[Damon88]

I would like to ask how would u rate the improvement in sound quality after upgrading your stock IEM that came with Sony NWZ series
 
Mine is NWZ A844 that came with MDR NC33 (noise cancelling)
 
Lets say one upgrades to MEElecs M6 or MEElecs SP51 or NuSphere 700x or perhaps CX300 or Thinksound ts0  IEM's like that
 
If the Stock IEMS were  50 in the range of 1 - 100 How would u rate the improvement in new IEM's ???
 
 
 
1 -------------------------------------- 50 ------------------------------------------ 100
                                        Stock
                                         (Bass ,Mainly Low end)

 
 
1 -------------------------------------- 50 -------------------------------------------100
                                  Stock Audio Clarity
                                    (Mid/s and highs)

 
 
 
 

 

[s0lar]

Hard to tell, you should be the best person to hear the difference. Check some reviews here and there and choose your budget. Decide for yourself what kind of sound signature you like or think you will like and start listening.
There are several good budget IEMs/headphones around 50 USD.