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Recommend a desktop amp for Titanium HD + HD 598 - Page 4

post #31 of 58
Well, I picked up an e9 myself. I wasn't expecting some huge difference. I really just wanted some hardware volume control and to be able to switch between my speakers and headphones without reaching to the back of my PC. It does seem to clean up the sound a bit a higher volumes, and I'm talking with the slider set to 90% or so. I noticed that unamped the HD598 can sound a bit bright compared to off the e9. It seems to have bought out the mids at high volumes. I'm also not noticing any distortion at low volumes or at all which I was worried about. This is just my first impressions after a couple hours of use for whatever thats worth.
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post #32 of 58
Quote:
Originally Posted by BababooeyHTJ View Post

Well, I picked up an e9 myself. I wasn't expecting some huge difference. I really just wanted some hardware volume control and to be able to switch between my speakers and headphones without reaching to the back of my PC. It does seem to clean up the sound a bit a higher volumes, and I'm talking with the slider set to 90% or so. I noticed that unamped the HD598 can sound a bit bright compared to off the e9. It seems to have bought out the mids at high volumes. I'm also not noticing any distortion at low volumes or at all which I was worried about. This is just my first impressions after a couple hours of use for whatever thats worth.


you are setting the gain in the E9 to 90% cryingsmiley.gif. Press teh switch in the back to high gain cause mine at 50% gain in E90 can easily destroy my ears drumps.
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post #33 of 58
Quote:
Originally Posted by eduardmc View Post

you are setting the gain in the E9 to 90% cryingsmiley.gif. Press teh switch in the back to high gain cause mine at 50% gain in E90 can easily destroy my ears drumps.

I think he's referring to the windows sound slider, not the knob on the e9.

Is it really ok to use the high gain option on the e9 with low impedance/high sensitivity headphones like the 598's? I wanted to try the high gain setting with my ATH-A900 but was worried about damaging the drivers.
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post #34 of 58
Quote:
Originally Posted by tr8rjohnk View Post

I think he's referring to the windows sound slider, not the knob on the e9.
Is it really ok to use the high gain option on the e9 with low impedance/high sensitivity headphones like the 598's? I wanted to try the high gain setting with my ATH-A900 but was worried about damaging the drivers.

Well, I've been using it since I forgot all about the gain switch and my headphones are fine. I never turned the volume knob up very much though. I'm sure that if you were to crank the dial with high gain mode on that you could blow the drivers though.
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post #35 of 58
The sweet spot for the volume knob on the E9 is the 9-12 o'clock position.
    
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post #36 of 58
Quote:
Originally Posted by tr8rjohnk View Post

I think he's referring to the windows sound slider, not the knob on the e9.
Is it really ok to use the high gain option on the e9 with low impedance/high sensitivity headphones like the 598's? I wanted to try the high gain setting with my ATH-A900 but was worried about damaging the drivers.

It would be difficult to do. Audio-Technica rates the A900 at a maximum input power of 2000 mW, nominal 40 ohms impedance. FiiO E9 can only output about 7V before clipping (20V peak-to-peak, if you prefer). A full-scale sine wave at 7V would only deliver 7^2 / 40 = 1.225 W = 1225 mW to the headphones. It would also be deafeningly loud and undoubtedly way distorted. So even if you crank volume up to maximum on high gain, you're probably not going to fry them.

High gain is just a larger gain factor--a multiplication more or less--of the input so really, higher gain and lower volume setting does almost pretty much the same thing as low gain and higher volume setting.

Many other full-size headphones are rated closer to 200 mW max input though. Maybe this is because of the relatively large drivers on the AD / A Audio-Technica line?
post #37 of 58
Quote:
Originally Posted by mikeaj View Post

It would be difficult to do. Audio-Technica rates the A900 at a maximum input power of 2000 mW, nominal 40 ohms impedance. FiiO E9 can only output about 7V before clipping (20V peak-to-peak, if you prefer). A full-scale sine wave at 7V would only deliver 7^2 / 40 = 1.225 W = 1225 mW to the headphones. It would also be deafeningly loud and undoubtedly way distorted. So even if you crank volume up to maximum on high gain, you're probably not going to fry them.
High gain is just a larger gain factor--a multiplication more or less--of the input so really, higher gain and lower volume setting does almost pretty much the same thing as low gain and higher volume setting.
Many other full-size headphones are rated closer to 200 mW max input though. Maybe this is because of the relatively large drivers on the AD / A Audio-Technica line?

Thanks for that; I have a much better understanding of how everything works together now.
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post #38 of 58
OP, you might want to check this out. http://nwavguy.blogspot.com/2011/11/objective-desktop-amp-oda-dac.html

A couple of my friends at school built his portable amp, the O2, and it's amazing for the price that they built it for ($50-70 iirc). If the upcoming desktop version is anything like it I have a feeling you'll enjoy it very much.
 
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post #39 of 58
Thread Starter 
Quote:
Originally Posted by eXecuution View Post

OP, you might want to check this out. http://nwavguy.blogspot.com/2011/11/objective-desktop-amp-oda-dac.html
A couple of my friends at school built his portable amp, the O2, and it's amazing for the price that they built it for ($50-70 iirc). If the upcoming desktop version is anything like it I have a feeling you'll enjoy it very much.

Well i already have my e9 and im pretty happy with it. That is an interesting read though. Where did your friends find theirs? In the article it says it will cost ~$130 without DAC

Thanks!
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post #40 of 58
Quote:
Originally Posted by LmG View Post

Well i already have my e9 and im pretty happy with it. That is an interesting read though. Where did your friends find theirs? In the article it says it will cost ~$130 without DAC
Thanks!

$130 is the price builders would charge for a finished kit. Typically, the cost of the build is much cheaper if you can DIY.
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