My WiiM Amp tests, chapter 2
- Thread starter onlyoneme
- Start date
joostdh
Member
I returned my "PCB_version": "2" Amp which I bought in December to Amazon.de. The whine/hiss/high pitched was (just) audible enough that I could hear it from my couch and I knew it would get to me. Today I received a new PCB version 5 and if I put my ear to the amp I can hear something but honestly it is now a non-issue.
The swapping of the analog ports is an easy way to spot the difference: the white rca post is now above the sub out vs the red one on the older version.
I really wanted a new WiiM aAmp because besides the power supply pitch, I was extremely happy with the amp. I replaced a Denon stereo receiver (DRA-800H) which never really convincingly drove the Dali Oberon 7 speakers I have. My teenage daughters heard the difference within 10 seconds: more resolution and better bass (very noticeable on kick drums). Exactly the things that stood out for me too.
The swapping of the analog ports is an easy way to spot the difference: the white rca post is now above the sub out vs the red one on the older version.
I really wanted a new WiiM aAmp because besides the power supply pitch, I was extremely happy with the amp. I replaced a Denon stereo receiver (DRA-800H) which never really convincingly drove the Dali Oberon 7 speakers I have. My teenage daughters heard the difference within 10 seconds: more resolution and better bass (very noticeable on kick drums). Exactly the things that stood out for me too.
in the "common places" of the hifi...
the aspect-the impression of more definition immediately perceptible would worry me a little because I often have a poorly highlighted treble etc and a fatigue to come... on the other hand, especially for 3 voices like yours, the effectiveness of this type of class d is often quite obvious on the bass, like their uses on sub etc
you will tell us about the use over a somewhat long period
;-)
I'm new to the community because I just received my WiiM Amp 2 days ago from Amazon US.
No hum, no issues I noticed. Didn't even knew previous versions had issues
Gotta say, this is my first time using an amp like that and it's blowing my mind—never used an amp with an app interface and all the controls available.
Code:
"project_build_name": "WiiM_AMP", "Release": "20240124", "FW_Release_version": "", "PCB_version": "5",No hum, no issues I noticed. Didn't even knew previous versions had issues
Gotta say, this is my first time using an amp like that and it's blowing my mind—never used an amp with an app interface and all the controls available.
Brantome
Major Contributor
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- Oct 20, 2022
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To be honest, you’re probably not alone in that unless you frequent forums like this and Audiosciencereview…No hum, no issues I noticed. Didn't even knew previous versions had issues
Mr Ee
Major Contributor
IMO it looks fine, but someone else might confirm or deny it. @harkpabst ?
@onlyoneme,
Are LPF and HPF both -18db/oct?
And was the cause of the noise a steep slope?
Thank you so much.
Filter steepness is definitely different, telling from your own measurements. With the current firmware it appears to be a 4th order Linkwitz-Riley filter now (which is much more common and most probably favourable over an 8th order filter).
Since my replacement amp was delivered just yesterday (PCB_version 5) I didn't spend time for measurements, yet. But I will at some point I'm the near future. I didn't measure anything on the previous unit (PCB_version 4).
Once again, great work! Thanks a lot!
PS:
The slopes look good to me. The slight rise above 5 kHz is absolutely negligible. It's still down by ~80 dB at 20 kHz and no sub will play that high, anyway.
Since my replacement amp was delivered just yesterday (PCB_version 5) I didn't spend time for measurements, yet. But I will at some point I'm the near future. I didn't measure anything on the previous unit (PCB_version 4).
Once again, great work! Thanks a lot!
PS:
The slopes look good to me. The slight rise above 5 kHz is absolutely negligible. It's still down by ~80 dB at 20 kHz and no sub will play that high, anyway.
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It's rather -24 dB/oct I think.
I can't see well with presbyopia
Glasses are my best friends tooI can't see well with presbyopia
Hi all, first post here I have been looking at PCB versions mentioned on here and the various issues people are having. I got my amp on new year's eve from Amazon UK. It has PCB version 4 and there is an obvious high pitch continual whine from the unit itself but so far it only seems to be audible to me with my ear close to the unit. I haven't experienced any other unwanted sounds so far. It would be amazing to hear of any known differences between PCB 5 and version 4. These tests are really interesting so thanks for your efforts.
