Jon Sonne
Member of the Trade: Lucky Ears
- Joined
- Dec 9, 2014
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Now before you start a flame war please read my post thoroughly.
Most people here on the sound science forum agree that replacing a headphone cable do not make any audible difference what-so-ever and while I also also agree to this, it has come to my attention lately that in some rare cases, headphone cables could make an audible difference.
The case that I am thinking of is when you use replacement cables for low impedance in-ear monitors (IEM). Some IEM have very low impedance, and as you probably know, this means that you need an amplifier with a very low output impedance in order to have a high damping factor. Without a high damping factor, you will get poor bass fidelity, and depending on the headphones' impedance response, alterations in the frequency response of your headphones.
As cables are also included in the calculation of the source impedance*, a high impedance cable could change the way a low impedance IEM sounds.
*from wikipedia: "The source impedance (that seen by the loudspeaker) includes the connecting cable impedance". Which means if you have a high impedance cable and use it with a low impedance IEM, you might experience the above mentioned problems.
One example could be the Unique Melody 3X, which has a impedance of approx. 14 ohms throughout the bass region and an uneven impedance in the mids and treble with min/max of 12/18 ohms. If we were to use this earphone with, lets say, the Linum Music cable, which has an impedance of 5.3 ohms, the damping factor would only be 2.6 below 200 Hz, 3.4 at best and 2.3 at worst (assuming that the source impedance is 0 ohms). Now, I do not own the Unique Melody 3X, nor do I have the Linum Music cable, so this is purely a hypothetical example, but surely there must be real life examples of low impedance IEM that are used with cables that have high impedance, given the many options in both categories.
If you have better examples of low impedance IEMs and/or high impedance replacement cables, please let me know.
/Jon Sonne
Most people here on the sound science forum agree that replacing a headphone cable do not make any audible difference what-so-ever and while I also also agree to this, it has come to my attention lately that in some rare cases, headphone cables could make an audible difference.
The case that I am thinking of is when you use replacement cables for low impedance in-ear monitors (IEM). Some IEM have very low impedance, and as you probably know, this means that you need an amplifier with a very low output impedance in order to have a high damping factor. Without a high damping factor, you will get poor bass fidelity, and depending on the headphones' impedance response, alterations in the frequency response of your headphones.
As cables are also included in the calculation of the source impedance*, a high impedance cable could change the way a low impedance IEM sounds.
*from wikipedia: "The source impedance (that seen by the loudspeaker) includes the connecting cable impedance". Which means if you have a high impedance cable and use it with a low impedance IEM, you might experience the above mentioned problems.
One example could be the Unique Melody 3X, which has a impedance of approx. 14 ohms throughout the bass region and an uneven impedance in the mids and treble with min/max of 12/18 ohms. If we were to use this earphone with, lets say, the Linum Music cable, which has an impedance of 5.3 ohms, the damping factor would only be 2.6 below 200 Hz, 3.4 at best and 2.3 at worst (assuming that the source impedance is 0 ohms). Now, I do not own the Unique Melody 3X, nor do I have the Linum Music cable, so this is purely a hypothetical example, but surely there must be real life examples of low impedance IEM that are used with cables that have high impedance, given the many options in both categories.
If you have better examples of low impedance IEMs and/or high impedance replacement cables, please let me know.
/Jon Sonne