I've been enjoying my S:flo2 -> Leckerton UHA-4 -> Etymotics ER-4S with custom mold for a couple of years now. I am very happy with this rig.
Anyway since these days most of my listening is on the go I am considering to improve the rig... you know that typical upgrade itch...
In the following I will concentrate of what I would love to improve: do not consider the criticism out of the context of general appreciation for this rig.
A) the source
for me the S:flo2 issues are in order:
1) no gapless playback
2) no aac support
3) no 24/94 flac
4) terrible touch interface, no hold button
my ideal source might even lack DAC and just provide digital out.
If a DAC is included, then it would be nice to be able to use it as USB DAC, lineout is almost mandatory, digital out would be nice anyway.
B) the AMP
On general ground I would not favor an additional amp for portability reasons, anyway the S:flo2 Headphone Out had a lot of interferences from my Blackberry phone. The Leckerton UHA-4 was a perfect cure, and I could use it as USB DAC whenever I have been sitting in front of a PC.
Too bad I could not use its DAC with S:flo2...
The UHA-4 is a very good amp, still if I could improve it I would fix the following:
1) no auto switch-off
2) no 24/96 and 24/88 when used as USB DAC
3) no iPad compatibility
Of course if the source would provide a great interference-free powerful HO I could do without the (DAC/)AMP.
C) the in-ear headphones
the only single problem I have with my ER-4S is their form factor:
1) they stick out of my ear in a way that makes impossible to wear them under a cap or in bed while resting on a pillow
2) a lot of cable microphonics: hard to wear them over-the-ears
3) non detachable/replaceable cables. It already happened to me the break a cable once
The custom mold is mandatory to gain extra isolation from the external ambient noise
Finally let me add that I listen to a lot of different stuff: mainly indie and classic rock, but also folk, acoustic, classical music, jazz
I look forward to suggestions
Edited by Nando1970 - 9/17/12 at 8:10am