Roughly I'd agree. It won't be "worlds apart" - the Denons are super efficient and low impedance; a first generation Game Boy can take them to ear-splitting levels with ease. I am not exaggerating.
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Bass will sound best out of a competent amp, but personally I don't think it'll change as drastically as some people claim on here assuming the output impedance isn't an issue (since that has an issue with the damping factor which will have an impact on bass, as well as the frequency response issues).
An outboard DAC will not matter one bit. It will not change one thing you have complained about. An amplifier will give you more power, which will let you take things louder. It sounds like you're listening to these at absurd volumes (you state wanting them to "rattle" - that's a very bad day with something like the Denons; that requires incredibly high output, these are not cheap plastic toys that rattle and pop with normal input - I think perhaps you're too used to cheap headphones).
These *are* closed headphones, but they do not provide a lot of isolation. Truly open headphones are worlds apart. There are closed headphones that offer more isolation, I would suggest Beyerdynamic or Sennheiser if this is what you want.
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I loved the sound on my iPhone, but I went ahead and bought an E10 for my computer. I was using onboard sound with no amp, I figure getting a DAC/AMP should fix my problem. The only thing I'm disappointed in regarding the headphones is that I thought it was closed.. these aren't that closed at all. Good sound though.
I agree here.
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These cans don't need Amp'd at all... sure a good DAC will help... but only to an extent. If you are that unsatisfied right now then I doubt spending $100 is really going to solve the problem. An amp surely would help, but only to a lesser extent than the pure sound coming out of the cans from any source.
I have the Essence STX (DAC/headphone AMP combo) and I don't notice a night and day difference between onboard and soundcard. Just a heads up. Not saying there isn't a difference, but yeah...
The D2000 definitely has more bass than the M50. It is an all around better headphone for sure.
I can flap my arms and insist that I'm able to take flight, and a lot of people can agree; it won't make it happen. An outboard DAC will do nothing for you, a soundcard may or may not (soundcards are more complicated; although I'm sure terms have been so conflated here that picking things back apart would be...sticky). Regarding why the iPhone works better, my suspicion is that something is set-up wrong. Again, even with garbage sources, these can get incredibly loud. It's hard to answer "better" when you're not providing us much detail. What do you mean by "there's so much noise" - what kind of noise? What isn't to your liking? I'm not trying to attack you here, just trying to get more information, to give you a more square answer. The outboard hardware may very well be addressing a problem (more likely, it's side-stepping a problem, but in doing so it will be heralded as a solution), or it may just be throwing good money after bad. Hard to say with so little information. Regarding your complaints about the sound:
- No soundcard, DAC, cable, whatever, will change the isolation, fit, or soundstage of a headphone.
- No DAC will change the output level or other characteristics (this is said with a lot of qualifications, but basically my point is, you can't fix the headphone by dumping money into up-stream components).
If you want something that can produce a silly amount of bass, provide a lot of isolation, and look half-decent doing it, look at the Ultrasone PRO models (like the PRO900) or the Sony MDR-XB1000. Both should be more in-line with addressing what you described as "flaws" in your first post.
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I already bought the E10 though. I've been told from everyone that onboard sound isn't as good as having a soundcard or DAC.. and it makes sense to me. Why is the quality of my iPhone so much better than my computer soundwise?
In BF3 there's just so much noise I can't really distinguish between stuff. I hope this gets better with the E10..