That means in most setups (at normal listening levels) the distortion of the sub out should not be audible?
My WiiM Amp tests
- Thread starter onlyoneme
- Start date
I would say so. We usually listen within the range of just a few watts.
Looks like the number or reports about whining/humming noise of the Amp increases. It's obviously not an issue of just my unit, it's something much more common. Pity as I was assured that it has been resolved and will not happen with production units.
Yes, and it seems more people are reporting it on the ASR forum instead of here on the WiiM forum.
Yes, I meant these ones mainly.
Steve Woodhouse
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I hope they get this sorted.
It’d be a real shame if an otherwise superb product was spoiled by one, presumably easily-fixable, issue.
It’d be a real shame if an otherwise superb product was spoiled by one, presumably easily-fixable, issue.
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Hi Team,
Thank you for your valuable feedback. Here are some updates:
Power Consumption Issue: The recent firmware had a bug leading to higher power consumption. We've identified the cause and will release an update next week. The new version will reduce idle mode power consumption to about 3W.
Humming Noise: A very small number of units from our first manufacturing batch exhibit a low humming noise due to the power transformer. This issue has been resolved in subsequent batches. If your unit is affected, please contact us by sending us a feedback ticket.
Your ongoing support is greatly appreciated.
Thank you for your valuable feedback. Here are some updates:
Power Consumption Issue: The recent firmware had a bug leading to higher power consumption. We've identified the cause and will release an update next week. The new version will reduce idle mode power consumption to about 3W.
Humming Noise: A very small number of units from our first manufacturing batch exhibit a low humming noise due to the power transformer. This issue has been resolved in subsequent batches. If your unit is affected, please contact us by sending us a feedback ticket.
Your ongoing support is greatly appreciated.
JohnnyAbbati
Member
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- Nov 25, 2023
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- 13
Thank you very much @WiiM Support for your transparency! This ecourages me to trust in your product support 
Steve Woodhouse
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Hi WiiM.
This product has only just arrived Europe.
Can you confirm whether Amazon UK’s allocation may be affected, or are we safe to order from them?
Many thanks.
Could this be related to
"Turning off an HDMI-connected Samsung ‘The Frame’ TV shuts off sound to the loudspeakers (as we’d expect) but a low-level randomised ‘put-put-put’ sound (noise interference?) continues to spill from the KEF KC62 subwoofer. I have to switch the WiiM AMP over to another input to make it stop...This subwoofer ‘noise interference’ also shows up sometimes – but not always – after having used the TOSLINK input." from
https://darko.audio/2023/11/wiim-amp-review-flying-high-on-value-for-money/
It might be related I think.
Was this fixed by the first firmware update?
WiiM Amp Firmware Release Note
This firmware update is being rolled out in stages, with devices updating sequentially over the next few days. For a list of known issues currently being addressed, please refer to the provided link. Our team is diligently working to resolve...
faq.wiimhome.com
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Hi Steve,
Certainly, ordering from Amazon UK is safe. The issue affects only very few units, with even fewer in the UK. Thank you!
Brantome
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Don’t think there is one
The ES9018 datasheet, show one type digital filter only, with selectable fast/slow roll off.
Different from ES9038, that has 7 filters.
I can be wrong but I think it's a characteristic of the chip, the only dac with 9018 I had (SMSL 100), didn't give filter selection
Mr Ee
Major Contributor
In case anyone is really interested in the 9018, I found this page quite interesting, about the benchmark dac2.
For those who don't like clicking links, try searching for "benchmark dac2 9018" or "inside the dac2 digital processing".
@onlyoneme is your home assistant integration also working with the amp?
