I recently bought the Shure750dj's (as I had been planning for a month or so) for a very reasonable $108, with a little cash left over. Now I am interested in buying an amplifier, because I find that less on my PC, but especially on my iPod, the headphones really do lack that power needed, and my listening unless it is in a perfectly quiet area is almost always above the 40% mark, sometimes up to 70%. I find the music a little too faded that I notice is not as much the case while using my PC with these headphones plugged in. I don't like this because I care about the safety of my ears, and what I was hoping is that an amp would give more clarity to the music, so I don't strain my ears trying to hear the finer quality details by turning the volume up too high. I've gotten about 40 hours of burn-in on these headphones, so I'm not sure if I should keep going or just listen to them and have it settle out eventually.
Anyways, I was looking for an amp under the $40 mark, but my main concern is: Will this make much of a difference? Would I be able to say it was WORTH $40? Mind you, the headphones were only $108, so I see no reason in paying anything about half the price of them, just because it goes against my ethics of reasonable spending lol. Most say it only makes a "little" difference with these headphones, so I'm unsure as to whether to invest or not. I saw the FiiO E5, but I'm not too sure how good it is, and I figured you would know best about amplifiers.
On a side note, my dad bought this... I believe... amplifier... a while ago. The model says Denon DRA-425R. Now I have no experience with amplifiers, but I do know that if I were to take this upstairs and plop it on my desk not only would it take up a lot of space, but my parents use it to control the stereo system in the house so I doubt I could use it. I was just wondering if this could be a POSSIBLE alternative. Sorry for the long post :P