[ClieOS]

  Oh, thanks for answering, but I messed up my question.  I meant e7 not e9.  

 
Then the answer is a bit simpler - because digital volume control is disabled on the E7 in hardware, as FiiO wants user to use hardware volume control which offers better resolution. But due to popular demand, they allows for digital volume control on the model afterward.

 

[samu]

I got some problem here with the device recently. I am using E17K as USB DAC for my laptop and recently I got a rattling sounds (low volume rattling) but it is gone when I touch the device, comes and go. Also that sometimes it deliver a electric shock from the metal body and often heating. Any idea about this? 

 

[Ab10]

Question to Experts and Long Time User,
 
If I Keep USB Charge ON all the time during DAC usage via PC - Is it harmful for Battery ?
 
To my understanding isn't the battery charging function completely stooped when it reached to 100% - So it is safe ? Right ?
 
My PC DAC usage 90% Time and OTG Mobile DAC 10% Time.

 

[samu]

Question to Experts and Long Time User,

If I Keep USB Charge ON all the time during DAC usage via PC - Is it harmful for Battery ?

To my understanding isn't the battery charge is OFF when it reached to 100% - So it is safe ? Right ?

My PC DAC usage 90% Time and OTG Mobile DAC 10% Time.

My advice.... Stop worrying about battery life. Sooner or later it gonna die anyway and before it happen you might longing to buy E24k

 

[Ab10]

Well - What is E24k ? Is it a new amp/dac from Fiio ?

 

[wuicho]

Will you guys think this AMP/DAC will drive good enough my HE400i, i'm using a Mac as a main Source. I read this headphones are hard to drive at low impedance and are very current hunger. My other option is to get the E12 that is more powerfull or maybe the Objective 2 and ditch the  DAC from now.

 

[Ab10]

  Will you guys think this AMP/DAC will drive good enough my HE400i, i'm using a Mac as a main Source. I read this headphones are hard to drive at low impedance and are very current hunger. My other option is to get the E12 that is more powerfull or maybe the Objective 2 and ditch the  DAC from now.

 
35 ohm can be handle quite easily by this AMP/DAC - No Problem.

 

[Brooko]

E17K review posted  - http://www.head-fi.org/products/fiio-e17k-alpen-2-usb-dac-headphone-amplifier/reviews/15014

 

[tuna47]

HELP

Can they be used with an iPhone or iPad with lightning port

 

[Ab10]

HELP

Can they be used with an iPhone or iPad with lightning port

 
Yes.....
 
I have iPad 4 (64GB) Wi-Fi version and I use Apple 'Lightning To USB Camera Adapter' cable Model no :- MD821ZM/A to connect the E17k as USB OTG DAC.
 
I Don't own any other iDevice at the moment so can't comment on those, but I read after iOS 9 implementation all iOS device compatible with this cable....so theoretically this cable work with iPhone/iPod too - But check before order or wait someone can confirm.   

 

[samu]

HELP

Can they be used with an iPhone or iPad with lightning port

Through Ligtning Port? I'm not sure with that (since I don't use Iphone).
You need to check with @JamesFiiO for that. Normally if you can find specific cable from FiiO which convert usb mini to lightning, I think it might work. 
Even if it doesn't work, you can always use it as an amp.

 

[tuna47]

Thanks guys

 

[mrlobaloba]

How does it match with Sennheiser HD-598 SE, I have heard in an old thread that the previous version (E17) didn't sound good enough with the HD-598.

 

[niakapa]

I got this dac/amp and am using it with Sennheiser 558's. I don't hear any difference using it on either my Macbook Pro (2015) or my Mac Pro (2014), with Audirvana playing uncompressed aiff files. (Well-recorded classical music.) 
 
I realize that the 558s are considered easy to drive, so this is a comment more about the dac quality compared to top of line Apple products.
 
My normal stereo is somewhat audiophile (Audio-gd electronics, open baffle speakers), and have many years of audiophile tweaking experience.
 
Just posting this for others who may be considering this Fiio unit. 

 

[villur]

So I thought I was ordering the alpen 1 for my DT990 Pros(250ohm) and what i actially received was the alpen 2(the website has alpen1 pictures, alpen1 specs and nowhere do they write alpen2).
Anyway, since the alpen2s seem to go only up to 150 ohm opposed to the alpen1 300ohms what do you guys think i should do, send it back immediately and look for something else or stick with the alpen2? Im kinda scared to even turn them on, maybe they wont accept it back.