Koss PRO4AA Headphones: I notice the impedance is listed at 250 ohms.... high. can anyone tell me if this poses any problems when using the headphones with a PC as opposed to a regular stereo amp?
880533
I personally don't have any problems with using them with my PC, but since every PC is different at how they output sound it just depends on how much output your PC gives. This pair also doesn't need to be terribly loud since they have excellent sound isolation.
1977124
They have a low impedence of 32 ohms but have a sensitivity of 99db which is around 4db less than usual (which is huge in difference in db). If you listen loud, this isn't your headphone.
1543263
Appreciate your response, but not helpful. You directed to spec sheet for koss. I already have owned 3 sets of koss ksc75. I know what I like about the koss phones. Was wanting to hear from someone who had USED both headphones and would comment. Thanks anyway.
706723
Hi, this unit sounds amazing with my Sennheiser HD250 headphones, which are also rated at 300 ohms. It is an amazing piece of gear.
115865
It says right in the description for the unit "Headphones impedance between 16 ohm to 300 ohm are suitable for use with Icon uDAC-2".
1381048
Numerically, the FQ is 10-25,000 Hz. If you would like to see a graph that charts the headphone's FQ performance and compare it to other headphones, I refer you to headphone.com (http://www.headphone.com/headphones/koss-pro-dj-100.php). You will notice that the headphone has a significant drop in the 5k region. If you want my subjective impressions, I think the headphone is very balanced and "flat." I read a lot of people who claim that the bass response is lacking, but in my opinion, it is sufficiently present and natural. Personally, I think the 5k dip is more of an issue on some tracks. The frequency response in the higher regions is quite unstable.
2185919
This appears to be microphone level or at best line level inputs and outputs. Sadly the description doesn't say what the levels or impedances are, but the example in the text implies this. Headphones & speakers are very low impedance and much higher power (wattage) than mic or line levels, so I would be very surprised if you could heard anything, let along acceptable volume and tone, if you directly connect headphones, which would also require at least a mono/stereo adapter.
1615578
It's been a while since I used the Pro 24 - I have since gotten a Scarlett 8i - I needed the extra 2 inputs for my purposes. I used the 24 many times and did use headphones to listen to myself and and the input from my wife's piano to play with. Never had a problem with it. I am trying to remember if I had to go in to preferences and click on monitor incoming audio to do it. I am kind of thinking I did have to do something like that.
1748384
I have the 250 ohms as I drive them with a headphone amplifierso in short it depends what you plug them into ie Iphone which doesn`t have enough power to drivethe 250 ohms.For example "The 32 ohm model is a good option for those who wish to use this headphone while they are mobile or paired with devices such as laptops, iPods, MP3 players, tablets, etc"
291498
I'm afraid I can't say exactly how that particular Sennheiser will sound, and it doesn't really make sense to ask. But, it is the best headphone amp for the money, probably for 3 Times the money, and there is nothing odd about the ohm rating of the Sennheiser, so it's worth the purchase.
1814479
The limiting factor will the DAC (digital-to-analog-circuit) of the device you are using. You can have a pair of top-notch headphones, but if the DAC on the device is sub-par, then you will not get the sound quality potential out of the headphones. When I use these on my hacked Kindle, they sound great. Used with my Huawei phone, definite difference, even with use of the EQ. Also, these cans are 40ohm impedance. You might needs to consider a pair with a lower impedance rating (my MDR-X10's are 25ohm). Hope this helps!
1644859
IMO K612 are best for listen to pure music or as studio monitors. They are durable and should hold up to your application. DT 990 are also great audiophile or studio monitoring headphones. You should not have a problem. I don't see the need for a headphone amp. Be aware of which ohms you choose as this can affect volume.
1925336
This is only a 32Ohm unit and you maybe used to a 50Ohm unit ... so you maybe over driving the max output of the headphones. Mine are pretty loud and actually respond better on my mobile than others. I did notice a huge difference when I plugged them into a soundboard that I normally use 50Ohm headphones. (Your output device may not work well at 32Ohms.) But at the max volume when they start to distort is way too loud for me and I don't want to loose hearing.
1381046
Numerically, the FQ is 10-25,000 Hz.If you would like to see a graph that charts the headphone's FQ performance and compare it to other headphones, I refer you to headphone.com (http://www.headphone.com/headphones/koss-pro-dj-100.php). You will notice that the headphone has a significant drop in the 5k region.If you want my subjective impressions, I think the headphone is very balanced and "flat." I read a lot of people who claim that the bass response is lacking, but in my opinion, it is sufficiently present and natural. Personally, I think the 5k dip is more of an issue on some tracks. The frequency response in the higher regions is quite unstable. Numerically, the FQ is 10-25,000 Hz.If you would like to see a graph that charts the headphone's FQ performance and compare it to other headphones, I refer you to headphone.com (http://www.headphone.com/headphones/koss-pro-dj-100.php). You will notice that the headphone has a significant drop in the 5k region.If you want my subjective impressions, I think the headphone is very balanced and "flat." I read a lot of people who claim that the bass response is lacking, but in my opinion, it is sufficiently present and natural. Personally, I think the 5k dip... » Read More Numerically, the FQ is 10-25,000 Hz.If you would like to see a graph that charts the headphone's FQ performance and compare it to other headphones, I refer you to headphone.com (http://www.headphone.com/headphones/koss-pro-dj-100.php). You will notice that the headphone has a significant drop in the 5k region.If you want my subjective impressions, I think the headphone is very balanced and "flat." I read a lot of people who claim that the bass response is lacking, but in my opinion, it is sufficiently present and natural. Personally, I think the 5k dip is more of an issue on some tracks. The frequency response in the higher regions is quite unstable. « Show Less
797287
I have a samsung tablet and a pair of beyerdynamic dt770s which run at 250ohms. The amp is needed to drive them and it more than does the job. Totally different with them at such a cheap price. Actual sound is comparable to systems costing 5 to 10 times as much.
177319
The D2 output is 123mW at 32ohm and has 200ohm output impedance. The Schiit Magni output is 1.2watts at 32ohm and has approx. 1 to 2 ohm output impedance. At this low of output impedance and 1200mw output it should rock & roll almost any headphone, even Planar Magnetics. What headphones are you presently using? KP Jandt
1603431
Thanks for the replies. Will keep it in mind when I am ready to buy a headphone amp.