FIIO FH9 REVIEW : VERY CAPABLE WITH MINOR HICCUPS
FH9 has a nominal impedance of just 18 ohm and riving it out of any source is not difficult. Just like any other good quality IEM, FH9 enjoys some power. When driven out of mobile phones, it sounds reasonable, but it is not as clean and separated as a dedicated dongle or USB device.
Given that the FH9 is a bit in the V, has plenty of bass and treble energy, pairing it with a source which is analytical or sharp may result into a bit less desired output. I still have paired the FH9 with the Shanling UA5 and Fiio K3, yes, it is not the most musical or relaxed but with slow roll off filters and foam tips on the FH9 and the output is a lot more neutral and less offensive.
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Author: SUMAN SOURAV MEHER; From: theheadphonelist.com
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