prong power plug, try to reverse it. If that first reversal does not work, reverse it back and try another one.

I will try that

 

[WiiMer SJ]

There may be some insight to be had in this thread.

WiiM Pro + Fosi ZA3 Setup using 12v Trigger Issue and Workaround

Hello all, first thread here on the forum. Already submitted a support ticket to WiiM, but figured to make this post for everyone to discuss. Forgive my formatting. I have 2 WiiM Pro's, 2 Fosi ZA3 amplifiers, and 4 different 2.5mm to 3.5mm cables (2 TS cables, and 2 TRS cables^). I have noticed...

forum.wiimhome.com

 

[Maurizio]

Meanwhile,

Anybody is using trigger out and an USB DAC simultaneously?

BR,
Paulo

Hi @pjorgenunes
I have the trigger out of my Ultra connected to trigger in of my Topping D70Pro Sabre. The trigger cable (50 cm) is stereo. Everything works perfectly. When I don't play music I have absolute silence. Absolutely no noise. Not even the smallest

 

[pjorgenunes]

Hi to all,

Firstly I want to thank you from your inputs.

I've kind of partially solve the issue.

When I was experiment the "non complete insertion of the trigger cable on the FOSI AMP" I've noticed that, when my hand touched the trigger cable or move to some different position the noise reduced and even disappeared.
So I believe I was picking up some RF noise of some kind (supposely from the WiiM Ultra or the Topping D10S USB DAC).

I've now no noise and all working great.

The next step will be to try a a well shielded trigger cable or so.

 

[WiiMer SJ]

When replacing the trigger cable, a 2 conductor (mono) cable is all that should be required. Match the cable to the plug size and configuration.
Some cable management tips to consider:
Avoid coiling. Chose cables of appropriate lengths.
When crossing cables of different voltages and signal types, do so at right angles.
Do not bundle cables of different voltages and signal types together.