Oh, I wasn't paying attention to the "return" word, so you mean the ground on the stock Verum cable isn't isolated for each channel but tangled from where 2 cables merge into one, thus the V vs Y return structure right?No, 4-wire SE. Full-length return wires come from both drivers and connect together at the sleeve terminal of the TRS plug going to the amp. This can give you a good -15 dB in the crosstalk vs. a Y-shaped return, which effectively doubles the crosstalk rejection for the Verum 1 because it's already at only -15 dB with the stock cable. Of course you could also do this with a "balanced" cable if you had a TRRS to TRS adaptor or if the amp socket was made to short the two returns together for SE operation. (The point is I'm not talking about a benefit of "balanced" amps, just the better cable.)
I'm sorry I'm a noob here, just trying to learn. How did you measure the 1.8Ω? I don't have my multimeter anymore but if it can say anything, I measured the resistance of Verum with the Hifiman cable at 6.5/7.2Ω.that super-thin shoelace-soft AliExpress cable they ship with has a ton of common ground resistance because of its "Y" return wire structure and thin wires used (1.8 ohms per channel!). You do the voltage divider math vs. the 6-8 ohm driver and you can immediately see the crosstalk is atrocious
So if I understand correctly, if it's a Y structure it would be less than twice because it needs to travel only to the point where they merge?maybe first try to confirm the one you have is really 4-wire: when you measure the resistance from the sleeve of the left cup plug to the sleeve of the right cup plug it should be 2x the resistance from either of those to the sleeve of the amp-side plug, showing a "V" structure of the return wires.
I wasn't paying too much attention to the soundstage, just tried to swap them back and forth a few times and couldn't tell the difference. Then, I was using them with the Hifiman cable the whole time and even with that cable, the soundstage was quite disappointing. I would say the soundstage and imaging were about the same as HE4XX - claustrophobic soundstage and average imaging. And even the tuning was actually quite similar except for the treble being more neutral on Verum. Oratory's measurement also supports it:Maybe try more songs, get a more quiet environment, pay more attention, switch the cable faster, pause in the middle of the same song when you switch the cable... IDK. There are many reasons you wouldn't hear the difference, but electrically it's there, it's undeniable. I heard the difference with the 2016 HE-400i cable
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