Treble is a bit different between the two - GR07 has a bit more sparkle and is a bit brighter in direct comparison (at least for me anyway). Other than that, they'd be perfect for him it sounds
dam it i knew it! from reading the threads and reviews it sounded like it! i just couldn't justify spending that much for an iem! especially one without detachable cables (i can see one day something tugs on it and then it cuts out) i dunno how to recable or who in toronto that would recable it for me
the re400s for me was a very very very cautious purchase after hearing about the cable issue and durablity (i paid 119 before tax for them at a shop here in toronto) plus a 1 year warranty. (plus it was the only place i could demo it)
i think some of the bass issue and the treble got resolved, at least some, i think the gr07 is still probably perfect for me (i was hesitant to try the sony hybrids on them, even though i have a lot lying around) i was afraid of losing the detail and the transperant sound of the re400s that makes it so fantastic
i was listening to them for what like 4 hours today at school while doing project, and after a while i felt that the highs started to fatigue my ears, i had to take a break for a while afterwards. their not harsh, like the s4s this was just maybe because i was listening to long and the sound is very lean
after some listening now A/Bing the stock biflange and the sony hybrids (orange), a lot of the detail is still there, the sound got a bit thicker, bass got slight bump and the treble i dunno how to describe it, stronger, emphasized?? its not as airy as before, but maybe just a little faster?
my guess is probably the combination of the silicone plus the narrower opening on the sony hybrids warming up the sound a bit ( i could use the extra little bass while commuting anyway)
for now i'll stick with this and see how i like it in the long haul,
what tips do you guys use?
on the off note, i put the re400 biflange on my monster turbines (it toned down the bass,it had a bit too much for me to begin with) and i suspect open the upper midrange and lower treble) maybe thats why its more airy, female vocals is definitely more intoxicating now. haha
win win?? =0