[Me x3]

Wow. You said everything i need!! I'm so thankful to you!. ( sorry about my english, i'm mexican) definitively i will buy the k702. Hope they wilö work well with the fiio e10...

No prob! I'm from Argentina.
I've used my K702 with a FiiO E10 for month in the past, it works quite well. Unless you want to listen to music at VERY loud levels which is not that healthy anyway.
K702 will scale with even better DACs and Amp, so it's also a good investment in the long run.
 
Suerte y saludos!

 

[Me x3]

 

[Synthax]

K612 is less resolving, although slightly warmer and more forgiving than K702. A more 'musical' less technical version I would say.
K702 is a neutralish headphone with detailed treble and forward mids. It's a very good reference headphone with big soundstage.
K712 is very similar to K702 but has different pads for a warmer and more intimate sound. It's still very resolving and has more focused imaging than K702.
Side by side the K712 appears a tad darker than K702 and has slightly smaller soundstage.

These three headphones need quality DAC and headphone amp to shine.

What do you think guys, will k702 with k712 gel pads sound like k712?

 

[Me x3]

What do you think guys, will k702 with k712 gel pads sound like k712?

A very recent (somehow warmer) K702 with K712 pads should sound very similar to K712.
At least in terms of sound signature / frequency response. Look for s/n over 129.xxx
 
I had an earlier K702 s/n 102.xxx and it was drier and more nasal sounding, this with K712 pads won't sound like (my) K712.
 
Without having 10 units of each model is hard to take unit to unit variation aside.
Based on what I've seen and experienced, earlier K702 was closer to the original K701 while the most recent units are fuller sounding overall.