What about frequency response?
1381045
The frequency response seems to be on the flat side with out too much colorization, Lows are deep with out being muddy, and highs are clear and bright with out being harsh, the only lacking part for me was the midrange was a little laid back, and often you will see this in Monitor headphones and speakers, my reference sound comes from my Magnepan speakers with a Carver Lightstar amp, giving me what my head calls normal (yours may very)  ....what signature sound I am looking for in headphones may come easily with a headphone amp as I use these on my computer and am going to buy the Audioengine D1To get a better performance from and should make these headphone much more to my liking - I hope that helps. The frequency response seems to be on the flat side with out too much colorization, Lows are deep with out being muddy, and highs are clear and bright with out being harsh, the only lacking part for me was the midrange was a little laid back, and often you will see this in Monitor headphones and speakers, my reference sound comes from my Magnepan speakers with a Carver Lightstar amp, giving me what my head calls normal (yours may very)  ....what signature sound I am looking for in headphones may come easily with a headphone amp as I use these on my computer and am going to buy the... » Read More The frequency response seems to be on the flat side with out too much colorization, Lows are deep with out being muddy, and highs are clear and bright with out being harsh, the only lacking part for me was the midrange was a little laid back, and often you will see this in Monitor headphones and speakers, my reference sound comes from my Magnepan speakers with a Carver Lightstar amp, giving me what my head calls normal (yours may very)  ....what signature sound I am looking for in headphones may come easily with a headphone amp as I use these on my computer and am going to buy the Audioengine D1To get a better performance from and should make these headphone much more to my liking - I hope that helps. « Show Less
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
1381047
I purchased these headphones due to losing my hearing completely in my left ear, hence the Mono requirement. As to the frequency response, the sound is fine, all the high notes are there. Only drawback is that the actual mechanism is noisy if you move.
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.
650327
In theory, 0Mhz (DC) due to it up converts everything up to 125Mhz. Reality is going to be very-very low, like 50 - 100Khz. Probably won't be the most sensitive at these low frequencies.
2259220
It displays the input frequency graph in real time. So if there is a very high note, at a high output level, you will see that on the graph. Likewise for the rest of the spectrum. It looks similar to what you might see using audio programs like foobar, and such, on your PC. Basically a spectral display of what the input audio is, in relation to frequency vs. total quantity per frequency range. It appears to be based on the input purely, like most EQ's, so it's more of a pretty picture than something you would use purely for tuning your soundstage. For that, a proper SPL meter, and tone CD designed for setting up an EQ, is necessary. The old fashioned way still works the best. EQ's like this use it for more of a light show, and fancy looking effect, though it could be useful if you don't have the mentioned tools, and want to tweak your sound by ear. I could post a short video of it in action, but downloading a free copy of foobar, and looking at the EQ option, would give you a similar idea of what to expect. It basically just shows the input frequency amplitude based on the HZ, or kHZ range.
267737
It's not a matter of signal levels, which can be too low from many pickups. The frequency response is deliberately warped on records to decrease bass and increase playing time, and a phono pre-amp is used to precisely invert this pre-emphasis so the net result is an accurate and flat frequency response. So the short answer is: a phono pre-amp is absolutely necessary, always.
1368275
Dear W. D. BallThanks you choose our products firstThis item would be sent at random,but if you want to the different frequencies,just tell us we will send you what you want.Any other request pls feel free to contact usRegards Joy
885984
Hertz vs Watts would be something you want to google. I don't know the answer.
2229179
Frequency response is not for a modrange speraker, it is designed for low frequencies. I suggest to buy a midrange speaker designed for frequencies from 1Khz to 3Khz.
836609
Marc, why did you answer a question about frequency range by stating where you bought lights? No one has answered the original question and it is very basic information.
791328
The frequency balance is good, 30 Hz I don't know. Remember, you get what you pay for. I like these speakers a lot.
148064
The speaker has a 1700hz high frequency cross over. Not much response below that range. That would be classified as mid-range frequency. Most center channel application is voice range and above
340846
Thank all for your responses. The unit is useless for me as I need to know the AVERAGE sound level over a period of time.
1351146
These headphones have a flat frequency response across the audio spectrum, which is why I purchased them. Music as it was recorded. If you are trying to emphasize the lower frequencies I would try something else.
996797
I don't use devices which allow my making that comparison, however just listening, I'm satisfied. The frequency response seems flat with no noticeable distortion. I don't feel I'm compromising sound for convenience.
144571
The long answer starts here... http://en.wikipedia.org/wiki/Radio_frequency
340992
This mini sound level meters comes with 31.5Hz ~ 8KHz frequencey range and 40~130dB, and A frequency Weighting. Hope this information is helpful to you.
1054945
Impedance 8 ohms: Sensitivity 85 +- 3db: Power Handling 20 - 100 watts: Frequency Response 130Hz to 20,000Hz
1763901
Hello Stu, I'm not sure I understand your question, but if you are referring to the response time of the keys... it's instantaneous because the action is electronic as compared to a mechanical action produced by a standard piano.I hope this answers your question! Ken Getsinger