@chargedcapacitor (correctly) refers to the fact that the headphones may be over damped - you don’t want the ratio between the amp output impedance and headphones load impedance to be neither too high nor too low. Proper damping means the drivers react to current with a desired level of damping (think of the rate of decay of water circles when a stone is thrown and bounces across a pond)
That said, damping is also comprised of other factors beyond the impedance ratios, such as the materials and housing of the headphone drivers. The natural resonance of the headphone (and how its FR will be impacted by varying impedances) may also come into play.
Therefore, some rule of thumbs (like 8 to 1 ratio) are often overridden (e.g. using utopia on otl amps works great) though they are great sanity check in many cases.
So the true golden rule in audio applies — the only way to find out if something fits, is to (safely) stick a plug in, and just discover the synergies (or lack thereof)![Man shrugging :man_shrugging: 🤷♂️](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f937-2642.png)
That said, damping is also comprised of other factors beyond the impedance ratios, such as the materials and housing of the headphone drivers. The natural resonance of the headphone (and how its FR will be impacted by varying impedances) may also come into play.
Therefore, some rule of thumbs (like 8 to 1 ratio) are often overridden (e.g. using utopia on otl amps works great) though they are great sanity check in many cases.
So the true golden rule in audio applies — the only way to find out if something fits, is to (safely) stick a plug in, and just discover the synergies (or lack thereof)
![Man shrugging :man_shrugging: 🤷♂️](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f937-2642.png)