I thought of a few off the top of my head. This better not show up in a future video of yours without due credit.
1) Assume you hear the same way someone else does, and vice-versa: Audio is massively subjective. What’s perfect to someone else may not be perfect to you, and what’s trash to them might appeal to you. That’s not even mentioning the different music you may listen to, different sources you may have, etc.
2) Only read one or two reviews before making a purchase: Going off no. 1, it’s best to gather as many data points as you can before buying anything, so bias is as minimized as possible.
3) Think a brand’s flagship is the one you “have to” buy: This is a mistake I’ve even seen veterans make. Sometimes, the flagship may have better technical performance, but also a tone you may not agree with. So, never discount a brand’s cheaper offerings. They might happen to be the best ones for you.
4) Think reference sound is the ultimate sound: It’s not. Just like warm, bright, punchy or relaxed, it’s just one of many sounds. You might love it, you might hate it. Don’t let marketing fool you. A lot of the products that brands call
reference would be laughed out of the studio by actual engineers anyway.
5) Base purchases off a specs sheet: More drivers does not mean
better.
More crossovers does not mean
better. They just give the tuner more options to craft the IEM’s sound with. Whether or not they did a good job crafting is another matter entirely. Not all drivers and crossovers are made the same either. A single-driver IEM with 5 years of R&D can leave a slapped-together, 10-driver hybrid in the dust. So, don’t be shocked if the former turns out pricier and better.
6) Listen way too loud: Not only can this give you a bad impression of an IEM, but it’s bad for your long-term hearing as well. Train yourself to listen quieter, and I guarantee you’ll get more out of IEMs; even the ones you already have.
7) Settle for a lesser product, rather than save a bit more for the one you actually want: I’ve seen people do this countless times, and it only leads to disappointment. After a while, they end up selling off the IEM they settled for at a loss, then saving up again to get what they originally wanted anyway. Save yourself the hassle, just wait a bit longer for the next paycheck or two, and spend it on something you truly desire.
8) Overestimate the differences cables, burn-in, etc. can make: I’ve seen salespeople snake beginners into buying a product they don’t really want by telling them 100 hours of burn-in or swapping out the cable will fix all its problems. In reality, the changes those bring are completely situational, and they won’t turn an IEM into something it’s not. This is especially true if you’re a beginner and you can barely hear those differences anyway.
The last one’s the most situational, but I feel it’s the most crucial one too.
9) Buying without trying: I know, in 70-80% of the world, this is simply down to unavailability. Not everyone lives in SG, HK or JPN, where auditioning every IEM in the world is a car or subway ride away. But, rather than gambling, buying blind and potentially incurring massive losses, I’d always recommend spending the money to go to your nearest CanJam or audio meet, if possible. It’s money you’re likely to lose if you’re blind buying anyway, and you’re at least guaranteed the chance to meet fellow Head-Fi’ers, explore a new city and meet the people behind the products you love. The dozens of products you get to try are almost a bonus, and just those 2 days should be enough to give you a base vocabulary of IEMs that you can then interpret reviews or comparisons better with. For example, maybe you heard the Fei Wan at a CanJam and loved it, but wanted less treble. The next time a respected poster calls an IEM a “warmer Fei Wan,” you’ll know to look out for that IEM.