[stavrosrhcp]

I am looking for an amp to increase my SRH840s' bass impact and thump. I always listen to music with iTunes, but even with the iTunes equalizer's bass boost, the sound isn't as bassy as I'd like. As you might understand from the title, I don't want to spend a lot, 50-60 euros maximum. I was about to get the FiiO E11K, but, shortly after, I read a review on head-fi saying that they reduce  the soundstage and I surely wouldnt want that.. So, in short, I want to get an amp that improves the bass but doesn't decrease the quality of my headphones' sound. Also, an amp that also improves the soundstage(even by little) is surely welcome as long as it doesn't exceed the budget I mentioned

 

[TrollDragon]

I doubt you will find any amplifier other than a DigiZoid that will give you a bass thump in a headphone that is not known for it's bass quantity. The ZO amp from DigiZoid is quite a bit above your budget. http://www.digizoid.com/
 
I would suggest looking for different headphones for your bass needs.