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Cyber Acoustics AC-840 USB Connector Single Ear Internet Communication Mono Headset & Boom Mic

  • 20Hz-20KHz
  • USB Connector
  • 7 ft. Cord Length
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Value and quality meet in this versatile gaming headset. A USB port connects this device to your PC or MAC for true gaming connection!

The adjustable headband carries two leatherette covered earcups and a microphone. The noise-canceling microphone is adjustable to 180 degrees. The headset is thus ambidextrous, so the microphone can be on whatever side you favor. The adjustable boom arm lets you make it as close or as distant as you wish. The seven foot long cord allows for pacing after a tough gaming session.

This comfortable, adjustable stereo headset designed for amazing sound, is ready for you to take home!

  • newegg Maximum Comfort The Cyber Acoustics AC-840’s extra-large leatherette ear pads and adjustable headband deliver maximum comfort perfect for extended listening periods.
  • newegg Noise-cancelling Microphone The noise-canceling microphone blocks out unwanted background noise for optimal voice clarity without distortion.
  • newegg USB Connectivity The Cyber Acoustics AC-840 headset features a USB connector for the ultimate plug-and-play convenience. Just connect the headset to your computer and you are ready to go!
  • newegg Ambidextrous Design The ambidextrous Cyber Acoustics AC-840 headset features a 180° microphone so you can wear it with the microphone on your right or left side for convenience.

Learn more about the Cyber Acoustics AC-840


Cyber Acoustics


Headphone Frequency Response
Headphone Input Impedance
32 ohm
Ear Coupling
Single Ear
Cord Length
7 ft.


Microphone Impedance
~2.2K ohm
Microphone Frequency Response


USB Connectivity
DNCT4: Direct Noise Canceling Microphone Technology
Monaural headset
Adjustable headband
180 degree microphone
Leatherette ear pad
Adjustable boom arm
Inline Mute\Volume Control
Ambidextrous design (wear on right or left side)
PC / iMac Compatible

Manufacturer Warranty

1 year limited
1 year limited

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Cyber Acoustics AC-840

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  • Michael W.
  • 7/20/2013 7:02:26 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsMeh

Pros: Easy to set up, just plug it in and go.

Cons: The microphone boom is a little too short. I prefer that the mic be closer to the front of my mouth, this one sits in the middle of my cheek. Really cheap cord, I removed the clip to reposition it and wound up exposing the wires due to the cheapness of the cord. Luckily with a little electrical tape I was able to fix it up.

Other Thoughts: Wasn't expecting perfection for the price. I suppose it will be a good temporary/backup headset.

Did you find this review helpful? Yes No

  • Anonymous
  • 11/2/2011 9:34:31 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsExcellent for the price

Pros: Great noise reduction both in the ear and for recording, comfortable for long wear, great for internet phone and gaming

Cons: tight when first purchased, wires wear out if mic swapped from side to side too often

Other Thoughts: I've had a total of three of these, and while I wore out the first two, they lasted with a little splice repair. The first one died to being stepped on, the second died from swapping the mic too much. The one I have now has lasted a year plus, and so far I haven't swapped the mic a lot. Fantastic for gaming and internet phone without having to go entirely through the headset, it's wonderful to have my World of Warcraft sounds through my speakers and still be able to talk on Skype or Ventrilo without interference, and no one has any problems hearing me with many fans going, or my loud computer fan.

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  • zachary a.
  • 9/21/2011 8:05:22 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsJunk

Pros: USB all in one

Cons: Cheaply built and will not hold up to any type of abuse.

Other Thoughts: This was my second and last one I bought, went bluetooth now and have not looked back.

EVGA fourm member

0 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 7/7/2011 3:55:45 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsAcceptable for the price

Pros: Does what it says.
nice foam padding on the ear piece.

Cons: Low audio quality.
Will override your default speakers and will run everything through the headset.

Other Thoughts: Moderate Mic Quality.

0 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 1/26/2011 2:12:47 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsFantastic Headset.. for about a year.

Pros: USB, Adjustable mic, comfortable, great quality for the price

Cons: once the mic is loose, there is no way to adjust it, making it kind of useless.

Other Thoughts: If this headset had a microphone that did not pop off after about 11 months, or become extremely loose after 11 months, this headset would be the ultimately perfect headset.

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  • Amanda B.
  • 10/17/2010 8:52:41 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsBroke in 3 weeks

Pros: one ear, comfortable, USB

Cons: can't hear anything anymore

Other Thoughts: I use it several times a week, but I can no longer hear anything through the headphone. When the problem first started I could hear the audio breaking up and then nothing. I would jiggle the cord until audio came back and it would work for a little while but then stop working again. Finally it stopped all together. I changed the sound to go out to my regular speakers and still use this as a mic until I can find a better one ear USB headset. Another reviewer mentioned the cheap soldering so I will have to take a look at that, but that really shouldn't be necessary.

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  • Anonymous
  • 8/10/2010 5:29:16 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsWorks as expected

Pros: 1 eared headset/mic that works.

Cons: It is a little on the lower end of quality but I expected that with the price.

Did you find this review helpful? Yes No

  • Anonymous
  • 4/13/2010 11:12:55 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggs

Pros: Was comfortable. The microphone was easily adjustable.

Cons: All the sudden people said they couldn't hear me over ventrilo. Upon close inspection I quickly noticed one of the connections on the inside looked like it had previously been soldered on with barely any solder.

Other Thoughts: I've had better $12 headsets in the past. First thing I've ever bought from CA that I wasn't impressed with when comparing price vs. quality.

1 out of 1 people found this review helpful. Did you? Yes No

  • Amanda B.
  • 4/12/2010 12:38:00 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat for gaming

Pros: one-ear, comfortable, USB, price

Cons: boring looks, but who cares?

Other Thoughts: I use this for Ventrilo. I didn't want a bulky set that covered both ears since I like to have the game music coming out of my surround sound system. Because it is USB, you can set Vent audio in & out to go to it and leave everything else to the speakers without having to have two sound cards. (Many games have an option to mute speakers when pushing the Push To Talk button - definitely use it so people can hear you and not your speakers). It's sturdy, it has a long enough cord, and I've never had a problem with anyone being able to hear or understand me when using it. It's adjustable so it is comfortable too. I have long hair and this headset doesn't get tangled up in it. You can bend the mic out of the way if you are just listening. It makes you feel like a telemarketer though, but that's really the only con.

3 out of 3 people found this review helpful. Did you? Yes No

  • Joseph Z.
  • 12/21/2009 10:23:03 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

5 out of 5 eggs2 yr old headset

Pros: Ive purchased this from a local store appx 2 yrs ago. I use it daiy being a heavy gamer. Its used for hours on end over ventrilo and has worked flawlessly.

Cons: None to date.

Other Thoughts: the USB headset is a great add on to my current speakers. I can play sound over my main speakers and Ventrilo over the headset.

2 out of 2 people found this review helpful. Did you? Yes No

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