I have just get my ACS custom sleeves on my IE80.
I own these IEMs for a year, upgraded from IE7. I have silver upgrade cable, and tape mod.
None of the factory tips could give me perfect isolation, (interesting, with IE7 I could get it) so I used Comply foam tips for a while. I pretty much liked them, but one pair did not last longer than 2 weeks, and in this case it is a bit expensive...
So I started to think, what the best option would be... Sell my IE80, and buy SE535? Different style with its triple drive... I read a lot of comparative reviews... SE535 is more analytic, requires more power to drive, more unforgivable with poor quality source or record... IE80 is more like live music on its own... Not that analytic, but more like reality... With still nice clarity, and detail, not to mention the wide soundstage, which I like...
I decided, my budget shouldnt really be over 300 pounds. (I wish I could try and have IE800, or some custom IEM around 1000 pounds, but no budget for that yet.)
So in my price range basically the two options were the two mentioned IEMs.
Cut a long story short, I decided to invest into custom sleeves for IE80, instead of buying SE535.
My experience with custom sleeves:
Compared to comply tips, isolation improved about 20-30%. Also it sounds much clearer, even more detailed. I had to reduce my bass settings on my source. (My bass knob on the IE80 is set to 20-30%.)
Sounds more opened, than with comply...
Not to mention the easier put in, take out process, and the fact, I dont have to buy comply tips ever again, ACS silicon lasts for longer...
So I think, it worthed the price. For 348 pounds (190 IE80, 50 silver cable, 108 custom sleeves, and tape mod) I have a decent sounding IEM.
Of course, you can get better sounding. But I think, only for much more money...
Another thing, the source:
IE80 can be driven quite easily. I have Cowon C2 (same sound quality than J3) this is enough for me.
I think, no mobile phone can give the same quality. (incliding iphones, and htc, samsung flagships).
So my question is, does it worth to invest into a better source than C2 in your opinion?