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  1. Toku

    Topping E50 Review (Balanced DAC)

    I usually use D10b, D10s and E30, and this time I added more E50. As for the sound quality of the E50, I feel that the low-end range has been extended and the amount of bass has increased slightly. I think that's what makes the vocals you point out sound richer. I only play speakers and don't...
  2. Toku

    Topping D10s USB DAC and Bridge Review

    I use the same product. The purpose of use is to input the same source to different devices and perform A / B comparison tests. I don't think this branch plug itself will affect the sound quality, but it may interfere with each other depending on the devices connected in parallel.
  3. Toku

    Topping E50 Review (Balanced DAC)

    The size of the DC plug is 5.5 / 2.1 mm.
  4. Toku

    Topping PA3 Review (Stereo Amplifier)

    In my understanding, the PA3 is a model that has already been discontinued and has been discontinued. It seems that there is still distribution stock in the market, but it is not as popular as products such as AIYIMA. The PA3s is the successor model and one of the two RCA inputs has been...
  5. Toku

    Topping E50 Review (Balanced DAC)

    The issue of maximizing volume when lowering the volume level to -99 when playing DSD on the E50 has been resolved by a firmware update from Topping. Please download the update file from the following. https://www.topping.audio/newsinfo/554010.html
  6. Toku

    Topping E50 Review (Balanced DAC)

    I also purchased the D30 Pro, but returned it because the PCM 384kHz did not play properly and the sound was mixed with noise. I have not received any information that the symptoms have improved since then. I use three E30s that are manufactured at different times. To be honest, the sound...
  7. Toku

    Topping E50 Review (Balanced DAC)

    As soon as the Topping E50 I ordered arrived, I performed the operation test, so I will report the result. Until now, I mainly used E30 and D10s D10 Balanced for DAC, but I bought the newly released E50 because it can also play MQA. Immediately after arriving, I checked all the basic...
  8. Toku

    AIYIMA A05 Review (Budget Amplifier)

    The pop noise issue talks about A05. There is no problem with A07. The measurement conditions are slightly different between the A07 measurement and the A05 measurement. Since A05 is measured with the volume set to MAX, THD + N will be slightly worse.
  9. Toku

    AIYIMA A05 Review (Budget Amplifier)

    I bought this A05 and used it while comparing it with several types of amplifiers such as AIYIMA A07/A04, but the actual sound quality of the A05 is not inferior to them at all. For general use, it is easier to use than A07/A04 due to tone control and BT. Especially when listening at low volume...
  10. Toku

    S.M.S.L DA-9 vs AO200?

    I plugged in some USB audio devices and tried to see what the balance window would look like. The AO200 is displayed as L-R, but there are cases where it is displayed as 1 and 2 or the balance window is not displayed. As you say, only AO200 works in the opposite way to the L-R display. When a...
  11. Toku

    S.M.S.L DA-9 vs AO200?

    I read his post and tested the AO200 many times with two Windows 10 PCs and a USB connection, but the R-Lch was fine. The problem is that the letters L-R are reversed in the balance adjustment of Windows 10. I explained to him that this is a Windows 10 bug and has nothing to do with the AO200.
  12. Toku

    APPARENTLY DEFECTIVE S.M.S.L AO200

    I have tested the AO200 many times with two Windows 10 PCs and a USB connection and the R-Lch is fine. The music players used in Test are Groove Music and Media Player for Windows, and Foober2K and TuneBrowser. Therefore, you should think that there is another cause for AO200 without any...
  13. Toku

    SMSL DA9 - Wait and see, or solid buy?

    It's great that you noticed and pointed out the effects of high frequency noise in measuring DC offset voltage. And trying various things is a very good experience. I hope your report will be of great help to everyone in the forum. I didn't explain much when I first pointed out the problem with...
  14. Toku

    SMSL DA9 - Wait and see, or solid buy?

    What you insist is common sense for those who are knowledgeable about electronic circuits, and of course you should be careful when making measurements. When measuring the DC offset voltage of a switching amplifier such as Class D, it is necessary to consider the high frequency noise contained...
  15. Toku

    Topping D10 Balanced Review (USB DAC)

    My 10b has no such symptoms. The sound quality is exactly the same as the D10s.
  16. Toku

    Dual Merus MA12070 Amplifier Sabaj A20 fully balanced : pictures inside )

    I think that the usage you say is common, but when using the A20a as a power amplifier, raise the volume to -00 and use it.
  17. Toku

    Dual Merus MA12070 Amplifier Sabaj A20 fully balanced : pictures inside )

    Thank you for the inside photo of A20a. The A20a has a slightly higher noise than other products when the volume is maximized, and the noise sounds like switching noise rather than general white noise (also called hiss noise). In the case of a class D amplifier, noise does not increase in...
  18. Toku

    Loxjie A30 Amplifier Review

    The Loxjie A30's MA12070 amplifier chip can output 35W/26V (8Ω, 1kHz, THD+N=1%) power with a BTL connection. The power adapter that comes with the A30 has a 24V output, so the power will drop a little, but your speaker's efficiency is as high as 90dB, so you should be able to drive it reliably...
  19. Toku

    AIYIMA D03 class D amplifier "Subjective review"

    Thank you for the information that the impedance of magnepan drops to 2.6Ω at the dip point. The amplifier chip TAS5624a used in the D03 guarantees operation of at least 2.5Ω in BTL mode in the data sheet. So, in my judgment, I think you can drive magneg pan speakers with DO3. However, this is a...
  20. Toku

    AIYIMA D03 class D amplifier "Subjective review"

    I checked the specifications of Magnepan speakers. Since it is 4Ω/86dB, it should be usable without problems unless it is played back at a particularly loud volume. I can't say for sure because the detailed impedance characteristic graph is unknown, but there should be no problem as long as...
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