Glad to hear you are enjoying the T70p! It is a truly impressive headphone. I am looking forward to read more impressions
I decided to go with the Fiio E07K. I'm very curious how the combo will sound and I hope the DAC OTG functionality works with my HTC One m8.
I will post a review later this week, I'm a tad too busy atm.
But this headphone keeps amazing me, especially when driven right. Been goofing around with Viper4android a bit, with the T70p presets, and it does make for a decent improvement of the way the HTC drives the Beyers.
But I have to experiment a bit more.
I've tried them with my old GoVibe v5 the other day, and while improved, the sound was a tad too bright. It seemed as if the GoVibe couldn't drive the low-end of the T70p with authority.
EDIT: short update
Okay, I've bought an extension cable so I can use em with my Denon DCD1500ae on the couch. I must start by stating that I have no idea how the headphone output stage of the Denon compares to an average headphone amplifier.
But I can't seem to understand the 'too little low-end' claims. Sure, when I'm driving them straight out of my HTC they're a tad bright and perhaps lean on the low-end (I find them reasonably balanced).
But when I'm using them directly from the Denon DCD they sound amazing. The clarity is awesome and the base is impressive. It's really nicely textured and incredibly layered. It never sounds lacking in the low-end of the spectrum, and when called for, it can even sound like a (good quality) subwoofer is on your head. On some track the earpads even showed some slight 'rumbling'.
All in all, it really is like putting a magnifying glass over your music. And I LOVE it.
Regards,
Ric.