Showing 1 of 227 conversations about:
thefitz
351
Jun 8, 2017
bookmark_border
Be aware that these won't sound great through a regular smartphone headphone jack.
Reason: Impedance of multi-driver IEMs isn't linear, and typically 3+ driver units have values that vary wildly. Through a smartphone, the highs are attenuated considerably. This is not an issue with portable DAPs that have <=0.5 ohms output impedance.
Jun 8, 2017
HenKi
42
Jun 8, 2017
bookmark_border
Can you recommend one under 75$?
Jun 8, 2017
thefitz
351
Jun 8, 2017
bookmark_border
Look for dynamic drivers - they don't have this reactive nature of BA IEMs. Even single BAs.
Jun 8, 2017
MetaMorph
66
Jun 11, 2017
bookmark_border
That's a little misleading given that many smartphones have a relatively low output impedance. iPhone 4: ~1 ohm, iPhone 5 ~3 ohm, iPhone 6/6s and Galaxy s7 ~5 ohm. That's not to say that using another source wouldn't be better, but based on the numbers here https://rinchoi.blogspot.com.au/2014/03/nuforce-primo-8-firstborn.html, you would probably only see around a 3db reduction even from 5 ohm output impedance.
Jun 11, 2017
thefitz
351
Jun 11, 2017
bookmark_border
According to this graph: http://www.innerfidelity.com/images/NuForcePrimo8.pdf
The impedance goes down to around 6 ohms in the treble, which is already muted. The standard I keep hearing about is to have your output impedance be 1/8 of the total impedance. Even 1 ohm is far too much.
Jun 11, 2017
MetaMorph
66
Jun 12, 2017
bookmark_border
Well I guess whether or not a <3db reduction in treble is "far too much" depends on your preference. I personally am happy using them straight from my G5's headphone out, as well as from my dragonfly.
Jun 12, 2017
View Full Discussion