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Ken, can you comment on the hiss? Maybe Vinnie could chime in too?.
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Hi Veloaudio,
With very high sensitivity IEMs, you definitely want to use the low gain setting (gain switch in the downward position). There are some IEMs that are just so sensitive (e.g. 124dB) that they will pick up on the noise floor of the amplifier (or the noise from the source). There are also some IEMs that are not super sensitive and quiet at low gain.
And then there are headphones like the K702s, HD650, Denon D5000, Grados, Ultrasones, etc. that are dead quiet with the Amphora (even on the high gain setting).
Hi HeadphoneAddict,
Interesting point about the Shure volume attenuator. This is probably lowering the sensitivity of your ES3Xs and that is why it is removing the background noise...
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only hear the hiss between songs or when paused and not above the music, but I can see how it can get to you knowing it is there with very sensitive IEM.
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It sounds like it is low-level noise (again, such sensitive IEMs are picking up on the noise floor) and not an issue when music is playing...
Please keep us posted.
Best regards,
Vinnie