Yes it was for a portability post. Here, it sounds the same, but YMMV - it depends upon the rest of your system. Battery banks represents the best possible power supply, very much better than linear as no leakage currents at all, and no RF noise.

You would send it to the great FPGA pile in the sky with 6v... It must be USB voltage compliant, that is 5v +/- 0.25v.

...amp. Or they will be like Hugo 2 but with on board volume controls - equivalent to an integrated amp. So the DX amps are just DAC's, exactly the same as existing pulse array DAC's - but with very high power OP stages, and a very clever power supply arrangement (don't ask!). I hope that...

Sure - that was one of the motivations for USB power, as battery supplies are inexpensive. Qutest consumes only 2.5W, so a 100W/H would last for 40 hours. If you can hear no change in connecting a battery, then that would prove that a "better" PSU to the one shipped is not possible. Battery...

...then you will not void the warranty - I just checked with Matt from Chord about this. I would add that it is designed to be power supply immune - as Hugo 2 is - so i don't expect any improvements from the PSU. But with USB it is easy to connect a portable battery powered USB charger to it -...

Flashing lights indicates failure of authorisation - the device is authorised at power-up by checking the FPGA unique DNA with a unique programmed 512 bit encryption key. I suspect what has happened is that power has been interrupted, and its either corrupted the FPGA, or the boot sequence was...

One benefit of super-caps is that it lowers the PSU impedance, and hence reduces the distortion crosstalk feed from the PSU. But this problem is eliminated with Hugo 2 and Qutest's PSU arrangement of regulating out from a boost voltage - so now the gain section is fed with clean power...

Qutest when on but not processing is only 2W of power. Electronics are more reliable if on for 24/7 too, if you run the semiconductors at low temperature - which of course is the case for Qutest. So it was intended to leave it on permanently. Yes I am reading this! Power dissipation is a major...

The accepted wisdom is that linear PSU's are the best, and that switchers are the worst, and I too bought into that prejudice some 5 years ago. But with the Hugo 1 project, my first portable DAC, you absolutely have to use switcher regulators from an efficiency POV. And here is what is strange...

Thank-you. Power is only 2W, so no need to worry.

It needs to be 5v +/-0.25v - the USB standard. It will be fine with a USB power bank, as to get the higher voltage for fast charge requires a comms response from the slave (Qutest) which it won't supply. So you would be safe. If you did put in more than 5v, you would blow the protection input...

The last time I talked about linear PSU's I got into trouble (2 Qute) as I compared the supplied PSU to a car battery and could hear no difference. But some claimed they could hear a difference - unfortunately I can only post about what I hear. That said, although through my listening and...

The one I use is Poweradd Pilot Pro2. Now this has internal regulators - so it is noisy on the OP - but the key is the absence of mains bourne RF noise. With Hugo 2, adding the unit makes no difference to the SQ, and it's the issue of RF noise that is key, not the noise on the OP. Also, it's...

USB operation is always 32 bits - when you have a 16 bit source, the bottom 16 bits are simply set to zero. You need to ensure that the data is bit perfect, that means the source does not upsample nor convert the data in any way. You will get poor results if a 44.1k file is upsampled, so check...

It's the leakage current from the PSU creating issues with the amp - that's why a battery elimates it as it has no leakage current from the mains. Simply earth Qutest and it will go away. You can earth the BNC inputs, RCA outputs, or use an earthed USB PSU. Or you could unscrew one of the...

I am afraid you are not going to like my reply! You say "noticeable improvement in the high frequency extension" and "bass could get a little loose and that is no longer the case with the Sbooster" are classic examples of the degradation induced by more noise floor modulation. And you are...

...section - I have copied directly from Hugo 2 to Qutest. You may argue that this was unnecessary, as the distorted currents drawn on the power supply with Qutest is much lower - but this strategy worked so well I did not want to take the risk. And I know that distortion from the other chanel...