Amazon selling fake cables?

[AnalogSteph]

In this case the 4.4 mm output is just a mechanical adapter so you can use headphones already wired with this type of connector. It just moves the point at which the wiring is split from the headphones into the amp, basically - with a Sennheiser HD6**, the same would be taking place inside the cable at the plug instead.* Output is the same from both jacks.

*) And that's the important part, getting the two drivers' ground returns separated at the start of the headphone cable. The shared return resistance of plug + jack is basically negligible, we're talking maybe 40 mOhms (for 3.5 mm) as opposed to ~1 ohm for a typical 3 m Sennheiser cable. Balanced driving is thus nice to have and may enable higher output if the amplifier is built accordingly, but it is not essential. Topping gets lots of output and impeccable measurements even with all-unbalanced circuitry, and at the end of the day this is what counts.

 

[audiofilet]

Wow, ok that makes sense, thank you!

It confused my why even more expensive amps would only offer RCA in, but still have a balanced HP jack. Yeah, there you go.

Is there a difference in quality between an internally rebalanced signal and one that remains balanced all the way from the DAC to the amp without any extra steps inside the amp?

 

[solderdude]

The funny bit about the drawing is that it does not seem to be really connected as it is in the block diagram (not schematic)

Firstly the specs say +10dBu yet in the block diagram it states +4dBu.
That would only make sense if +10dBu (2.4V) is for balanced and +4dBu is for SE (1.2V)
Also the phones out state 1.5mW in 40 ohms, specs say 6mW (so again +6dB).

I have not seen any measurements from anyone confirming either +4dBu or +10dBu.

The second funny thing is that the line out drawing of the TRS could never work with a balanced nor a TS plug.
When one connects the same signal between the + and - in balanced you end up with NO signal. So for balanced the drawn connector cannot possibly work.
When one were to use a TS plug then the ring would be shorted to ground. The tip and ring are connected in the drawing which would short the output so no signal would come out.

So... the block schematic is incorrect for its line-outs.

Most likely the drawn volume controls are followed by an opamp buffer and perhaps even is balanced (headphone out will be SE for certain)

 

[escksu]

Wow, ok that makes sense, thank you!

It confused my why even more expensive amps would only offer RCA in, but still have a balanced HP jack. Yeah, there you go.

Is there a difference in quality between an internally rebalanced signal and one that remains balanced all the way from the DAC to the amp without any extra steps inside the amp?

The whole purpose of balanced signal is for noise rejection, not about audio quality. So, for your question, the answer is no.

 

[AnalogSteph]

So... the block schematic is incorrect for its line-outs.

Indeed. I presume it's an ordinary impedance-balanced output (as you would expect) and they merely screwed up the connections when drawing. +10 dBu out is about right for than and +/-5 V supplies.

 

[babadono]

The block diagram schematic from the UR22 mkII manual shows that the line outputs are single ended, not balanced (differential).

If you put a TS plug into this output you will short the signal to the chassis! Unless of course the diagram is incorrect.

 

[NTK]

If you put a TS plug into this output you will short the signal to the chassis! Unless of course the diagram is incorrect.

That's what most people here suspect.

 

[sarumbear]

The obvious difference between a TRS and TS cable:

Lately, I've been looking for a 2x 1/4" TRS - 2x RCA Cable

I could only find one cable specifically named 2x TRS - 2x RCA

It looks like this:

2 * 6,35mm 1/4 Zoll TRS Stereo Jack Stecker to 2 RCA Stecker Chinch Audio Kabel Splitter

In comparison, another cable advertised as TS, by a different manufacturer, looks exactly the same:

(It's Amazon.de bcause I'm German / "Männlich" = "male" / "Kablel" = "cable" / "1/4 Zoll" = "1/4 inch" )

2 x 6,3mm (1/4 Zoll) TS Männlich auf 2 Cinch Männlich Stereo Audio Adapter Kabel
View attachment 152667

Could it be that a Split 6.3mm simply misses the second ring for the sleeve, while still being balanced?

RCA connector is not a balanced connector. Why are you concerned with the 1/4” jack connectors?