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Koss CS-100 USB (15116376)

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 $29.99 
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 $37.59
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 $109.99   
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Koss CS-100 USB
Colour
Connection and design
Designoverhead, open
Connection typewired
ConnectionUSB-A
Plugstraight
Cable supplysingle-sided
Cable length2.4 m
Cable typeround
Specs
Impedance32 Ohm
Frequency range30 – 16000 Hz
Sensitivity91 dB
Emitter typedynamic
Microphone specs
Microphoneon shackle
Frequency range100 – 16000 Hz
Sensitivity-56 dB
Microphone noise cancelingENC
General
Weight71 g
Added to E-CatalogMarch 2016
P/N
15116376

The information in the model description is for reference purposes.
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Koss 178188 Supra-aural On-Ear Over-the-Head Stereophone Headset

30Hz-16KHz USB Connector
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Delivery: in USA
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$29.99
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Koss CS100 USB - Headset - on-ear - wired 178188

The Koss CS100 USB communication headset boasts a full range of sound that brings every conversation to life. Hands-free communication via electrets, noise canceling microphone, is combined with high noise sensitivity and reduced sound distortion for clear conversations. The USB plug provides quick and easy connection to your PC. Whether your prima... morery use is for telecommunications, voice-activated software programs or indulging in multi-player video games, the CS100 USB headset offers long-lasting comfort and crystal clear communication. Communication made easy, with the Koss CS100 USB. Listen to your favorite music with this over-the-head design headset Your voice will be heard loud and clear with the boom microphone The CS100USB headset provides plenty of freedom with wired connectivity Hear every detail crisp and clear with a frequency response of 30 Hz-16 kHz Features USB connector
Officedepot.com
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$37.59
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Koss Communications USB Headset with Microphone (CS100-USB) ADIB00C0NWBEI

Koss Communications USB Headset with Microphone (CS100-USB)
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Delivery: in USA
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$109.99
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Model overview based on user reviews  
The Koss CS-100 USB headphones offer good sound quality, but users have noted significant issues with the microphone. When connected to a laptop without grounding, the microphone produces a terrible hum, which only disappears when the laptop runs on battery. While the microphone's sound is clear under these conditions, the headphones' flimsy construction and discomfort are also concerns. Potential buyers should be cautious if microphone quality is a priority and their setup lacks proper grounding.
Pros

Cons

User reviews 1
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Do not buy if the quality of the microphone is important and there is no grounding in the mains
25 November 2021 
I bought it for the quality of the microphone, but it is phoning.
Good headphone sound and this is the only advantage.
1. The microphone generates a terrible hum when connected to a laptop running on a 220 V grid, which has 2 wires, i.e., without grounding. The hum stops only if the laptop is disconnected from the 220 V grid and runs on battery. The sound of the microphone in this case is really good and clear.
2. Flimsy construction, the headphones are uncomfortable, they press, and at the same time, they do not fit equally...
Vladimir: use Koss CS-100 USB less than month
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