Hmm... wow! Really interesting find there, CT. I really wish Nick would just make an amp-only device with the power of the 6S in a smaller form factor, or a more powerful amp in a similar form factor (not necessarily more mW output). Has anyone asked him if he would make something like that in the future? If not, I'll send him a message.

Power use. 4627 cuts battery life 4x, they both sound excellent and both are reasonably resilient to GSM noise. I'm actually considering making my own portable amp/dac/pmp instead... Will be based on QRV-08 or QRV-09, except without the huge power supply (instead a smaller footprint Cuk converter) and with switchable gain.

I've been a fan of Nick's Leckerton amps for awhile and like to think a few people here and there got to enjoy the same sound I was hearing from them.  That being said, the 760 is something of a miss for me compared to the 6Smk2

Leckerton 760 impressions:
-rougher, less clear and resolving on high gain.  Low gain sounds closer to 6Smk2 w/ same opamps (4627 BRZ).  Digital pot definitely throwing away bits contributing to the mp3 effect.  Seems folks are having issues w/ digital volume control on some of these newer portables these days.
-DAC is a bit clearer, but the hit to the analog section from the digital pot is an overall downgrade unless you like the sound of mp3s.  The opening strums on Hotel California are just a mess by comparison to the 6Smk2.

I would only consider the 760 for it's feature set, not as a sonic upgrade over the 6S. Then only if you use low gain w/ IEMs and listen more on the loud side.  Usually most portable amps perform better sonically at high gain, however the 760 is the opposite preferring low gain.  Even then, the 6Smk2 outshines it at the Nth degree with similar opamps in my opinion.

Thanks for ruining my resale