IMHO - There is nothing wrong with adding EQ if it makes things sound better.
For even $10 headphones
https://www.amazon.com/gp/product/B00NJ2M33I/?
Add EQ, and it's a world of difference - see:
$9 Headphone Review: Sony MDR-ZX110
"Conclusions
When I picked up this headphone randomly to test last night, I did not have high hopes for it at all. Cheap price and cheap feeling headphone. Can't be a good combination. Without equalization, it may be better than other junk headphones but otherwise, nothing I would use or recommend. But EQ this headphone and it produces reference quality sound! Yes, I know there will be riots in streets over this statement. But try it: it costs the same as a fast food meal.
What's that? You don't use EQ? Well, I don't want to hear. Actually, I don't even want to know you! You are wasting away your audiophile life without it. For zero cost you can transform a $9 headphone to a reference quality reproduction engine and you still don't want to go there? If so, I have nothing for you!
If you are not into headphones but want to know what the fuss is about for no money, buy this $9 headphone and put in my EQ. If you don't fall off your chair with excitement and get your pants wet with drool, I will come over and cancel out your audiophile credentials myself!
Needless to say, I highly recommend the Sony MDR-ZX110 headphone. Without EQ, it is acceptable but nothing I would rave about."
For even $10 headphones
https://www.amazon.com/gp/product/B00NJ2M33I/?
Add EQ, and it's a world of difference - see:
$9 Headphone Review: Sony MDR-ZX110
"Conclusions
When I picked up this headphone randomly to test last night, I did not have high hopes for it at all. Cheap price and cheap feeling headphone. Can't be a good combination. Without equalization, it may be better than other junk headphones but otherwise, nothing I would use or recommend. But EQ this headphone and it produces reference quality sound! Yes, I know there will be riots in streets over this statement. But try it: it costs the same as a fast food meal.
What's that? You don't use EQ? Well, I don't want to hear. Actually, I don't even want to know you! You are wasting away your audiophile life without it. For zero cost you can transform a $9 headphone to a reference quality reproduction engine and you still don't want to go there? If so, I have nothing for you!
If you are not into headphones but want to know what the fuss is about for no money, buy this $9 headphone and put in my EQ. If you don't fall off your chair with excitement and get your pants wet with drool, I will come over and cancel out your audiophile credentials myself!
Needless to say, I highly recommend the Sony MDR-ZX110 headphone. Without EQ, it is acceptable but nothing I would rave about."
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