JVC HA-FX101

General Information

Inner-ear headphones that reproduce powerful bass sound by Extreme Deep Bass Ports and 8.5mm neodymium driver units

Extreme Deep Bass Ports and 8.5mm neodymium driver units deliver ultimate bass sound
Rubber protectors for body durability
Superior sound isolation
Comfortable fit with ergonomic contoured form
3.94f4 (1.2m) cord with gold plated iPhone compatible slim plug

Latest reviews

Pros: Punchy tight bass; acceptable treble; lightweight
Cons: Dirty sibilant highs; insufficient lower midrange
Too much dirt and sibilance at 5.5-6.5KHz. Also they are not so murderous about bass as many people suggest.
 
Characteristics (subjective, 10 max):
Resolution: .............................6
Transparency: .........................5
Frequency range: ...................7.5
 
Balance (5 means equal):
High relative to mid: ................6.5
Low relative to mid: ................6.8
 
Frequency accentuation brakedown:
Bass is more: ........................middle
Mids are more: ......................high
Highs are more: .....................middle
 
Qualitative characteristics:
Bass tightness.......................7.9
Highs smoothness..................5.7
Pros: Good bass, very comfortable and lightweight.
Cons: Requires a good burn in, poor build quality.
The bass is very good for the price and the driver size. The sound however, could be improved further by equalization. The highs are suprisingly good but these headphones are lacking a bit of the mids. These headphones are very lightweight and comfortable, allowing up to long hours of use.

However, I can still remember the time I took these headphones out of the box, they sounded awful. Literally awful. The bass sounded distorted, the mids are non existent and the highs sounded so bad that my ears hurt. I decided to give them a burn in for around 24 hours and oh my god the sound changed so much. The bass sounded much clearer and punchy, I can finally hear some mids and the treble doesn't try to make me go deaf anymore. As it turns out, after around 48 hours of burn in, these pair of headphpnes sound pretty phenomenal fpr their price.

Sadly, having a good burn in isn't the biggest con that might actually hold you back from purchasing these decent pair of headphones. The biggest con is indeed related to how poorly built these headphones are. Made out of plastic, they are very lightweight but sadly they are not very robust, even they do look like they are. After a few months of listening, I started to hear static in my music which at first I thought it was my PC's headphone jack's issue but as it turns out it's the headphones. I still use them sometimes but the static is just irritating and it ruins my listening expetience in a way.

As a conclusion, if you are someone who listens to dubstep, EDM or anything bassy, and is going on a tight budget and wants something that looks cool and "expensive", these are what you might be looking for. However, if your budget is a bit looser, I would recommend that you go with the FX1X instead. The sound is better and so is the build quality and I would definetly suggest ypu taking a look at that first.
JK1
JK1
The HAFX1X is huge and I had fit problem with it. I suggest passing on both of these, as the sound quality isn't so good on either, and the bass sounds unnatural on both. If you want extreme unnatural amounts of bass, then get the $12 Soundmagic ES18, and boost the bass on your player's equilizer by around 12db. I usually use the ES18 with the equilizer on my player off, however I just tried it with a 12db bass boost using Rockbox. 
caponsacchi
caponsacchi
For quite some time the JVC "Marshmallows" were among the most popular inexpensive phones on the market. With their foam tips and acceptable sound, they were viewed by many (including me) as great "rough and tumble" phones for everyday casual use.  These current JVC phones (with the squared edges and silicone tips) appear to be aimed at a market similar to the "Marshmallow" buyer.  (If they're as comfortable and the sound no worse than the Marshmallows, count me in. What's best avoided, imo, is the company's entry level models with the "Gumy Bear" designation. The cables are mere threads, easily broken while I was trying to disentangle them.)
Pros: Extremely good for the price, great for amateur bassheads, look better than average
Cons: Build Quality
I had the FX101s for a short period of time and I was really enjoying them. That was until something went wrong in the left earbud. Most say its a cable connection fault. No matter what, build quality is a cause for concern in these, especially the cable. The plastic body although makes them light, also makes them more susceptible to damage. Since they were gone I got the JVC FX1X instead. A WORLD OF DIFFERENCE. Much more refined sound, even punchier bass and way better build. If planning to get the 101s please do consider the 1Xs as well. But if you are new to earphones, the 101s remain my recommendation. 
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JK1
JK1
I have both the HAFX1x and HAFX101. I don't use these anymore, as the sound quality is not so good. I have trouble getting a good fit with the HAFX1x, while the HAFX101 fits much better. The bass on these does not sound natural, and overall sound quality is poor. 
 
If you don't mind extra treble, the JVC HAFX40 has much better sound overall, although it hurts my ears with some music, as I am a bit treble sensitive. Otherwise I like the detailed sound very much. It also has good bass. 
 
For strong bass that sounds natural, I love my Sony MDREX210. It has 13.5 mm drivers.
I also like the Panasonic RPHJE450 for its nice bass and great fit, althout it seems to be lacking slightly in detail, especially when compared to the Panasonic RPHJE355 or JVCHAFX40, The HAS355 is a bit bass deficient though.

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