best headphone impedance image
burningice
I have been looking at headphones and was getting confused about the difference between sensitivity and impedance.
-I've been told that sensitivity is: The higher the rating, the louder your headphones will play.
- Impedance is: Generally, the higher the impedance, the more electrical energy is required to drive the headphones' tiny speakers. Because of the limited power available from a portable player, headphones for portable use should have a maximum impedance of 64 ohms. The lower the impedance, the more efficient the headphones.
It seems to me that they are counteracting each other, can someone explain the difference?
Answer
Impedance is a measure of the electrical resistance in the headphones. Usually only expensive audiophile headphones for the home will have very high impedance, and they are often sold with their own amplifier. The sensitivity rating is a real-world measurement of the volume output by the drivers, usually measured at a power level of 1 milliwatt. That's the only number you should be interested in. The two are related, but the sensitivity in SPL (sound pressure level) is what is important in actual use. Any unit with a SPL rating of 90dB or higher will be fine for use with a portable music player, though the higher the higher the number, the less high you'll need to set the volume on the player. Getting a more sensitive pair of headphones or earbuds can extend battery life a little bit, but basically anything you'll find for sale at a regular store will work fine for portable players.
Impedance is a measure of the electrical resistance in the headphones. Usually only expensive audiophile headphones for the home will have very high impedance, and they are often sold with their own amplifier. The sensitivity rating is a real-world measurement of the volume output by the drivers, usually measured at a power level of 1 milliwatt. That's the only number you should be interested in. The two are related, but the sensitivity in SPL (sound pressure level) is what is important in actual use. Any unit with a SPL rating of 90dB or higher will be fine for use with a portable music player, though the higher the higher the number, the less high you'll need to set the volume on the player. Getting a more sensitive pair of headphones or earbuds can extend battery life a little bit, but basically anything you'll find for sale at a regular store will work fine for portable players.
How many ohms should my headphones be for Ipod?
doyle d
How many ohms can my ipod power well without a headphone amplifier? How high of impedance headphones should i get with my ipod?
Answer
for an ipod you shouldn't have to worry about that. I had the ipod earphones with my 2G touch and they went quiet in one ear after about 1-2 months. so now i have in ear Sony earphones that are ridiculously good quaility and have great bass, noise isolating and cost about $80 AUD. just buy anything from sony, most reliable. my last ones lasted me for about 4-5 years :)
for an ipod you shouldn't have to worry about that. I had the ipod earphones with my 2G touch and they went quiet in one ear after about 1-2 months. so now i have in ear Sony earphones that are ridiculously good quaility and have great bass, noise isolating and cost about $80 AUD. just buy anything from sony, most reliable. my last ones lasted me for about 4-5 years :)
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