Question Question Traktor Audio 2 MK1 Soundcard single popping sound when turning on/off laptop and when connecting/disconnecting USB. Is it a normal behavior?

[prsnr]

Hello,

I'm using a Traktor Audio 2 MK1 Soundcard and I'm using Sennheiser HD 25-1 II.

Every time when I turn on/off my Lenovo W540 laptop I hear a single pretty loud popping sound.
The same also happens when I connect/disconnect the soundcard.
Is that a normal behavior? Is it damaging the speakers/headphones?
When the headphones are connected directly to the laptop, the popping sound does not occur.

I'm using the laptop without battery. It has 4 USBs - 2x2.0 & 2x3.0. I'm using only the 2x2.0 USBs - 1 for my mouse and the other for the soundcard. Windows 10 x64.

Thanks in advance for your time.