But how does FiiO KA17 achieve 4.5 Vrms = 12.7 VP-P (4.4mm, desktop mode, high gain) then?

You are talking about Vrms while zilax002 is asking for VP-P VP-P = 2 x sqrt(2) x Vrms

Voltage swing of FiiO KA17 is 12.7 VP-P 4.5 Vrms = 12.7 VP-P

@FiiO Could you please explain why there are 4x SGM 8261-5 amplifiers, when fiio.com states that "inside the KA17 are THX AAA 78+ headphone amplifiers"?

I'm pretty sure neither the filters itself, nor their numbering/order, did change between firmware 0.84 and firmware 0.99, only the names were completely wrong in 0.84 e.g. filter 4 always was "linear fast low-ripple", even though firmware 0.84 said "minimum slow".

To clarify: I'm pretty sure neither the filters itself, nor their numbering/order, did change between firmware 0.84 and firmware 0.99, only the names were completely wrong in 0.84 e.g. filter 4 always was "linear fast low-ripple", even though firmware 0.84 said "minimum slow". Filter names...

Ok, so no in-line controls. And in-line microphone?

Any official/quotable update on this? :)

Another short cable from ddHiFi: • ddHiFi BC130B Air Nyx (Short Version) – 55 cm – MMCX – 4.4 mm BAL

Wow, what a great explanation!

@Shanling Any updates regarding the bad noise floor on 4.4mm output? Easy way to reproduce it: Connect IEM to 4.4mm output. Make sure that any audio is actually playing. Else automute will hide the noise floor. While audio is playing, reduce volume of UA4 to 1. Bad noise floor is clearly...

@ammarali047 Maybe you can get Creative SXFI Amp (discontinued?) or Sound Blaster X1 (https://us.creative.com/p/sound-blaster/sound-blaster-x1) for under 40 USD?

I asked @MOONDROP here, but no answer yet. But I'm pretty sure that Moondrop Dawn Pro does not support microphone passthrough, because CS43131 does not include an ADC. Hm, there are reports that some bluetooth-dongles will do microphone passthrough only in bluetooth-mode. But I will try to...

@MOONDROP Do any of Click 3.5, Dawn 3.5, Dawn Pro, Moonriver2, Moonriver2:Ti support in-line microphone (4-pole 3.5mm CTIA TRRS)?

@Andykong Do Cayin RU6 and/or Cayin RU7 support in-line microphone (4-pole 3.5mm CTIA TRRS)?

@iFi audio Do iFi GO link and/or iFi GO bar support in-line microphone (4-pole 3.5mm CTIA TRRS)?

1) Etymotic ER4SR. iBasso DC04Pro – 3.5mm – noise floor good iBasso DC04Pro – 4.4mm – noise floor good Shanling UA4 – 3.5 mm – noise floor good Shanling UA4 – 4.4mm – noise floor bad :frowning2: Same IEM, same cable, same everything. 2) Then your engineers are wrong. Because the official...

First of all, thank you very much for your reply and for trying to solve the issues with UA4. 1) When very quiet music is playing (4.4mm output), there is bad noise floor / background noise / signal noise / static. I checked 3.5mm output, and noise floor for 3.5mm is fine. Whereas noise floor...

added various HiBy

Thank you very much.

Thank you very much.

Thank you very much.

Just to make sure that I understand correctly: FC1, FC3: in-line microphone yes, in-line control no. FC4, FC6, FD1, FD3: in-line microphone no, in-line control yes.

iBasso DC06 Pro is available in stock at hifi-passion.de (free shipping within EU) since two weeks ago. https://hifi-passion.de/en/brands/ibasso/1728/ibasso-dc06-pro

This video shows volume control behaviour with original firmware. With firmware update v1.0.2 it is less annoying, but still annoying.