Summary: I found that I had to constantly adjust these to get a consistent sound, and doing so stopped me getting into the music. Because of this I sold them quickly. They sound similar to Etymotic ER6i, with perhaps better bass. I'm not sure if they distorted treble slightly.
Basically, unless you get them dirt cheap or love the looks, there's real earphones to be bought instead.
Summary: When I received these earbuds I was not expecting much. I read reviews on the FX1X and FX3X, and both were laced with caveats. The few posts I found on the 101s said (more or less) that they were the least riddled with problems from the XX product line. In the end, I purchased them on a whim to have a pair of "fun" iems.
The packaging is a royal pain to open. It's nigh upon bulletproof. The cable feels cheap, but has acceptable levels of microphonics.
Pros: Fairly clean bass, break in time repairs sound hiccups, low price.
Summary: I purchased these headphones because some other Head-Fi-ers recommended them to me. And the community is now 2 for 2 in recommendations for me! These are some pretty serious little earbuds. They pack quite a hefty punch, especially for the price, just 17 bucks! I have owned several full size, bass heavy headphones, and these can stand up with the best of them. Honestly, they sound just as good as my Numark Red Waves, both in sound quality and bass.
Pros: Excellent bass, audio quality is surprisingly very good, best bang for your buck.
Cons: Very thin cable, cable catches movement noises, no EQ means some piercing highs.
Summary: Wow. What a value these are. Amazing clean punchy deep bass, great mids and sparkling highs(hot almost) all for $14. Without any eq the bass is just darn powerful. Not muddy, but deep, punchy and plenty of it. Turn on the bass booster and insanity happens. Overall bets basshead budget earphones I have heard. Can't go wrong. Love the slim 3.5mm jack also.
Summary: Headphones arrived on time and well packaged, they fit well and cancel about 90%+ off all outside noise plus there are three pairs of spare different sized buds. The headphones are worth the price you pay for. Performance wise they work with all the media players on my phone(galaxy s2) I found them to have quite more bass than expected with little or no mids and a fair bit of highs, all in all a good buy
Summary: First of all, I'm a sucker for headphones, especially red ones, so the fact that they are cheap and red is already a big plus for me. (I know, no logic). Anyhow, got them yesterday and they are currently playing Swedish House Mafia whilst I write this. First fortunate mistake I made was that I thought I was buying the HAFX1X ones and was disappointed that there is no case with these, but as it happens that these are an upgrade to the X1X's I'm not fussed about the lack...
Summary: I bought two pairs of this earphone for £20, as I was wishing to replace some Soundmagic earphones which cost £30 and broke within 2 weeks. Out of the box, the Xtreme Xplosives sound more than acceptable - they are fun and revealing, with huge bass response and good soundstage. Over time they burn in a little and sound better, with the high end becomming a bit more tame.