WiiM Amp discussion

[ninetylol]

I think you guys are making a mountain out of a molehill.

Most electric devices emmit some Sound, if you put your ears close enough. At least mine is not audible under any normal use case.

 

[morillon]

My WiiM Amp tests

Well, not finished. Yet. But let's start with some facts. The Amp seems to be a class D BTL H-bridge amp with a single power rail (find someone smarter than me for an explanation), and with an advanced temperature monitoring through some sensors to deliver "optimal performance and safety" which...

forum.wiimhome.com

 

[lordhumungous]

I think you guys are making a mountain out of a molehill.

Most electric devices emmit some Sound, if you put your ears close enough. At least mine is not audible under any normal use case.

Nah . My topping , pa5 (cheap)and 7 plus ,Apollon hypex amps are DEAD SILENT .

 

[mskis]

I think you guys are making a mountain out of a molehill.

Most electric devices emmit some Sound, if you put your ears close enough. At least mine is not audible under any normal use case.

Mine is obnoxious and I can hear it from across the room. It is also very warm when it is supposed to be in standby; it’s obviously wasting a lot of power. How is that acceptable?

 

[antcollinet]

Mine is obnoxious and I can hear it from across the room. It is also very warm when it is supposed to be in standby; it’s obviously wasting a lot of power. How is that acceptable?

It isn't. In standby it needs to be consuming <0.5W to comply with EU regs.

(Unless by standby you just mean "not playing music")

 

[ninetylol]

Mine is obnoxious and I can hear it from across the room. It is also very warm when it is supposed to be in standby; it’s obviously wasting a lot of power. How is that acceptable?

Thats worse than mine then.

 

[Inertiaman]

Mine is obnoxious and I can hear it from across the room. It is also very warm when it is supposed to be in standby; it’s obviously wasting a lot of power. How is that acceptable?

Don't suppose you have a Kill-a-watt to place between the outlet and the amp to quantify the power draw in standby?

 

[Yorkshire Mouth]

It’s interesting that some units are noisier than others. Perhaps this will be fixed, but with a lot sold already, you have to wonder if there’ll be a recall, or an offer of a replacement if you want one.

For me, I’m not insistent that it’s silent, as long as I can’t hear it in normal use. At the moment, this is the only option available which fits my needs, but at least one other will be available by the time I’m ready to buy.

 

[Kabeltrommel]

It’s interesting that some units are noisier than others. Perhaps this will be fixed, but with a lot sold already, you have to wonder if there’ll be a recall, or an offer of a replacement if you want one.

For me, I’m not insistent that it’s silent, as long as I can’t hear it in normal use. At the moment, this is the only option available which fits my needs, but at least one other will be available by the time I’m ready to buy.

It's absolutely normal for coilwhine to be different loud / intense on different devices, unfortunately. Same goes for modern notebooks. However, I havent experienced that "trend" on HiFi-equipment.

 

[ninetylol]

Got another problem though. Theres no preamp setting on the wiim amp when using peq. On the other WiiMs you can (and should!) put max. Volume setting down to have some digital headroom for eq. Not here.

 

[onlyoneme]

True. There is no way to limit the output power with a current FW / app.

 

[Yorkshire Mouth]

Can anyone think of a reason why that’d be necessary, or might it just be an easily-fixed oversight?

 

[onlyoneme]

Reducing the risk of damaging speakers if they wouldn't handle the max power which the Amp can deliver, for example.

 

[antcollinet]

Got another problem though. Theres no preamp setting on the wiim amp when using peq. On the other WiiMs you can (and should!) put max. Volume setting down to have some digital headroom for eq. Not here.

You can sort of work around that by only bringing down the peaks rather than trying to lift the nulls. As long as all the filters sum to zero or negative gain, everything is fine.

You shouldn't be trying to lift the nulls in any case.

 

[antcollinet]

Reducing the risk of damaging speakers if they wouldn't handle the max power which the Amp can deliver, for example.

How many amps are there that implement a power limit?

 

[onlyoneme]

How many amps are there that implement a power limit?

I don't know, but since all WiiMs use a digital volume and a digital volume limiter, this could easily be implemented in the Amp as well.

 

[ninetylol]

You can sort of work around that by only bringing down the peaks rather than trying to lift the nulls. As long as all the filters sum to zero or negative gain, everything is fine.

You shouldn't be trying to lift the nulls in any case.

Well with a negative preamp you wouldnt lift any nulls, which is the problem but I know what you mean.

 

[ninetylol]

Got another problem though. Theres no preamp setting on the wiim amp when using peq. On the other WiiMs you can (and should!) put max. Volume setting down to have some digital headroom for eq. Not here.

Speaking of the devil

 

[Kabeltrommel]

My unit just arrived. It makes a classic electrical noise directly fron the beginning if the setup process. The other wiim products didnt have this issue. The noise seems to come from the psu behind the power cable input

 

[JohnnyAbbati]

I ordered two amps, which both arrived today.
Both of them have the whining noise. But on one unit it is definitely louder than on the other.
Only thing I am missing is gain setting per input. Otherwise it runs pretty good.