Question 1

cna these be used with an ipad?

Accepted Answer

I would think they would, they come with a large plug converter down to the small plug. Which I removed to allow it to connect to a sound card on a personal computer (which is the same plug on the device you want to use it on).

The problem is going to be in amplification. These earphones have large diaphram speakers, which require a lot of power to be driven, or listened to. At least with any volume. You may be able to get the volume up to adequate listening, but it may require a lot of battery power, or pre-amplification. Thus using more of your battery, and not giving you much time to listen before you look for a recharge. This is one of the reasons smaller devices use ear buds, as they dont require much power to get smaller drivers to high volumes.

The other issue, and one I would think anyone using these earphones should be concerned with, is, the isolation of outside sounds. As I mentioned in my original review, these earphones insolate the listener so much, that, you really don't hear outside sounds, like warning horns, emergency alerts, etc... These earphones are far more a concern than ear buds when it comes to using them outdoors. Not so much the fact you can't get them so loud you can't hear the World around you, but that they insolate the listener more, even at lower volume levels.

Question 2

What features make the KOSS QZ-99 headphones suitable for noise reduction?

Accepted Answer

The KOSS QZ-99 headphones feature closed Pneumalite ear cushions and an extra-secure headband that create a tight seal around the ear, eliminating all ambient noise. They also have neodymium magnet structures for outstanding clarity and definition.

Question 3

What is the frequency response range of the KOSS QZ-99 headphones?

Accepted Answer

The frequency response range of the KOSS QZ-99 headphones is 40Hz to 20KHz.

Questions & Answers