I have the MBP 14 M1. Recently bought HD600 and Topping DX3 Pro+. So basically the headphones get as loud as the DX3 Pro+ on high gain. So if my DX3 Pro+ is on low gain, then the MBP is louder.

Yeah yeah, loudness isn't the only thing with amps especially with HD600 - but I've only been with these for a day and I don't really have golden ears to tell. Just wanted to know if this is expected with the MBP because of the thing they mention about adjusting power for high impedance headphones.