Hi @IMZvonko , here are some threads that might be of interest to you, depending on your question. Just hit reply to post in one of those threads.
General Purchase Advice
IEMs General Discussion
Or if you have a question about a specific model, then you can look for a thread for that model. The easiest way to do that is using the search function. For instance, if I had a question about the 789 amp, then after looking at the search results, I’d see that there’s a thread called “Massdrop x THX AAA 789 Amplifier - Official Thread” where I can post.