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Qudelix-5K Bluetooth DAC & Headphone Amp

Yes, you can save/name multiple different peq settings and easily changed using Qudelix 5k phone app.
 
As others have mentioned, for Mac/iphone/ipad use then the Qudelix 5K is the only sensible option as the app works perfectly.

Fiio makes neat and nicely designed Bluetooth dac/amp dongles but their app and control software is woefully utterly shit, and does not play nicely with iOS devices, their software updates are also shit and they bring to market new products all the time without paying any heed to older products.

They’re a company that fits the marketing term “throw all the shit against the wall and see what sticks”.
Your text is the last drop in the glass. I am ordering the Qudelix.

Thank you for chipping in
 
After buying a defective JCally, I decided to get a QUdelix. power with equalizers, I love it
 

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Yeah, it's crazy how small the thing is. I also learned to RTFM because there are a lot of settings. If you are planning on using it with USB-C, I recommend changing the setting under INPUT > Bluetooth Mode for USB DAC to Disconnect A2DP. Otherwise, I found the phone would be using bluetooth even when connected via USB-C, which is obviously of no benefit. If you ever want to use bluetooth, just flip the setting back to Normal.
 
Yeah, it's crazy how small the thing is. I also learned to RTFM because there are a lot of settings. If you are planning on using it with USB-C, I recommend changing the setting under INPUT > Bluetooth Mode for USB DAC to Disconnect A2DP. Otherwise, I found the phone would be using bluetooth even when connected via USB-C, which is obviously of no benefit. If you ever want to use bluetooth, just flip the setting back to Normal.
I just set select "USB DAC" in the INPUT / PRIORITY option. Has worked for me...
 
I just set select "USB DAC" in the INPUT / PRIORITY option. Has worked for me...
I've always had mine set to that (I think it's the default, which would make sense), but BT would still take over for some reason. I rarely use it so I find it easier to turn it off.

I can't think of any reason you'd want to use BT when you are plugged into the same device with USB, but maybe there's some use case for it.
 
I can't think of any reason you'd want to use BT when you are plugged into the same device with USB, but maybe there's some use case for it.
There is a pretty significant use case: iPhones & iPads. The Qudelix app only works through BT on iOS (an Apple restriction). So, if you want to play music through USB for best quality, and fiddle with the 5K settings at the same time (PEQ…), you need both USB and BT connections…
 
There is a pretty significant use case: iPhones & iPads. The Qudelix app only works through BT on iOS (an Apple restriction). So, if you want to play music through USB for best quality, and fiddle with the 5K settings at the same time (PEQ…), you need both USB and BT connections…

Thank you for this, I had one delivered today but I'm not home from work yet to play with it. I am using an iphone so it's one less thing to figure out when I get home.
 
There is a pretty significant use case: iPhones & iPads. The Qudelix app only works through BT on iOS (an Apple restriction). So, if you want to play music through USB for best quality, and fiddle with the 5K settings at the same time (PEQ…), you need both USB and BT connections…
This setting won't affect that. It still connects to your iPhone over BT.
Thank you for this, I had one delivered today but I'm not home from work yet to play with it. I am using an iphone so it's one less thing to figure out when I get home.
I still suggest changing that setting if you have any issues, because for me, just setting USB priority didn't solve it. The Q5K will still connect over BT even if you disable BT audio.
 
This setting won't affect that. It still connects to your iPhone over BT.

I still suggest changing that setting if you have any issues, because for me, just setting USB priority didn't solve it. The Q5K will still connect over BT even if you disable BT audio.
When you say “connect”, do you mean the Qudelix app, or the audio from whatever device/player app you’re using?

As we speak, I have a Q5K connected through BT to my iPhone, but it’s playing from my PC through USB. That’s what setting PRIORITY to “USB DAC” does: telling the 5K to grab audio from USB (PC), not from my iPhone (BT). But I can still control the 5K from my iPhone (BT), or from my PC (Cr extension > USB), my choice.

I guess I’m not sure to understand why you need to disable A2DP… If I don’t want the BT connection, I just disconnect it in the BT devices list on my phone, it still plays through USB.
 
When you say “connect”, do you mean the Qudelix app, or the audio from whatever device/player app you’re using?
Connect to the app. I never want BT audio when I have the device plugged into USB.

As we speak, I have a Q5K connected through BT to my iPhone, but it’s playing from my PC through USB. That’s what setting PRIORITY to “USB DAC” does: telling the 5K to grab audio from USB (PC), not from my iPhone (BT). But I can still control the 5K from my iPhone (BT), or from my PC (Cr extension > USB), my choice.

I guess I’m not sure to understand why you need to disable A2DP… If I don’t want the BT connection, I just disconnect it in the BT devices list on my phone, it still plays through USB.
My iPhone will still default to playing over BT when plugged in even though I have priority set to USB. I’m not sure why it does. Disabling A2DP lets me stay connected to the app but it will never try to use BT audio unless I specifically enable A2DP, which fits my use case.
 
This thing is pretty sweet! My use case is pairing it with a Fosi BT20a Pro into Klipsch RP600m speakers in my bedroom. I was able to get an eq suggestion for the speakers from Spinorama and apply it, what a difference. I'm just learning about using peq and measuring rooms. The fact that I can lay an additional "user eq" over top of the "speaker eq" once I learn to measure the room seems icing on the cake. I have another system I want to measure but I'm hoping learning on my more simple 2 channel bedroom set up will make it easier or at least less frustrating.

Being able to keep my alarm clock/media player/... (phone) next to the bed at night (I sleep to music) using Bluetooth and getting the eq for the speaker is just what I wanted. I like the USB input and portability but what I really like for my use is Bluetooth and internal battery. I left the USB priority set and switching back and forth to BT isn't any more difficult than the dance I have to do with the BT20a as it defaults on start up to Bluetooth. I have not noticed it sending music via BT while plugged in with USB but I am looking for it so thank you @ceedee for making me aware that it can happen and a way to correct it if it does.

I also tried the 5K with old school Apple ear pods, some cheapo Sennheiser open backs I have, Zero, and Zero 2 iems. The list of headphone eqs you can pick from is amazing, it was really fun to play with that. The app is really nice and the manual does a pretty good job of getting into the details including the input gain matching part (note 7 IIRC). I still struggle with enjoying things in or over my ear hole but since joining this site and seeing all the cheap IEMs available I've been experimenting with headphones again at least for yardwork.
 
Why is that when using Bluetooth while two devices(a Mac and an iPhone) are connected at the same time, content on one or the other will randomly unpause without any prompt from me to do so?

I assume this is a bug. I reached out to Qudelix Customer Support 2 days ago, still waiting for a response.
 
I have never connected the 5K to two devices, but that sounds like a bug.
 
This Head-Fi reply seems to be a pretty plausible explanation of what's going on: https://www.head-fi.org/threads/the-qudelix-5k-thread.914628/post-18735144
Not sure if it's really a bug though...
Yeah, I asked the question there as well. And they responded to it.

It seems plausible, the idea of the notification sounds triggering a "Malfunction" could make sense. Since I have come back after 20 minutes only to find that my music is unpaused and has gone through multiple tracks, or I am halfway through the most recently opened video.
 
Hey everyone. Need your light of wisdom and hive intelligence
So i bought the Qudelix 5K and love it. However that made me thinking. I have some analog devices such as a Digitakt 2 and i started wondering
what i can get to have the Qudelix flexibility but on a Line Out Headphone output. Is there a similar DAC you can recommend that has a Line In that can then be Customized regarding Frequency Response correction for its Output?
 
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