Average Reviews:
(More customer reviews)I disagree with two of the people who have nothing good to say about this equalizer, and understand that they may be expecting it to match the performance of extremely high quality audio equipment -- which won't need it anyway.
This equalizer is extremely useful if you are trying to listen to -- say -- tapes of old time radio, shortwave broadcasts, or noisy AM signals. You can reduce harshness, improve bass response, and reduce noise effects.
However, it does have some limitations, related to its low price. At $20 retail price, such a helpful and flexible gadget will not have perfect audio performance, and it doesn't. There is a SLIGHT hiss audible at all times, apparently intrinsic in the audio chip used for the headphone amp. The hiss is introduced after the volume control; it's there all the time. Depending on the input voltage of the device to which it's connected, the hiss can be as loud as -30 dB, or as soft as -50 dB or lower; and it is predominantly a very bright hissing. So extremely efficient, bright headphones may exaggerate it. I hope Koss improves this device in a future model; but for low fidelity source material, and with phones that are not extremely bright, the hiss introduced by this device is MUCH, much lower than the hiss intrinsic in a tape, radio broadcast, or old recording and will quickly be ignored. If, however, you are hooking this to a CD player to listen with excellent phones to wideband digital recordings, you'll notice the hiss -- and be annoyed, depending on your sensibilities.
I am glad I purchased one. My intended use was to listen to cassettes of old time radio shows. Many of the commercial tapes are not well corrected and sound extremely harsh and thin; this equalizer fixes that quite nicely. The bands are well chosen to have an aural effect where poor recordings have flaws.
For background: I am a retired audio engineer with three decades in broadcasting and recording, and an enthusiast of OTR and recordings of old classic performances of music from the fifties back to the twenties, many of which NEED help that this equalizer can provide.
Click Here to see more reviews about: Koss EQ50 3-Band Stereo Equalizer
The pocket-size Koss 3-Band Equalizer delivers high-fidelity performance and output normally reserved for more expensive home systems.With a 10dB boost or -10dB cut range of level, it features a 3-band equalizer that allows for convenient and individual bass, midrange, and treble adjustment.Power output is greater than 20mW per channel, providing clean and undistorted output into your favorite stereophones.Ergonomically designed for easy handling, a rotary volume control and on/off switch are placed for convenient usage.
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