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post #16 of 24
Quote:
Originally Posted by DScience View Post

Well I have some things to report. 

 

First, I ended up getting a pair of the ATH-AD900X, in fact they just arrived and I'm giving them a listen. Initially I couldn't tell that big of a difference between these and the AD700's. The bass was obviously more pronounced, but it took a few songs to compare and now I am starting to realize. One way to explain the sound is the 900's seem cleaner, if that makes sense. The highs and mids don't sound as artificial. That's it! I think the main difference is the music simply sounds more realistic. Each instrument, and each different sound has it's own character. 

Well needless to say I really enjoy these and am glad I invested the extra bit. Now the next step is figuring out the input set up.

After considering all of the suggestions, I am considering the following possibilities:

1) Invest in a Asus essence STX, use it to power both speakers (Klipsch promedia 2.1 for now) and headphones (AD900X).

a) Also get a FiiO E09K: STX -> E09K -> headphones; STX -> speakers

2) Use onboard sound card for gaming (it works fine for me) and get a nice DAC/headphone AMP for music. 

The STX and Fiio E09K use the same TI 6120 headphone amplifier chip.

 

Give the AD900X some break in time, you will like them even more.

As the AD900Xs are only 40-Ohm, you would want a headphone amplifier with a lower impedance then the STX's 10-Ohm.

 

Schiit Magni external headphone amplifier, $99, has an impedance of less then 1-Ohm :) and as it is external, can be used with more then the computer.

 

Asus Xonar DX or D1 sound card, sells used for $50-$60, same audio processor (CMI8788) as the Essence STX.

With the Xonar DX/D1, you can then plug the Schiit Magni into the computer's front panel headphone jack and leave the speakers plugged into the Xonar's back panel.

Still think once the AD900X have broken in, you will stop using the Klipsch anyway.

post #17 of 24
Thread Starter 
Quote:
Originally Posted by PurpleAngel View Post

The STX and Fiio E09K use the same TI 6120 headphone amplifier chip.

 

Give the AD900X some break in time, you will like them even more.

As the AD900Xs are only 40-Ohm, you would want a headphone amplifier with a lower impedance then the STX's 10-Ohm.

 

Schiit Magni external headphone amplifier, $99, has an impedance of less then 1-Ohm :) and as it is external, can be used with more then the computer.

 

Asus Xonar DX or D1 sound card, sells used for $50-$60, same audio processor (CMI8788) as the Essence STX.

With the Xonar DX/D1, you can then plug the Schiit Magni into the computer's front panel headphone jack and leave the speakers plugged into the Xonar's back panel.

Still think once the AD900X have broken in, you will stop using the Klipsch anyway.

I'm really confused about the impedance. I understand that the AD900X are 40-ohm (the specs say 38). And, I also read that the STX has a 600 ohm headphone amp. Where does the 10-Ohm impedance come into play? I keep thinking about the equation V=IR and I just can't wrap my head around it.

 

Now about the other option, where is the best place to get the Schiit Magni? I don't see how this thing will hook up to the front panel headphone jack, because when I look it up online it appear it requires RCA cables to hook it up?


Edited by DScience - 8/14/13 at 2:11pm
post #18 of 24
Quote:
Originally Posted by DScience View Post

I'm really confused about the impedance. I understand that the AD900X are 40-ohm (the specs say 38). And, I also read that the STX has a 600 ohm headphone amp. Where does the 10-Ohm impedance come into play? I keep thinking about the equation V=IR and I just can't wrap my head around it.

 

No about the other option, where is the best place to get the Schiit Magni? I don't see how this thing will hook up to the front panel headphone jack, because when I look it up online it appear it requires RCA cables to hook it up?

It's considered better to have the impedance (Ohms) of the headphones to be 8 to 10 times the impedance of whatever jack they are plugged into.

(otherwise you might get a bloated bass)

So if you have 38-Ohm headphones, you want to plug them into a jack that is 3.8-Ohm or less

You can have 600-Ohm headphones plugged into a headphone amplifier only 1-Ohm impedance, the headphone impedance is 600 times the impedance of that headphone amplifier, which is fine.

The STX is rated for headphones up to 600-Ohm, I have use from a 32-Ohm to 600-Ohm headphone(s) with my STX.

I use my ATH-A900X (42-Ohm) plugged into my Essence STX and they sound fine. but normally I use my A900Xs plugged into my 02 (Objective) headphone amplifier, which is plugged into the RCA outputs on my STX, the 02 has a low less then 1-Ohm impedance like the Magni.

 

You can use a 3.5mm (1/8") to RCA (red/white) cable to connect the Schiit amp to any 3.5mm jack.

A 3.5mm jack is just a smaller and cheap way for doing the same thing the RCA (red/white) jacks do.

Both can carry two channels (stereo) of PCM analog audio signals.

 

You can order Schiit products at the Schiit website.

post #19 of 24
Thread Starter 
Quote:
Originally Posted by PurpleAngel View Post

It's considered better to have the impedance (Ohms) of the headphones to be 8 to 10 times the impedance of whatever jack they are plugged into.

(otherwise you might get a bloated bass)

So if you have 38-Ohm headphones, you want to plug them into a jack that is 3.8-Ohm or less

You can have 600-Ohm headphones plugged into a headphone amplifier only 1-Ohm impedance, the headphone impedance is 600 times the impedance of that headphone amplifier, which is fine.

The STX is rated for headphones up to 600-Ohm, I have use from a 32-Ohm to 600-Ohm headphone(s) with my STX.

I use my ATH-A900X (42-Ohm) plugged into my Essence STX and they sound fine. but normally I use my A900Xs plugged into my 02 (Objective) headphone amplifier, which is plugged into the RCA outputs on my STX, the 02 has a low less then 1-Ohm impedance like the Magni.

 

You can use a 3.5mm (1/8") to RCA (red/white) cable to connect the Schiit amp to any 3.5mm jack.

A 3.5mm jack is just a smaller and cheap way for doing the same thing the RCA (red/white) jacks do.

Both can carry two channels (stereo) of PCM analog audio signals.

 

You can order Schiit products at the Schiit website.

I get it now, thank you so much for explaining it!

 

However, i'm assuming then you mean to plug the 3.5mm to RCA into the magni, then the 3.5mm into the front headphone jack of my computer.

 

Here is my question: That front jack, which is on my computer case, is plugged into the MOBO. I have no idea, but will this reduce the quality of the signal? I mean, I can't imagine that the cables supplied by cooler master (maker of my case) are very audiophile friendly. 

post #20 of 24

The STX has sufficient output power to drive headphones up to 600ohms - but it doesn't have a 600ohm output impedance!

 

The output impedance is actually 10 ohms (under load).  In an ideal scenario - damping - you'd be using it with headphones that are 80 ohms impedance or higher (the 1:8 rule).

post #21 of 24
Quote:
Originally Posted by DScience View Post

I get it now, thank you so much for explaining it!

 

However, i'm assuming then you mean to plug the 3.5mm to RCA into the Magni, then the 3.5mm into the front headphone jack of my computer.

 

Here is my question: That front jack, which is on my computer case, is plugged into the MOBO. I have no idea, but will this reduce the quality of the signal? I mean, I can't imagine that the cables supplied by cooler master (maker of my case) are very audiophile friendly. 

Yes, cable from Magni (RCA) to front headphone jack (3.5mm).

 

The Xonar DX/D1 comes with a connector (same as motherboard) for the front panel headphone/mic.


Edited by PurpleAngel - 8/23/13 at 10:53am
post #22 of 24
Thread Starter 
Quote:
Originally Posted by Brooko View Post

The STX has sufficient output power to drive headphones up to 600ohms - but it doesn't have a 600ohm output impedance!

 

The output impedance is actually 10 ohms (under load).  In an ideal scenario - damping - you'd be using it with headphones that are 80 ohms impedance or higher (the 1:8 rule).

I think i'm starting to understand. One of the problems is these things aren't exactly streamlined in terms of specifications on websites. confused.gif

 

Thanks for your help.

post #23 of 24
Thread Starter 
Quote:
Originally Posted by PurpleAngel View Post

Yes,cable from  Magni (RCA) to front headphone jack (3.5mm).

 

The Xonar DX/D1 comes with a connector (same as motherboard) for the front panel headphone/mic.

Thanks, I think I figured it out. Although I haven't decided exactly what I am going to do. Right now I am really happy with the Asrock  extreme6 z87's on-board sound. Here is a link for their website explaining the features. Anyway it has 115 DB SNR, and a 600 ohm amp. I am hoping this will hold me over for a month or so. But, then I am not sure what to do. Here are the issues i'm facing:

 

1) I want to have both speakers and headphones plugged in, so I don't have to switch constantly, without reducing the quality. I'll eventually get better speakers, but for now the klipsch's will have to do.

 

2) I'm debating between the DX and the essence STX. With the DX i'll have to get the Schiit Magni, because the DX won't push my headphones enough (I think). 

post #24 of 24
Thread Starter 

Just to update, I ended up getting the creative Z. It was OK. But then I got the Asus STX, and WOW! I honestly now think these headphones are finally getting what they deserve. I know it could be better if I got some external stuff, but for now I want to get used to this set up. I am so impressed with the sound quality of the STX. I would go as far as to say it's the best quality sound i've personally ever experienced (with the AD900X's of course). 

 

Thanks for all the feedback and help!

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