Learn how to read frequency response graphs and understand the research behind the harman target. I used to watch and read reviews but I found out they never accurately described a headphones/IEMs sound after buying and listening to them. You don’t have to like the harman target or buy headphones/IEMs that are tuned to it, but understanding the harman research will make make buying headphones/IEMS easier and it will SAVE YOU A LOT OF MONEY.

Don’t waste your money on expensive DAC/AMPs. Most DAC/AMPs are measure flat nowadays so they won’t change the sound of the headphone. They’ll make your headphones louder but that’s about it.