No idea about Iphone 6. But i can confirm that Iphone X cannot work with E10k. No power to the DAC at all.
But my fren's phone was using a different converter. From DAC : micro usb to usb >usb to Apple 30-pin > Apple 30-pin to lightning.

For some reason , i tested on quite a few phones for E10k:
1. Iphone X - tak jalan
2. Huawei Mate 9 - tak jalan (even with the latest Android Oreo update)
3. Xiaomi Mi5 - jalan
4. Samsung Note 8 - jalan
5. One Plus 3T - jalan
6. Samsung A7 - jalan

All tested with a OTG adaptor with the provided usb cable.

How much power draw ? I dont hv an idea.

Want to ask about portable DAC/Amp .

I own an Ifi Nano Black Label.

I want to know if Chord Mojo is a significant upgrade over the Ifi unit ?

My cheap gears:
1. Sony MDR-1A
2. Superlux HD330
3. Beyerdynamic DT 770 250ohm
4. V-Moda Crossfade M-100
5. TFZ Exclusive 5

Thank you for your reply. Then i want to know why did you sell off your chord mojo and keep the nano bl ? Any shortcomings that i need to know ? For the amp section of the nano bl , to me it is just nice only. Not much headroom to spare though.

Need some recommendations. Recently I bought a used Schiit stack ( Modi 2U + Magni 2U ) . Good price though.

I'm very happy with the amp. Lots of power.
The DAC is very disappointing to me. Lack of resolution is the best to describe it.

I have another Ifi Nano Black IDSD, if I hook it via the Line out using a 3.5mm TRS to RCA cable to the Magni 2U, it sounds so much more detailed.

My question now is, should I get a Topping D50 and does it work well with my Magni 2U ?
And is it a significant improvement over the Modi 2U ?

I'm a Superlux HD330 owner here. This thing is 150ohms. No amp really make hamper its bass output and low volume. You need at least a cheap amp like a Fiio E10k also will do. Though bewarned, the stock earpad really crappy . It is cheaply made and too shallow for me. However, HD330 design share most of the stuff with Beyerdynamic DT770 ; earpads , headband can be interchangeable . So you can buy aftermarket earpad easily.

I have not tried both the headphones you mentioned. I have no idea what kind of sound signature you are looking, but HD330 is very musical type of headphone, not for monitoring definitely. Slight V shaped sound signature . The only complain I have with this thing is I wish the bass is tighter, but since this is a semi open back headphone, I have to live with that compromise. Sound stage is above average though.
But then if your neutral sounding means you are looking for those studio monitoring headphone, then I will tell you to buy the Samson SR850 for roughly the amount of price as the HD330