I have one of these on order to use with headphones, but, if I am happy with the sound and ease of use, I will get another to replace an Audioengine BT receiver and miniDSP HD in my main system because I like the reliability of less cables/connectors and the ease of use of the app for control. Exciting times!
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Qudelix-5K Bluetooth DAC & Headphone Amp
- Thread starter amirm
- Start date
Each ES9218p channel has current limit at about 45mA, hence 50 * 0,045 * 2 = 4,5V p-p (~1,6V rms) →1,6^2 / 50 = 51,2mW Pretty darn close, right?
Balanced connection (also called bridge-tied load (BTL)) gives you twice more Voltage and Current, if done right. Hence 4x Power → 51,2 x 4 = 205
So, it doesn’t deliver 4Vrms!Each ES9218p channel has current limit at about 45mA, hence 50 * 0,045 * 2 = 4,5V p-p (~1,6V rms) →1,6^2 / 50 = 51,2mW Pretty darn close, right?
Balanced connection (also called bridge-tied load (BTL)) gives you twice more Voltage and Current, if done right. Hence 4x Power → 51,2 x 4 = 205
fgfgfg
Member
It does, for load over 64ohms
poimandres
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Picked up one of these from Amazon sold by Qudelix, it didn’t come in a plastic bag (as most unboxings show) and the one corner of the box was slightly dog eared but the seals were still in place.
Really enjoying this using Bluetooth to my iPhone. So many options, with Oratory’s settings my Elegia’s (balanced using meze’s copper cables) sound really good, although I have to turn the volume up louder than without having the Oratory settings. Is there an easy way to turn the settings off?
What filter is everyone using?
Really enjoying this using Bluetooth to my iPhone. So many options, with Oratory’s settings my Elegia’s (balanced using meze’s copper cables) sound really good, although I have to turn the volume up louder than without having the Oratory settings. Is there an easy way to turn the settings off?
What filter is everyone using?
poimandres
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Thank you. I would have to volume match however I think I prefer it with eq off. Too many options, enough to drive myself crazy.
Curious if I would notice any sq improvements plugged in vs Bluetooth.
Curious if I would notice any sq improvements plugged in vs Bluetooth.
Since fw v1.12.1 I’m facing problems when using the 5K via USB on my iPhone 12 Pro. When switching apps or skipping to next song, the current playing audio drops and results in pausing the audio. More people experiencing this issue since updating the fw? I’ve disabled Bluetooth entirely, to make sure it is not happening due to Bluetooth interference (like auto switching to bt input).
It seems that there is some issue while using Qudelix via USB - https://www.qudelix.com/pages/forum...to-any-source-via-usb-12224986?pid=1331467312
In each case, let Qudelix know, they are usually very responsive in bug fixes.
It will drive a Sennheiser 6XX adequately (especially on balanced output), but for high volume and dynamics you may want a more powerful amplifier.
Received my Qudelix 5k two days ago. It’s driving a Sennheiser 58X. Using Oratory preset for now (three available for 58X). Really enjoying this. Great sound and value, especially compared to my Dragonfly Red. I hope that the leading desktop manufacturers start including PEQ in their DACs. This little amp shows the way.
Quick observation : these are the AutoEQ profiles (this project : https://github.com/jaakkopasanen/AutoEq) automatically generated from Oratory's measurements, not Oratory's own profile, which you'll find in that list and will have to enter manually : https://www.reddit.com/r/oratory1990/wiki/index/list_of_presets
That should provide another starting point for fiddling with the presets
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schomin
Member
Is anyone aware of a place that has these in stock currently? Looks like both Amazon and the Qudelix website are out of stock.
Phoney
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So I got this some days ago and I really like the app! There is however a lot of options, and I'm not sure if I sent everything at the best option for my use. I am using this primarily for my Denon AH-D7200 (25 ohm, 105 db sensitivity). I put performance and output power at high, and I also set the Oratory eq for Denon on both my standard setup and this one. I firstly noticed that the Denon bass didn't feel as present on the Qudelix. I eq'ed the high frequencies down which indirectly boosts bass a bit and also gives more headroom from higher preamp setting and it helped a bit. But I tried to switch to my standard setup with the same eq settings and the bass felt better, also the sound felt slightly cleaner in general. I expected it to be pretty much the same. I just don't know whether it's imaginatory, if I'm not using the optimal settings, or if the difference in equipment actually matters in this case.
Standard setup: Topping D30Pro and Schiit Jotunheim 2 (USB, balanced XLR cables, and XLR headphone cable at low gain setting)
Qudelix 5K: 6.3mm headphone cable with 3.5mm adapter from Grado. Bluetooth, Sony codec ldac with android phone. I have ordered a 2.5mm cable but I'm not sure if that will make a significant difference..
Anyone know if theres anything here that could be the reason outside of just imagination? I do think that I already have more than enough headroom.
Standard setup: Topping D30Pro and Schiit Jotunheim 2 (USB, balanced XLR cables, and XLR headphone cable at low gain setting)
Qudelix 5K: 6.3mm headphone cable with 3.5mm adapter from Grado. Bluetooth, Sony codec ldac with android phone. I have ordered a 2.5mm cable but I'm not sure if that will make a significant difference..
Anyone know if theres anything here that could be the reason outside of just imagination? I do think that I already have more than enough headroom.
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Of course it is out of stock, because I was starting to seriously think of picking one up. Clearly my fault.
IoYajGahju
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Hi!
A quick question (maybe to @amirm if he has time) - does having it permanently plugged in (used effectively as a desktop amp) affect performance?
As in, does having battery charged during playback introduce additional noise or some other weird problems?
Had some audible weirdness with that from old battery-capable Fiio (probably charging circuit being shenanigans, especially since the battery was half-dead) so would very very appreciate if someone could kindly check for that on this unit
A quick question (maybe to @amirm if he has time) - does having it permanently plugged in (used effectively as a desktop amp) affect performance?
As in, does having battery charged during playback introduce additional noise or some other weird problems?
Had some audible weirdness with that from old battery-capable Fiio (probably charging circuit being shenanigans, especially since the battery was half-dead) so would very very appreciate if someone could kindly check for that on this unit
I haven't noticed any detrimental effect of that kind. I advise however to limit charging the battery to 80% (in the app's settings) if it stays connected to power at all time to preserve battery life.
From the official manual, device was designed to be used connected all the time and in theory should keep working even with faulty battery.
Source: https://drive.google.com/file/d/1Z7sMD4v_8P1zYGW7-hrHvHVJRdm-3bQA/view
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