If I was using this with consumer headphones, I would just rate it 5 stars. It has a nice design, good battery life, quality aluminium enclosure, comes with several cables, power button 3 stage-eq, three different clips to attach it to your clothes, volume control and lastly it boosts your volume.

EQ
It's nearly useless. Makes the sound slow and bloated. I loved the flashing light and smooth buttons. I bet it is good on some bass light headphones, like Superlux HD668 though. It may also work differently on headphones with different impedances.

SQ
Bass: Lacks authority
Midrange: I feel there is a bit of distortion lurking somewhere.
Highs: Slightly glossy

accuracy, coherency, timing, all that stuff is lacking, maybe because of the digital volume control.


TLDR; I wanted to like it, but it didn't manage to sound good enough. (Not with 80ohm DT770's that I reviewed them with) You could have different result with easier to drive headphones. I really hope FiiO tries to improve the sound quality, because it is already very promising. Maybe another version with just a gain switch instead of volume control.

Pioneer SE-CL711-K is a headphone with a _slight emphasis on bass frequencies.

The Behringer UFO202 is the cheapest manufactured DA you can buy. It is free from computer noise. The headphone output is mediocre, but the RCA outs slightly better.


Verdict: psychoacoustical performance is poor. The device has a plastic feel to it.

Great in-ear for people who like to listen to modern music. Extended bass rsepone.

They play music. Sound quality is mediocre. Fit and build quality is awful.

BeyerdynaMIC DT100 is a studio oriented headphone and not recommended for general music listening.

Vintage headphones AKG K240 600ohm, would buy again.

For the price of one headphone, you get a nice bass and a very nicely finished product. I would call this a good value!
 
Sound is bordering on average, due to slightly exaggarated bass response. (OK so they thump like hell you get the idea)
 
Half of the review got deleted in a car accident. sry

The K44 Perception headphones include comfortable leatherette ear pads and a self-adjusting headband that allow extended wear without discomfort. They come with a 2.5m (8ft), fixed, straight cable including convertible jack plug.
 
Sound has little bit of headcup resonance. Too much low-mids. Bass and treble not extended.

Sound:


 

AKG sound quality. The bass goes very low (30hz sine-wave still going strong). Small headcups leave them sounding a bit muffled in the soundstage.




 


Design:


They have a very cool folding design indeed!


 


Overall:


Offering a value for the price

They look like a cheap version of AKG K240, but the drivers are made by Superlux and sound very different.
 
SQ:
These drivers have this good detail retrieval, that makes them good value despite their treble distortion or brightness. I would like a bit more bass.
 
Edit: These headphones have a newer EVO model, which has much extended bass response.