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When you mean 'behind the speakers' you probably mean before the speakers (the electronics). When there are actual audible differences in the electronics they will be very measurable. There certainly can be differences between electronic systems that reach audible levels because of interaction...

A real ground lift switch keeps the safety ground connected and only disconnects (or uses a high ohmic resistor + capacitor in parallel) the safety ground to the signal 'ground/common'. I reckon there are manufacturers that may not do this properly.

Agreed ... I always mention (and list) them in my reviews.

Headphones with a single 3-pin connector in the headphone can not be used with balanced gear. When there are 4.4mm cables for it (that have 4.4 plug and 3-pin for a specific headphone) they can be used with most gear having a 4.4mm socket. That gear, however, must be wired internally so that...

Whenever someone 'changes' something in any system they will listen more carefully (to detect differences). It is the main reason why subjective found differences usually are improvements. That's what the whole hifi branch depends on.

In that case also the pace and timing would be off ? Pitch control anyone ?

acc. to the map none of those UFOs seem to cross the pond to the Netherlands and seem to hover above the U.K. mostly. At least 9 of them might be crossing over to France but the distance between U.K. and France is the shortest.

It is very simple... just look at contact surface area and mechanical construction and fixing methods on PCBs. It is clear USB-B is the better one but too big for portable devices.

Small connectors (as used in portable gear) are not nearly mounted as securely and have smaller contact surfaces as larger connectors. Sure... the small connectors on portable devices are plugged in/out much more often and creates more failures. Most of these failures are due to 'mishandling'...

When you have a ground loop you solve this by connecting all involved devices to the same wall outlet and if that does not help you must solve it in the connections between the devices. as @KSTR stated.. safety ground is there for safety reasons do not disconnect. When you do disconnect one of...

I do have plenty USB-micro, USB micro-B, USB mini and USB-C devices around too. Mostly on portable devices though. Have had (and still see) plenty of bad connections on the small ones and never with USB-B which has much better contact area, the PCB connectors are mounted much better as well. I...

All audio interfaces I have here use USB-B and vastly prefer that over the mini/micro and USB-C. USB-B connections have never given me any trouble unlike those small ones. USB-A is often found on USB dongles.

You would need to do signal processing + drive 2 (identical) DACs at the same time (I2s or SPDIF). Not a very practical solution but fun if you want to experiment with DSP and 2 DACs (or a DAC that has 4 or more channels).

Won't work well in practice. There are many solutions for this both passive and active, DIY or built devices.

Are those the tools or are you calling people using measurement tools 'tools' or is the word 'tools' one of your tools to sow doubt ? ;) You clearly do not understand measurements. So yes, yes we do know that with absolute certainty. You just formulate it this way so the burden of proof is not...

CDP-XA5ES ? this one is 1995 so ... 30 years old.

Had something like the CXD2565M DAC chip in it with an output similar to that of DSD (but was PCM to DSD conversion) and required steep filtering to get rid of the substantial HF noise it generated. This is why current converters are multibit DS. Makes the post filtering much more simple to do...

IMO the only one doing technological improvements with magneto planar drivers is @Dan Clark. Rinaro is trying too with isodyamics combined with planar magnetic where the isodynamic part is pointing to the ear entrance. Seems more gimmicky than real progress though. If only he could get the...

Ah... turns out XLR and RCA use the same input. In high gain the max. input voltage is merely 2.1V both for RCA and XLR so any balanced DAC will clip the XLR input on gain III. On gain 1 and 2 the inputs can handle 7V. It looks like the gain is done before the volume control (ala O2) and the RCA...

Ermm no... There isn't a single amp on this planet that peaks or does not amplify right at 6kHz. That ... sure. You simply cannot use just any amp for any speaker and expect all loads to be driver well by all amps. What are classic measurement tools ? What are 'defaults' that have to be...