I was saying that some sort of turn on noise for IDA-6 is expected. But you are saying that your IDA-6 is not normal, so without getting your IDA-6 back to the factory for analysis, we can't be sure. Please create a help desk ticket. But again, it is turn on noise, it won't affect your normal listening. Do you think it is worth the expense of investigating this issue? The round trip cost of shipping IDA-6 is going to be expensive.
If it is a problem that affects the performance or functionality of the product, we will certainly fix it. If you want to trade it in for IDA-8, email our sales and I can make you and offer. I simply can't just authorise the expense of replacing your IDA-6 because of a turn on noise.