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What is the real impedance of Shure SE425?

post #1 of 5
Thread Starter 

Hey Guys!,

 

I'm a bit confused on the impedance of Shure SE425, on the Shure's official website it has 22ohms, while on headroom they said it has 37ohm, so what the real specs for this?

 

Here are the links:

 

http://www.shure.com/americas/products/earphones-headphones/se-models/se425-sound-isolating-earphones

 

http://www.headphone.com/headphones/shure-se425.php

 

I'm just a bit concern because if the real impedance is 37ohm, I will get myself an amp,

 

Thanks guys!

post #2 of 5

graphCompare.php?graphType=0&graphID[]=2748

 

If you check out the impedance graph, it goes up in the higher frequencies...Shure must have taken the measurement at a different frequency than Headroom or something.  Impedance is basically just variable resistance at different frequencies.  I don't see a sensitivity rating though...

 

Still, you probably don't have to worry about an amp, most IEMs don't need them.  The impedance rating is virtually irrelevant.

post #3 of 5
Thread Starter 

Thanks DaBomb!, you have helped me again.

post #4 of 5
Quote:
Originally Posted by Rainman26 View Post

Hey Guys!,

I'm a bit confused on the impedance of Shure SE425, on the Shure's official website it has 22ohms, while on headroom they said it has 37ohm, so what the real specs for this?

Here are the links:

http://www.shure.com/americas/products/earphones-headphones/se-models/se425-sound-isolating-earphones

http://www.headphone.com/headphones/shure-se425.php

I'm just a bit concern because if the real impedance is 37ohm, I will get myself an amp,

Thanks guys!

the box says 22. Pretty sure it's quoted at 1-2khz anyway. Sensitivity quoted on the box is 109 db SPL/mW
post #5 of 5

It's probably 22 ohms.

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