Great review as always. How does this compare to the P1, Trinity Atlas, and Fidue A73/83? Cheers.

The LZ A4 is on par in terms of sound with the earphones you named, but the beauty is in the tuning filters. What sets the A4 apart from the mentioned earphones is the ability to really dial it in for your preference and application. The only earphone that you listed that has tuning filters is the Trinity Atlas. Still, even when comparing the two you can only manipulate the upper frequencies with the Atlas. With the A4 you can alter both the lower and upper frequencies. In my opinion that puts the A4 above the others in terms of sound. It's all around more versatile and almost all filter combinations sound great in their own way.