Oukkidoukki
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Have you checked the software volume control? The volume for my PO100 is reduced right down low each time I changed it to a different USB port (both in Windows and Linux).I'm returning my SMSL PO100 (2024 edition) because something is not ok. I get very low digital output level - I can barely hear the music when amplifier is cranked up to 100%. Tried with different sources (Macbook Pro and Google Pixel 8 Pro), also different outputs (Optical and Coax). Has anyone else experienced this?
Have you checked the software volume control? The volume for my PO100 is reduced right down low each time I changed it to a different USB port (both in Windows and Linux).
Yes, I did check - changing the volume on the MacBook Pro or the phone does not have any impact on the output
This is actually strange.Yes, I did check - changing the volume on the MacBook Pro or the phone does not have any impact on the output
The sound is very low on both the phone and fiio m11 plus Qobuz and apple music.This is actually strange.
You have to check the volume setting of both the system and the software you are using to play the music.
same behaviour on any device I test with Tidal and SpotifyThe sound is very low on both the phone and fiio m11 plus Qobuz and apple music.
just ask them? They got even amazon supportI recently discovered that a firmware update (V3.84) is available for the PO100. According to the changelog, it addresses the low volume issue:
SMSL Audio Official -Professional audio product manufacturer
Foshan ShuangMuSanLin electronics Co., LTD. founded in 2009 which located in Shenzhen, China. And our branch company VMV Technology(HK) Company Limited registered in HK in 2013. Our company is specialized in the audio DAC, stereo headphone amplifier, power amplifier, and with own R&D...www.smsl-audio.com
Unfortunately, I encountered problems trying to update using the "XMOSUSBDACfu" tool. It throws errors about a missing driver DLL.
Has anyone successfully updated the firmware for the PO100?
The sound is very low on both the phone and fiio m11 plus Qobuz and apple music.
At the moment I am assuming that the PO100 of your two is not defective, but has a fixable problem. It seems that a reduced low volume setting is not being reset.same behaviour on any device I test with Tidal and Spotify
It's not that you would hear a difference switching to 96kHz, right?Okay, I finally figured out how to update the firmware, and I can now confirm that the update resolves the low volume issue. Here are the instructions:
Prerequisites:
Step-by-Step Firmware Update Instructions:
- PC running Windows 10 or later
Now you can connect the SMSL PO100 to your phone or any device you want to test it with. Make sure the volume is all the way up on your phone or computer to get the full output. Hope this helps!
- Connect your SMSL PO100 2024 to the PC using the provided USB-C cable.
- Open Device Manager on your PC, locate the SMSL PO100 device, and uninstall any previously installed drivers by right-clicking the device and selecting "Uninstall Device."
- Download the latest Windows driver for SMSL PO100 2024 from the SMSL website:
https://www.smsl-audio.com/upload/portal/undefined/SMSLUSBAudioDriver.zip- Extract the ZIP file and install the driver "XMOS_USBAudio_v5.70.0_2024-11-08_setup"
- Download the latest firmware (v3.84) and update tools for SMSL PO100 2024 from this link:
https://www.smsl-audio.com/upload/portal/undefined/PO100FW384.rar- Unzip the downloaded file
- Open the firmware update tool named "XMOSUSBDACDfu" from the "XmosUSB" folder inside the extracted archive.
- In the update tool, select the firmware binary file named "PO100_MQA_3.84.bin" that is included in the extracted files.
- Click "Start" in the tool and wait for the update process to complete. Do not disconnect the SMSL PO100 2024 during this step.
- Once the update is finished, click "Exit" to close the firmware update tool.
Before the update (in v3.83), the SMSL PO100 2024 had volume control in the control panel, and it was set to -40dB by default.
View attachment 417847
After the update, the volume controls are now removed from the control panel, and I assume it is now fixed at 0dB.
View attachment 417848
Unfortunately, after the update, there is still an issue when streaming at 96kHz, from time to time, the soundtracks stutter with Pixel 8 Pro & Tidal. There is no stuttering when playing at 44.1kHz or 48kHz.
I'm sure everyone would hear a difference at 96kHz if it stutters.It's not that you would hear a difference switching to 96kHz, right?
you can replace that value with the threshold of your hearing, though and it still is true.I'm sure everyone would hear a difference at 96kHz if it stutters.
you can replace that value with the threshold of your hearing, though and it still is true.
If the playback jerks or stutters, every hearing threshold and every value is irrelevant.Just for everything outside of what you can hear, it wouldn't be audible
Unfortunately, after the update, there is still an issue when streaming at 96kHz, from time to time, the soundtracks stutter with Pixel 8 Pro & Tidal. There is no stuttering when playing at 44.1kHz or 48kHz.
Thanks, this helped - I have a minimal Windows 10 machine that didn't have appropriate app to handle rar files, so didn't know what to do with them initiallyOkay, I finally figured out how to update the firmware, and I can now confirm that the update resolves the low volume issue. Here are the instructions:
Prerequisites:
Step-by-Step Firmware Update Instructions:
- PC running Windows 10 or later
Now you can connect the SMSL PO100 to your phone or any device you want to test it with. Make sure the volume is all the way up on your phone or computer to get the full output. Hope this helps!
- Connect your SMSL PO100 2024 to the PC using the provided USB-C cable.
- Open Device Manager on your PC, locate the SMSL PO100 device, and uninstall any previously installed drivers by right-clicking the device and selecting "Uninstall Device."
- Download the latest Windows driver for SMSL PO100 2024 from the SMSL website:
https://www.smsl-audio.com/upload/portal/undefined/SMSLUSBAudioDriver.zip- Extract the ZIP file and install the driver "XMOS_USBAudio_v5.70.0_2024-11-08_setup"
- Download the latest firmware (v3.84) and update tools for SMSL PO100 2024 from this link:
https://www.smsl-audio.com/upload/portal/undefined/PO100FW384.rar- Unzip the downloaded file
- Open the firmware update tool named "XMOSUSBDACDfu" from the "XmosUSB" folder inside the extracted archive.
- In the update tool, select the firmware binary file named "PO100_MQA_3.84.bin" that is included in the extracted files.
- Click "Start" in the tool and wait for the update process to complete. Do not disconnect the SMSL PO100 2024 during this step.
- Once the update is finished, click "Exit" to close the firmware update tool.
Before the update (in v3.83), the SMSL PO100 2024 had volume control in the control panel, and it was set to -40dB by default.
View attachment 417847
After the update, the volume controls are now removed from the control panel, and I assume it is now fixed at 0dB.
View attachment 417848
Unfortunately, after the update, there is still an issue when streaming at 96kHz, from time to time, the soundtracks stutter with Pixel 8 Pro & Tidal. There is no stuttering when playing at 44.1kHz or 48kHz.