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Amp "pop" on startup. Bad for IEMs?

post #1 of 5
Thread Starter 

My iBasso D-Zero has an annoying pop when I fist kick it on. I assume larger headphones can handle this, but what about sensitive BA IEMs?

post #2 of 5
Quote:
Originally Posted by RingingEars View Post

My iBasso D-Zero has an annoying pop when I fist kick it on. I assume larger headphones can handle this, but what about sensitive BA IEMs?

i would strongly recommend unplugging the headphones during power-up/power-down if the pop is loud enough to be of concern. i'm sure this amp is a different story altogether, but as you can see, it's definitely stressing the driver of these K702's. DC current is very bad for headphones, as it causes the driver to move in one direction continuously, sometimes well beyond it's rated xmax.

 

post #3 of 5
Does the volume setting effect the pop? I have an Audio-gd NFB-5.2 which pops, but is fine if I turn the volume down before power off (and therefore power on).
post #4 of 5

Well, pre-relay Asgard is an extreme example to bring up, maybe not that relevant.

 

If you hear a pop and it's not borderline painfully loud, that means it's pretty much in the range of music you might be playing, right?  The amp is delivering power to the IEMs—whether or not a pop comes from music or from a turn-on transient, the IEM will move and make sound.  It shouldn't be more damaging than if your music had a pop or other sound in it at that level.  The exception is if the transient contains significant low-frequency content so low that it's not really audible (see the Asgard example above).  Then it could be damaging, but you may not hear anything.  Anyway, a typical pop from most amps is mostly higher-frequency, and you hear what you get.

 

If you trust them, you can probably just ask iBasso about it.  Ideally you could just measure the transient.

post #5 of 5
Thread Starter 
Quote:
Originally Posted by Loquah View Post

Does the volume setting effect the pop? I have an Audio-gd NFB-5.2 which pops, but is fine if I turn the volume down before power off (and therefore power on).


No. Volume doesn't seem to affect it. I think it's just a characteristic of the amp. I have two and they both do it.

I did a test like the asgard video and it doesn't do anything to a dynamic driver. I was just a little concerned about the BA drivers in my CIEMs.

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