arrow34
New Head-Fier
Hiss has to do with a high sensitivity in IEMs in general.
I asked in the sound science forum and this was their general consensus: https://www.head-fi.org/threads/is-...y-more-influential-in-hiss-for-an-iem.915705/
I think their opinion is correct, as the hiss I have are generally in the IEMs with highest sensitivity. Maybe a very low impedance might also affect to some extent, but it is mostly sensitivity that determines the hiss.
Just for comparisons, sensitivity of the IEMs u asked about are:
KZ ZSA: 101 dB
TRN V90: 110 dB
TRN V80L 108 dB
(I have not converted the sensitivity using the calculator in the above link yet, but these are ballpark figures from the specs sheet of the above IEMs).
I have a feeling the TRN V90 might hiss a bit too based on the above numbers, maybe someone who has the V90 with BT20/20s can confirm.
I do use my BT20 with hissing IEMs and once music starts playing, I don't really notice the hiss anymore, but I did read that the V80 is quite bad with the hiss on the BT20 for some reason.
If u are connecting a hissing IEM to the BT20 or BT20s I don't think much can be done to fix the hissing if it is highly sensitive. But if u are plugging these sensitive hissing IEMs to desktop or smartphone, the hiss can be attenuated by using an amp, an inline volume controller or an impedance mismatch device.
Thanks for the reply. I am just bummed that the v80 and potentially v90 wont work with the bt20s, I have been using them with the kz zsa all day and really like them, they have a great sound and really long battery life.
The v80 doesnt hiss much at all on the bt10 or wired (well not much)m it is REALLY bad with the bt20s. IT is like a white noise generator and you cnat really hear anything else.