Qudelix 5K Reference DAC AMP
About this deal
In the manual, the four button positions are called: red upper, red lower, blue upper, and blue lower, respectively. Initially, it was a bit of a problem to figure out which is which, as the indicator LEDs light up only when you press something. Latency: So apparently the chipset Qudelix is using doesn't support aptX Low Latency, and the USB DAC isn't working currently with the Nintendo Switch, so Switch owners, this isn't for you. aptX Adaptive's latency is fine on videos, maybe not ideal for competitive games, so I'm a bit upset that this is replacing aptX Low Latency, but it's definitely better than most other Bluetooth codecs.
Re: sound quality - here's where I have to disappoint you: I need to admit I don't have much (well, almost any) experience when it comes to audio devices, especially AMPs or DACs. Simple - I get 1.5-2h more than the BTR5 on Performance + LDAC. that's around 7 hours vs 5.5 (BTR5). This is a straight forward PLUS.
For Bluetooth connectivity, the Qudelix 5K is using the latest Qualcomm QCC5124 chip which supports all the latest codec technologies, including aptX Adaptive, LDAC, AAC, aptX HD, aptX, and SBC.
I waited patiently for a few weeks since my CIEMs were in the works. Time has passed, but nothing changed. For high sensitivity IEM, the 1V RMS mode offers the best noise performance and power efficiency. There's no reason to keep the low gear on the highway.
If you like to equalize your earphones and have full control of the DAC functionality then the Qudelix 5K is the one to have.