Truthear x Crinacle Zero:RED bass difference

[timer1992]

Hello everyone, I just received this new pair of IEM today and thought I'd do a quick measurement. Here is my setup:

• GRAS 45CA with RA0045 and KB501X pinna
• APX525

However, the test results revealed some differences in the low-frequency range compared to measurements conducted by others.
So, I'd like to inquire about your opinions. Is there a chance that I might have overlooked something in my measurements, or could there be any other possibilities?
Thank you.

 

[markanini]

Is your amps output impedance is in the two digits?