It thanks to their sensitivity of 104 dB and impedance of 55 Ohm. I will do the same with HD600, they need more power/volume to get as loud.
FiiO K9 Pro Hi-Fi DeskDop DAC&Bluetooth&Amplifier，XLR/RCA/4.4/Optical/Coaxial interface
- Thread starter FiiO Willson
- Start date
Can you also help to test out below issue which is reproduceable in my unit (if you have few mins to spare):
The way to reproduce the issue is as below.
1. Move the first switch all the way down apply bit more pressure to move the switch down.
2. Move the gain to high gain as it only reproduce in high gain. When switching to other gain its working fine.
3. Play some music, wait for few sec 10 or 20 sec the audio output switches from HP to DAC mode (the volume slider was not changing the volume on my xb30 speaker.
Attached a video link where the sound was first played in sundara and then in fee sec it auto changes to DAC mode with some internal clicks in K9 pro.
https://drive.google.com/file/d/1Ok47VIivoarY99wN5PyZH10OZZpU11RT/view?usp=drivesdk
Dear friend,
Please try to clear the K9Pro and reconnect again first: you can long press [INPUT] for 5 seconds to force the K9 Pro to pair with the new device. And please check whether the volume of the mobile phone have been set to higher level?
And does the output mode of the K9Pro have been switched correctly:
DAC means that the output is switched to the rear panel, and the volume knob cannot adjust the volume. At this time, there is no sound from the earphone port on the front panel.
PRE means that the output is switched to the rear panel, and the volume knob can adjust the volume. At this time, there is no sound from the headphone port on the front panel.
HP means that the output is switched to the front panel, and the volume knob can adjust the volume. At this time, there is no sound from the rear panel interface. Please turn to the [HP] file to connect the earphones.
Best regards
ATimoff
Head-Fier
Audiophile friends. Who enthusiastically describe their perception of the K9 Pro sound. Keep in mind that you are not characterizing the device, but the sound features colored by the included digital filter (6 types?). Specify which filter was enabled. It is even better to compare the sound of different filters. Which filter do you like best and why? If you don't feel the difference, then there is something wrong in the existing sound path... Filters affect not only the scene, localization, dynamics, color of sound, but also fatigue when listening. I am also glad that the previously noticed heating of the device is insignificant. Fiio Filters: https://www.head-fi.org/threads/fii...-4-4-optical-coaxial-interface.952664/page-50
I think I read that the low pass filters only apply to the K9 Bluetooth output but now I can't find the reference - please can someone confirm that or correct it?
Immortal
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I'll try to clarify my workflow here. The goal is to reproduce music through my speakers (RCA output on the back) using BT:
- Turn on the K9 pro
- It starts in USB mode as INPUT, and with DAC as output. In this mode I can clearly listen a media reproduced from my PC to my speakers, so this mode works great.
- I press input and move to BT mode (short press or 5 seconds press, nothing different in the following behavior).
- A "USB device not recognized" popup appears on my computer. In the meanwhile the k9 ring flashes blue/red lights (so it is trying to pair with a device).
- I search for a new BT device on my smartphone (tried with 2 android smartphones and one laptop, actually)
- "FiiO K9 Pro" is detected as an available device, and I can successfully pair & connect with it. At this moment the ring moves though all the colors.
- Because the k9 is connected as an active output device, I can try to play a track using spotify/vlc/the fiio app on my phone.
- When I press play, no sounds come out from the speakers (I'm still in DAC mode)
- After a second or two, the ring become purple & there is no connection between the device and the k9 & my pc stop showing the "USB device not recognized" popup
- If I try to reconnect the K9 to my phone, it says it is impossible to connect.
- long press on the INPUT button and try again from step 4
Firmware is 1.13 (the k9 arrived with this version already) and on my win10 pc I'm using your beta 5.22 drivers.
Hope it helps
Edit: added step 10 for clarity
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itsnein
100+ Head-Fier
Could you try to remove USB cable from fiio before p7?
looki look
New Head-Fier
I don't get sound with bt input too (HP mode). I have b15 beta firmware. I have no other cables connected in the moment, only the hp (and power cord). Same effect: I can connect from mobile phone and I can adjust the color-ring-brightness and the bt-mode, so connection works, but no sound output on hp. Tried 3 apps: fiio music app, vlc media player and foobar app with none I get sound output on k9 with Bluetooth input. (I don't switch settings its fixed on HP Mode, high gain. BT input) .. I just tried the 5 second input/re-pairing, but same problem. color ring is now green (ldac mode) but no sound
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FiiO Willson
Sponsor: FiiO
Hi, I want to say something, please check if it can help you，
1, first of all, computer can only be recognized when Input = USB; if you can not be recognized in this state can try to re-plug the USB cable
2, BT mode, the computer can not recognize the K9 Pro; but BT mode can save some settings, you can connect with the Phone in BT mode, set it up, and then turn the Input back to USB input, so you can hear the music from the computer normally.
3, The Power button, that is, you said the Play key, he has a pause function in addition to play, when you do not press, he can play by default, but you may press once to become Pause. If there is no sound, it should be pressed to pause, you can press again and he will play
Thank you for your support, I'm sorry for trouble you !
FiiO Willson
Sponsor: FiiO
If the LDAC color display is normal, the settings should be normal, you can enter the FiiO Control APP to see if the settings are correct?
Immortal
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Already tried, nothing changes except for the "USB device not recognized" popup obviously
good to know!
Hi,
1- It works exactly as you described and not a single problem with USB (from the rear) as an input for my pc
2- Again: hearing music from my computer is not the issue. It works perfectly! The issue is reproducing audio using BT as input.
When my phone connects to my k9, it cannot reproduce any music. Just 1 or 2 seconds after I press the "Play" button, the connection drops/fails.
3 - No, the player is not in "pause". It cannot maintain a (stable) connection after I press the "play" button (using FiiO player, Spotify, VLC, etc etc)
Maybe a video could help?
Connect something on line out some speaker or aux speaker or something, Fiio K9 Pro uses a digital switch which switches when the front switch change/slide with a click sound, so some they they act up and send the signal to dac mode even the switch is on HP mode.
Its happening for me on high gain only, so you can also test if that's the case.
FiiO Willson
Sponsor: FiiO
Is there no sound after switching from USB to BT, or is there no sound all the time after the phone and K9 Pro make sure they are connected?
Can you try turning up the volume of your phone? Then try turning up the volume on the K9 Pro?
You can send me the Video via private message, so that we can communicate better individually
Immortal
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Is there no sound after switching from USB to BT, or is there no sound all the time after the phone and K9 Pro make sure they are connected?
Can you try turning up the volume of your phone? Then try turning up the volume on the K9 Pro?
You can send me the Video via private message, so that we can communicate better individually
Ckeck your PM
Just an update on my Bluetooth experience with the K9 Pro, as some of you seem to be having problems. Bluetooth isn't something I will use often, but I've tried it with the output going to my hifi amp and speakers - with no problems - and today with headphones. Both times I used the Fiio Control app to select the Bluetooth codecs I want the K9 to support and set the BT output on the front panel. I was streaming Amazon Music HD from a Samsung phone and set the phone to send aptx initially (see below), which I knew the Fiio was set to receive.
Today, I thought there might be a problem when I first used the headphones: I heard a couple of clicks on starting up and a single popping sound a little way into the first track, though the music started immediately. I'm not a Bluetooth user, so I don't know how normal that is, but the K9 settled down after that, with no more unwanted noises. This was using apt-x. I switched to LDAC on the phone and had no problems at all. The sound was far better than I would have expected with Bluetooth. Amazon Music was showing up to 24 bit/48KHz at the output, depending on the quality of the track. It stayed at 48KHz even if the Amazon track was higher resolution.
I used both medium and high gain headphone settings and both worked as I would want. There was plenty of volume on the medium setting, though my Grado SR325s are not hard to drive. I tried the various filters and kept coming back to the third one (short delay, sharp roll-off from memory). The differences between the filters seem very subtle, but I thought this one gave the most rounded bass response. I'm still not sure if the filters are designed only to work on Bluetooth (as mentioned in my last post here) but someone may know the answer?
Today, I thought there might be a problem when I first used the headphones: I heard a couple of clicks on starting up and a single popping sound a little way into the first track, though the music started immediately. I'm not a Bluetooth user, so I don't know how normal that is, but the K9 settled down after that, with no more unwanted noises. This was using apt-x. I switched to LDAC on the phone and had no problems at all. The sound was far better than I would have expected with Bluetooth. Amazon Music was showing up to 24 bit/48KHz at the output, depending on the quality of the track. It stayed at 48KHz even if the Amazon track was higher resolution.
I used both medium and high gain headphone settings and both worked as I would want. There was plenty of volume on the medium setting, though my Grado SR325s are not hard to drive. I tried the various filters and kept coming back to the third one (short delay, sharp roll-off from memory). The differences between the filters seem very subtle, but I thought this one gave the most rounded bass response. I'm still not sure if the filters are designed only to work on Bluetooth (as mentioned in my last post here) but someone may know the answer?
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