External temperature Wiim amp ultra

[Firefl16]

Wondering about the temperature on he outside surface of my Wiim amp ultra. It's getting petty warm there ....after some hours operating.
Should I be worried?

 

[QuarryHunslet]

Wondering about the temperature on he outside surface of my Wiim amp ultra. It's getting petty warm there ....after some hours operating.
Should I be worried?

What temperature is it?

 

[Goodnews]

Wondering about the temperature on he outside surface of my Wiim amp ultra. It's getting petty warm there ....after some hours operating.
Should I be worried?

Although the Wiim Amp Ultra should power my speakers without any problems, it gets significantly warmer than the Class D amp from another company that has to power 18" bass speakers. The solution: Fosi offers fans.

The Wiim Amp Ultra TPA3255 chip implementation is used with an LS with 99 dB and gets so warm that it heated up the Mac Mini that happened to be standing on it, which I find extremely surprising. The other Class D amps that ran before the Wiim Amp Ultra... hardly generated any heat at all.

 

[mrehorst]

Did you put the computer on top of the other amp, too? The Wiim case is its heatsink. If you put stuff on it, it won't dissipate heat well and will warm up more than if its exposed to free air.

This reminds me of the old joke: "doc, it hurts when I do this", to which the doctor replies "don't do that".

If you had a big old Krell class A amp with giant heatsink fins, would you cover the fins with something?

Is that a fan under the amp? How does it get any air to blow?

 

[Firefl16]

What temperature is it?

I just tried to measure with my IR fever thermometer. It reeds 41.2 celcius which is ok i guess. I don't have any other means of measuring this` is the setup:

 

[HansD-NL]

Although the Wiim Amp Ultra should power my speakers without any problems, it gets significantly warmer than the Class D amp from another company that has to power 18" bass speakers. The solution: Fosi offers fans.

The Wiim Amp Ultra TPA3255 chip implementation is used with an LS with 99 dB and gets so warm that it heated up the Mac Mini that happened to be standing on it,

It just happened, the Mac Mini wandered in and placed itself on top, like a cat does.
No but seriously, don't do that. (See info from others in this thread.)

which I find extremely surprising. The other Class D amps that ran before the Wiim Amp Ultra... hardly generated any heat at all.

Other Class D amps have no computer board (streaming module), touch screen and other things the Amp Ultra has. It needs to breathe (no need for a fan) and is monitored en protected against overheating.

 

[HansD-NL]

I just tried to measure with my IR fever thermometer. It reeds 41.2 celcius which is ok i guess. I don't have any other means of measuring this` is the setupView attachment 30334

A little tight placement but nothing to worry about, 41 celcius is fine.

 

[Goodnews]

It just happened, the Mac Mini wandered in and placed itself on top, like a cat does.
No but seriously, don't do that. (See info from others in this thread.)


Other Class D amps have no computer board (streaming module), touch screen and other things the Amp Ultra has. It needs to breathe (no need for a fan) and is monitored en protected against overheating.

Could the aspect I wrote about be taken into account—by chance—and furthermore, the amp should operate at 99 dB efficiency LS.

Usually, the WAU stands separately and has infinite space and air circulation for "cooling." It gets too warm for what it has to deliver in relation to the other LS mentioned above.

To put it plainly, it reminds me of the joke: I only want to read what suits me.

 

[Patagonia]

You can check the internal temp using this address: https://wiimip/httpapi.asp?command=getStatusEx

Replace Wiimip with the IP of your Amp, it will give you like five lines of values one is CPU Temp; it shows another reading but don't remember what is it, the explanation is somewhere in the forum.

My Amp Ultra runs hot also, now in summer after 2 hours normal to low volume listening is showing 46c for CPU, never seen less than 38c.

 

[HansD-NL]

Could the aspect I wrote about be taken into account—by chance—and furthermore, the amp should operate at 99 dB efficiency LS.

What (other) aspect(s)? The Amp Ultra should and does operate your speakers as you already mentioned, don't understand what your question is?

Usually, the WAU stands separately and has infinite space and air circulation for "cooling." It gets too warm for what it has to deliver in relation to the other LS mentioned above.

Your initial message mentioned the Mac Mini on top of it so that was where you got responses about. Already reacted why it gets warmer than other non streaming Class D amps.
And you never told us what "too warm" means, how are we suppose to interpret that?

 

[Wiimer]

I just tried to measure with my IR fever thermometer. It reeds 41.2 celcius which is ok i guess. I don't have any other means of measuring this` is the setup: View attachment 30334

I believe a temperature of 41°C on the top panel is perfectly acceptable.

These are the measurement results I obtained here.

Room temperature 27 degrees,
music played for 1 hour.

[Amp Ultra] Top: 39°C, Bottom: 38°C
(CPU temperature: 53°C)


Play music for 7 hours.

[Amp Ultra] Top: 46°C, Bottom: 42°C

 

[trbt]

FWIW, I also find Amp Ultra running surprisingly hot and it doesn't seem to depend on output power.
I don't find it a problem, but have to consider when making placement choices.

 

[Fiskomp]

FWIW, I also find Amp Ultra running surprisingly hot and it doesn't seem to depend on output power.
I don't find it a problem, but have to consider when making placement choices.

It's a bit of a joke, the Wiim Amp Ultra isn't a human, it doesn't need to be 36.6 degrees Celsius. There's no need to worry about temperatures up to 50 degrees Celsius.

 

[PaintItBlack]

The WiiM Amp Ultra is my first Class D amp and I expected to run cooler than my previous AB amp, and in deed it does run cooler, but you can feel it warm, pleasantly warm in these colder months. I guess it is around 40 degrees Celsius after 1 hour of use. I think this is pretty normal. This makes me wonder how the PID temperature regulation advertised in WiiM's web works. If the measured temperature is the controlled variable, which is the manipulated variable here ? Is the amp's output power adjusted to mantain the temperature at a precise setpoint or just within safe limits ?

 

[QuarryHunslet]

The WiiM Amp Ultra is my first Class D amp and I expected to run cooler than my previous AB amp, and in deed it does run cooler, but you can feel it warm, pleasantly warm in these colder months. I guess it is around 40 degrees Celsius after 1 hour of use. I think this is pretty normal. This makes me wonder how the PID temperature regulation advertised in WiiM's web works. If the measured temperature is the controlled variable, which is the manipulated variable here ? Is the amp's output power adjusted to mantain the temperature at a precise setpoint or just within safe limits ?

Mine has been running for more than two hours, and at its hottest point (the rear panel by the ethernet port), it measures 30 degrees C, and the internal temperatures are, "temperature_cpu": "43", "temperature_tmp102": "41".

Room temperature is 15 Degrees C.

 

[PaintItBlack]

Mine has been running for more than two hours, and at its hottest point (the rear panel by the ethernet port), it measures 30 degrees C, and the internal temperatures are, "temperature_cpu": "43", "temperature_tmp102": "41".

How do you read such temperatures ?? Is there any way to open something like a SSH session to the amp ? Or does it have a local web server ?

 

[QuarryHunslet]

How do you read such temperatures ?? Is there any way to open something like a SSH session to the amp ? Or does it have a local web server ?

The external temperature was read using an infrared thermometer, and the internal temperatures are from the device status page.

 

[harkpabst]

How do you read such temperatures ?? Is there any way to open something like a SSH session to the amp ? Or does it have a local web server ?

Right here in this thread:

You can check the internal temp using this address: https://wiimip/httpapi.asp?command=getStatusEx

Replace Wiimip with the IP of your Amp, it will give you like five lines of values one is CPU Temp; it shows another reading but don't remember what is it, the explanation is somewhere in the forum.

Any mention of "hot" or even "too hot" is pointless unless an actual temperature reading is provided.

Any temperature value is pointless unless the measuring method is specified. As has been said before, external case temperatures way above 40⁰ C are absolutely no need to worry.

And finally, comparing temperatures is pointless unless the ambient temperature is given.

 

[PaintItBlack]

Right here in this thread:


Any mention of "hot" or even "too hot" is pointless unless an actual temperature reading is provided.

Any temperature value is pointless unless the measuring method is specified. As has been said before, external case temperatures way above 40⁰ C are absolutely no need to worry.

And finally, comparing temperatures is pointless unless the ambient temperature is given.

Thanks for the info. In my case after playing Qobuz for 1 hour at volume 45 and room temperature 19 degress Celsius, the readings are:
"temperature_cpu": "43", "temperature_tmp102": "41"
So pretty normal and about the same I felt "by hand".

 

[QuarryHunslet]

Thanks for the info. In my case after playing Qobuz for 1 hour at volume 45 and room temperature 19 degress Celsius, the readings are:
"temperature_cpu": "43", "temperature_tmp102": "41"
So pretty normal and about the same I felt "by hand".

The case temperature would typically be around 10 degrees C lower than the internal temperature readings.