I used these tools to punch holes in the original case, works great: https://www.amazon.de/BGS-Locheisensatz-565-9-tlg-Kunststoffkassette/dp/B000PTQ9YM

Hello, many thanks for your help and making a video. I was talking about the Bluetooth connection, and mistakenly gave the example when switching the unit off and on. I think that feature was in the M15, but maybe I messed it up with another unit. To reproduce the Bluetooth problem: With...

Hello, thanks again for the info, but I think you are wrong. The volume *goes down* when disconnecting from bluetooth, please try it yourself. It is the same behavior as if you have the volume set at 50 for example, turn the unit off, and then dial the volume knob up to 120. When you switch...

Hello, thank you for your feedback. But of course the volume levels can be memorized, as the analog setting is converted into digital and the unit sets the volume digitally. That is also what the unit does: Lets say the volume is at 20 before enabling bluetooth. After the connection is...

ok, found now the gain slider. You have to set gain yourself.

Ok, found the problem. When Volume adjusting mode is set to Volume Knob, it doesn't work. With Volume button it works. Should be fixable in a software update, as it is intelligent enough when the volume is set to 120 while bluetooth enabled, it will switch back to the old volume setting when...

Thank you for the very good explanation. That was the reason I was asking: To be bit perfect, you don't want to reduce the preamp. And normally, when you switch on an EQ, you lower the preamp to avoid clipping. You can hear that, as the volume decreases. But when you switch on the eq of the...

Hello, I have a problem with bluetooth audio in my car. The volume does not go up to 120 when connected, so I have to manually set it to 120. On my M11Pro it was automatically set to 120 when connecting to bluetooth, and went down to the last setting again after disconnecting. Have I missed a...

Does someone know how the built in EQ works? AFAIK when enabling an EQ the volume needs to be reduced to have enough headroom, so it won't clip. But when I enable the EQ on the M15S the volume stays the same?

How does the M15S compare to an approx. similar priced A&K, like the SR35?

Ok, I just installed AIDA64 and saw that the processor is running hot...restarted the unit and now the temp is 4°C lower. So all seems to be normal now.

Thank you for the info, that is what I thought. The problem is, that the battery inside is approx. 8° hotter than the outside case.

I just checked your Flir pictures. Does your unit still measure around 40°C on the display after the firmware update? I have approx. 38°C on the display at 24°C ambient, and the battery runs at approx. 46°C.

Thanks for the info, I am on 1.05. On the other demo unit I had, V1.05 was already installed, and it was reseted when I received it. Same behavior. But I will try a reset maybe it helps.

I received my M15S now I am very happy with the sound and handling. But the temperature is really high of the unit. With charging disabled, continued play for hours (Fiio FDX IEM, Volume 50, High Gain), in the leather case, in the stand with fan off the battery temperature rises to around 23°C...