since mostly every headphone i ever owned was single ended, i would call me a single ended guy, that dont cares for balanced at all. i did some recablings to balanced but never felt worth it afterwards. But since listening almost exclusively to earbuds, i wonder if i could use an aftermarket balaced cable at least on my detachable buds. Sorry, but i dont know anything about physics, could this work or would i roun the buds, using a balaced cable and amp?
Let us not forget the potential of crosstalk which (in this case) is defined as:No, it will not ruin your earbuds.
Re-cabling a fixed cable or replacing a mmcx/2-pin earphone cable to balanced will open a "power" doorway found on many of today's available audio source devices. The additional power offered by balanced earphone outputs (e.g. 4.4TRRRS, 2.5TRRS, 3.5TRRS) can give you better low-end performance, as well as improve dynamics with certain drivers especially if they are of higher impedance and/or of lower sensitivity.
Additionally, using a difficult to drive pair of earphones with a balanced, instead of the single-ended, output connection will in many cases reduce the volume and in-turn may lower the demand on the amplification circuit/section of your device. E.g. a close to max volume setting using single-ended output may be pushing your device too hard to 90% plus efficiency-capability demand levels... using the balanced output instead will lower the required volume and may significantly reduce the demand on the amplification circuit/section and in-turn increase the life-span of the said device.
A possible negative side effect of an unbalanced connection (line level or headphone) is the potential for unwanted noise, interference or hum to be introduced to the signal. Because the ground is linked, wayward currents from power supply transformer leakages or stray capacitance can become part of the audio signal.
This isn't nearly as relevant as it used to be because most manufacturers implement this in a much better way (from the amplifier) than they used to. Having said that, here is a pretty good article that might help with explaining balanced vs. unbalanced or single ended, and relevant information that relates to this.
Edit: As for your connections, interconnects, amplifier output, and driver wiring there is a good rule of thumb to think of here to keep your equipment safe from harm. If your head gear is wired in a balanced way (read separate grounds for each driver), then you can use either a balanced or single ended interconnect. So if you are looking at the cable connection (where it connects to your source), you can use either 3.5mm SE or 2.5mm balanced or 4.4mm balanced. But.... if your drivers are not wired this way, or your cable only uses 3 wires (L R G) then you cannot use those balanced connectors from your source because you will short out the grounds. This could burn up your amplifier, transducers, or both. Anything having a wire coming into each driver is generally wired as a balanced connection, whereas anything with just one wire coming into one side could be SE or balanced. It is up to you to know which it is, so that you can decide whether to use a balanced wire interconnect or not.
So:
- 3.5mm SE - 3.5mm SE or 4.4mm balanced or 2.5mm balanced = OK
- 2.5mm balanced or 4.4mm balanced - 3.5mm SE = BAD

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