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i have been on amazon and was looking at the dt990s and was wondering what does the different ohm levels have to with performance and if one sounds better than the other (low ohm or high ohm). That being said how are the mmx 300 compared to the dt990. i like a seep base but dont want it to be over powering while gaming online but would like to have a deep base for the campaign and movies and music if that makes sense.blazer7932The higher the impedance (ohm) the more power it takes to drive the headphones properly, if you don't have a sound card with a good headphone amplifier or a separate one even, you want to go for a low impedance (<80 ohm to give a rough number). You might read claims that a higher impedance means better sound, since there's more loops in the coils that move the driver and whatnot, thus giving better control and response, but it's far more important to match the impedance with the rest of your gear (as in, what you plug the headphones into). Since the MMX300 basically is a DT-770 there are a few notable differences when compared to the DT-990. The 990's are open meaning they leak sound in and out, 770's are closed and isolate somewhat well. Both have a somewhat emphasized bass, but you're going to feel more impact with the 770's since they're closed. This is a preference thing though, I prefer the bass that comes from open headphones since I think it sounds more natural. The 990's also have quite emphasized treble so they're pretty bright in their sound. This makes everything sound quite sparkly and clear, but can be fatiguing for some. I have had the 990's myself and while the sound overall is very nice I found them a bit too sibilant with some music, I'm sensitive to it though. If you haven't got treble sensitive ears the 990's are great for both gaming and music, and the bass is indeed deep without being overpowering.
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