Here's a GIF of the graphs.   The red circles show the area of issue. It is clear that these are not caused by an echo since each channel gets them when the other channel plays the pluck.     This shows that channel isolation eliminates the issue. The mic and cable positions were...

Again, you're just talking numbers. I actually measured crosstalk with mics. No matter what the specifications and the theoretical say, the fact remains that crosstalk, at least with this audio interface, is an audible and measurable phenomenon, as noted in post 3. With regards to why it occurs...

Well, yes and no. What I've done is see what happens when everything is kept constant except for the way the cans are driven.   The waveform graphs show the behavior of the diaphragm. If a "balanced" signal shows any difference from the unbalanced signal, then there should be a change in how...

I'm back!   True to my word, I have tested the "pseudo-balanced" drive setup. This was done with the right channel only. Balanced output was achieved by duplicating the right channel in the previous test audio track then inverting it. For unbalanced output, I did a mono feed to right channel...

My observation with the 30Hz square was that throughout the entire 15-second interval, the same difference consistently showed up. The 1dB difference might cause this, might not, we'll see. The saw wave is slight enough to be environmental, though.

Focusrite claims <10Ω on the output impedance. I am not sure if it's the line balanced output or the headphone output impedance, but I will note this in the next few measurements that I make.   Worthy of note is that these are not hi-fi devices, but rather are purpose-built to be reference...

The 30Hz square graph dips more after the peak on the balanced samples than on the unbalanced samples. The balanced sawtooth samples have a higher arch than the unbalanced ones.  Quick overlay does a better job than my words.    

I wanted to make the adapters myself with the SPC wire. The trouble was getting reliable parts from China, especially the TRRS female connector; shipping time exceeded 3 weeks. Then there's the issue of Litz braiding in proper twisted pairs...but at that point I think I just went overboard :p  ...

Here's data backing my findings. I tried to record as best as I could, using two Samson C02s in XY configuration at point blank; the mics did not move between recordings. The samples played were in order: Square 300Hz no alias, Square 30Hz no alias, Saw 100Hz, Sine 1000Hz, Logarithmic sine sweep...

Update: See post #3 for download link to graphs and recordings.     **UPDATE 2: post #36 has even better data.** There is no real difference in sound quality between balanced and unbalanced other than the elimination of crosstalk.     Introduction   I work as an audio engineer on the...

Yes, they've been soldered up and each terminal wrapped in plastic for insulation. Even tried without the outer shell in case the terminals are shorted by the metal cover.   I finished up my second breakout cable using the exact same connector (I ordered 2). This one shorts the left and right...

Hi,   I've recabled my HD 25-1 II into 4-conductor balanced mode and plan to test balanced vs. unbalanced by way of breakout cables leading from the 4-conductor TRRS 3.5mm jack on the headphone to 1/4" dual TRS for balanced and single 3.5mm TRS for unbalanced.   The issue is that after...

Hey guys!   I got my SPC cable from Navships today; I plan on using it to recable my HD 25-I and make it a balanced output (will follow up with balanced vs. unbalanced test results when the mod is done). Balanced headphones, as you know, require 4 cables and thus a Litz braid, which I find...

Hi!   I'm planning a little project to turn my HD25-1 II and HD 668B balanced. For the cables I'm planning to use SPC 28 AWG, but the connectors I'm having a bit of a harder time with.   I'm thinking of terminating my HD25-1 II's balanced connection with a TRRS connector instead of a 4-pin...

Hi guys! I'm curious as to what kind of EQ you have on. I know most of us don't have it (I don't have on most of the time) but it's still interesting what kind of sound signature you exactly want.     For example, I just made this EQ according to Tyll's data on the HD668B to give it a flat...