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Cowon J3 Output Impedance?

post #1 of 10
12/3/11 at 6:36pm
Thread Starter 

Apologies if this has been answered before, but I did do a forum search and drew a blank.

 

 

As per the thread title, does anyone know the output impedance of the Cowon J3 ?

 

Thanks

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post #2 of 10
12/3/11 at 9:30pm

 

From 1.5 - 2, according to this thread - http://www.head-fi.org/t/563722/jvc-ha-fxt90-appreciation-thread-user-info-buying-guide-reviews-on-page-1

 

 

I use Teclast T51 which is 0.4

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post #3 of 10
12/4/11 at 1:14am

Haha, I was just gonna ask about the 601 and I saw this thread..

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post #4 of 10
12/4/11 at 6:49am
Thread Starter 
Quote:
Originally Posted by kiteki View Post

 

From 1.5 - 2, according to this thread - http://www.head-fi.org/t/563722/jvc-ha-fxt90-appreciation-thread-user-info-buying-guide-reviews-on-page-1

 

 

I use Teclast T51 which is 0.4



Many thanks for that, kiteki, although I do wonder where the source for those measurements is.

 

I've just sent Inks a PM to find out...

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post #5 of 10
12/4/11 at 6:57am
Thread Starter 
Quote:
Originally Posted by Kanashimu View Post

Haha, I was just gonna ask about the 601 and I saw this thread..



It's seems you and I are on a similar path - I just noticed you in the UM Miracles thread - I'm awaiting delivery of my UM Miracles at the moment. I'm hoping my J3 will drive them OK, since the Miracles are only 16 Ω

 

Good luck with your 601

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post #6 of 10
12/4/11 at 7:10am
Quote:
Originally Posted by Mython View Post



Quote:
Originally Posted by Kanashimu View Post

Haha, I was just gonna ask about the 601 and I saw this thread..



It's seems you and I are on a similar path - I just noticed you in the UM Miracles thread - I'm awaiting delivery of my UM Miracles at the moment. I'm hoping my J3 will drive them OK, since the Miracles are only 16 Ω

 

Good luck with your 601


J3 can drive far more than 16 ohm. It drives the 70 ohm hd25-1 iis just fine. And both my headphones, though easy to drive are both higher than 16 ohm. The hje900 is 26 ohm if I recall, and the TMA-1s are 32 ohm.

I'm not sure about exact numbers for output, but it is definitely the most powerful portable player that has more than 12 hours of battery life on the market. Hell, in terms of power to battery life ratio, I couldn't ask for more.

Hope that helps.
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post #7 of 10
12/4/11 at 9:10am

Kyuuketsuki,

 

There is a phenonemon known as output impedance in all amplifiers and DAP's and the lower the better, at least when multi-driver balanced-armature IEM's are in the picture.

 

If you use a DAP or amplifier with high output impedance, the frequency response will be all over the place, with as much as 26dB boost in the mids, 15dB valley in the highs, no bass, no volume, etc.! :)


Edited by kiteki - 12/4/11 at 9:11am
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post #8 of 10
12/4/11 at 9:30am
Quote:
Originally Posted by Mython View Post



It's seems you and I are on a similar path - I just noticed you in the UM Miracles thread - I'm awaiting delivery of my UM Miracles at the moment. I'm hoping my J3 will drive them OK, since the Miracles are only 16 Ω

 

Good luck with your 601


Indeed. Good luck to you as well.

Though I'm certainly trying to find some other amps/DAPs to compare with the 601 - JUST in the case that the 601 butchers the FR. Then again, if I get a sizable mids boost and a small bass boost, I won't be complaining tongue.gif

 

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post #9 of 10
12/4/11 at 7:55pm


 

Quote:
Originally Posted by kiteki View Post

Kyuuketsuki,

 

There is a phenonemon known as output impedance in all amplifiers and DAP's and the lower the better, at least when multi-driver balanced-armature IEM's are in the picture.

 

If you use a DAP or amplifier with high output impedance, the frequency response will be all over the place, with as much as 26dB boost in the mids, 15dB valley in the highs, no bass, no volume, etc.! :)



Noted, but again, I've used the J3 for a number of different headphones. Do you think that 16 ohm is too low? It should be fine since it was designed to be a portable player.

 

Also, I've heard about output impedance, but haven't really read up on their effect on headphones. I really should though. If you have any literature on the subject, it would be appreciated.

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post #10 of 10
12/4/11 at 8:00pm

 

If the J3 is 2 ohm or less then 16 ohm IEM's will be fine, 8 ohm or 12 ohm could be an issue though.

 

 

It's the S9 that has issues with 16 ohm.

 

 

Sent you a link via PM.

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