Pros: durable, comfort, economic,
Cons: not warm !
I bought this stuff in online market.
And seller emphasized "WARM SOUND".
But my opinion is different. Warm? no, it's cold.
Compare with UE600 and this, you will know what I mean.
A151 has not enough bass to make sound going to warmmy
twisted cable and durable housing is good for price.
design is not a sense.
housing is little bit bigger than other BA transducer IEMs.