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  1. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I agree. Yep. I did my best with my limited conditions :) My initial goal was to replace the Sonos due to audio interruptions while streaming. Ordered the Wiim and the PA5 II. Tested it and was disappointed with the sound. At the same time I’ve discovered that I could downgrade the Sonos from...
  2. cptsantos

    Topping PA5 II Stereo Amplifier Review

    This experience makes me think we (@amirm :)) could try to measure frequency response at different power levels. We could also try to measure spikes at different frequencies to try to get an idea of the capacity of the amp to deliver the full energy of the original waveform. Does this make sense?
  3. cptsantos

    Topping PA5 II Stereo Amplifier Review

    The EQ was at zero and loudness off. No other settings are available in Sonos S1. I preferred the Sonos over the PA5 II + Wiim Pro Plus to start with. Then I decided to test the two amps with the same source and there is a difference. I subjectively noticed a more “empty” low frequency region on...
  4. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I can do all the tests you want on the Sonos. That’s the one I’m keeping as I returned the PA II and the WiiM today.
  5. cptsantos

    Topping PA5 II Stereo Amplifier Review

    The B setup was the Sonos Amp alone (steaming internally).
  6. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Ok we have to be careful here because the streamer comparison recordings (wiim + Sonos vs Sonos internal streamer) were level matched at a lower level than the previous PA5 II vs Sonos Amp tests.
  7. cptsantos

    Topping PA5 II Stereo Amplifier Review

    The songs were streamed from Apple Music. I don't think I can have access to the original waveform. I have 3 of them in FLAC but can’t guarantee that they are the same master as the Apple Music master.
  8. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I guess you’re right by the definition of distortion.
  9. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Or … different non linear response in the frequency range with these speakers. Is it possible?
  10. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Thanks for doing this! Happy to know I'm not completely crazy :)
  11. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Tested this according to your suggestion. Level matched with pink noise, iPhone 110cm from both speakers. Source were local flac files. Lossless audio recording on the iPhone. 3 different tracks. WiiM on Sonos Amp vs Sonos Amp internal streamer. (Pay attention to the names as the PA5 II vs...
  12. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I checked the EQ settings on Sonos. Bass 0, Treble 0, Loudness off. Pressed the reset button several times :D
  13. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Yes. If there was changes it was a placement difference of less than 1cm.
  14. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Ok. I’ve spent the morning doing more proper tests. Tested (and recorded) Sonos Amp vs Topping PA5 with the same source via RCA line in. Source was my iPad playing lossless Apple Music. Microphone was my iPhone. Level matched using pink noise at 70db. Both speakers 110cm away from the...
  15. cptsantos

    Topping PA5 II Stereo Amplifier Review

    Ok, I have to dig into matching levels. My Sonos Amp is the older white one (former ZP120) so the power should be nearly the same (around 55W at 8ohm). i believe there is no room correction on this Sonos Amp. I reset it anyway before the comparison. Also possible if we’re talking about the...
  16. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I admit it was not a “properly controlled double blind procedure”. I was more focused on the end result: the satisfaction I get listening to music using both systems. I was just trying to understand what’s really going on. When I see similar frequency response charts and similar multi tone...
  17. cptsantos

    Topping PA5 II Stereo Amplifier Review

    1) True. Still, comparing between the 2 setups allows me to hear a difference. 2) No. I know it was not a very scientific approach. Regarding gain I’ve noticed that to compensate what was lacking in setup A I ended up putting more volume when listening. When I buy things it’s because I’m...
  18. cptsantos

    Topping PA5 II Stereo Amplifier Review

    I have ordered a WiiM Pro Plus and a Topping PA5 II and have been testing this combo for a few days now. Let’s call this setup A. My goal was to compare setup A with my Sonos Connect Amp (ZP120) (setup B). Both setups are connected to a pair of Wharfedale Diamond 220s. Tested sources were...
  19. cptsantos

    Topping PA5 II running hot on idle

    A little common sense please. @DTTOM37 said “cold to the touch”. I don’t need to measure the exact temperature in degrees to know that my PA5 II is definitely not “cold to the touch”. I’m also pretty sure @DTTOM37 or any other person wouldn’t consider it “cold to the touch” if he/she touched it.
  20. cptsantos

    Topping PA5 II running hot on idle

    Thanks. That’s similar to my setup. WiiM Pro Plus > PA II > Wharfedale Diamond 220s 8ohm. Volume controller by the WiiM.
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