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Koss 'The Plug' In-Ear Headphones (Black)

by Koss
7,979 customer reviews
| 12 answered questions

List Price: $19.99
Price: $9.99 & FREE Shipping on orders over $35. Details
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  • 16 to 23,000 Hz frequency response
  • Deep bass performance
  • 4- Foot cord
57 new from $8.05 1 used from $10.99
$9.99 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Gift-wrap available.

Frequently Bought Together

  • Koss 'The Plug' In-Ear Headphones (Black)
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  • Koss PORTABLE Replacement Cushions
Total price: $14.48
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Technical Details

Color: Black
  • lightweight

Compare to Similar Items

This item: Koss 'The Plug' In-Ear Headphones (Black)
Customer Rating 3 out of 5 stars (7979) 4 out of 5 stars (24637) 3 out of 5 stars (39) 4 out of 5 stars (109)
Price $9.99 $7.00 $15.37 $16.10
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By GizmosForLife Hippo-Deals
Color Black Black Black other
Special Features lightweight lightweight lightweight lightweight
Fit In-Ear In-Ear Intraaural In-Ear
Dimensions 1 inches x 6 inches x 4 inches 6.75 inches x 3.6 inches x 3.25 inches 2.65 inches x 7 inches x 1.06 inches 1 inches x 7.75 inches x 2.5 inches
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Product Description


Product Description

The Koss Plug revolutionized the world of in-ear headphones. A first of its kind, these are stereo, noise isolating in-ear headphones that deliver the kind of accurate acoustical reproduction and isolation typically found in high-end, closed-style high fidelity headphones. A dynamic element positioned just outside the ear connects to a tubular port structure that inserts into a soft, expandable cushion. The soft, foam cushion expands for a custom comfort fit with every listening experience. It also improves isolation, plugging out ambient sounds, and enhances deep bass and treble clarity.

Koss's miniature portable earphone, affectionately dubbed "The Plug," makes use of an ear-cushion material (similar to that used in sound-blocking earplugs) that slowly expands in your ear canal to provide a custom fit and maximum sonic isolation from external noises. A detachable, extrawide headband makes these Koss-termed "stereophones" easy to carry or store.

For accurate sound reproduction, these earbud-style headphones are made with oxygen-free copper voice coils and neodymium iron boron magnets. You can enjoy them with either a portable or home audio device, since both 0.125-inch and 0.25-inch adapter jacks are included.

"The Plug" weighs a mere quarter ounce and has a frequency response rated at an impressive 16 to 23,000 Hz (though its unlikely you'll hear bass output anywhere close to what you'd get from a similarly rated loudspeaker!).

Impedance is 16 ohms, with less than a 0.3 percent distortion and reasonably high sensitivity of 112 dB SPL/1 mW.

Product Details

Color: Black
  • Product Dimensions: 6 x 4 x 1 inches ; 0.3 ounces
  • Shipping Weight: 0.3 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B00001P4XA
  • Item model number: 156407
  • Average Customer Review: 3.1 out of 5 stars  See all reviews (7,979 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at July 8, 2002

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

280 of 288 people found the following review helpful By Mark Colan VINE VOICE on June 9, 2003
Color: Black Verified Purchase
NOTE: the description I saw on the Amazon page does not reflect the product I have. Above it discusses a headband and an adapter which are not part of this product. Also, the rated frequency response is 10-20k, not 16-23k. I think this is (or was) an Amazon editorial error.
My interest for this product is as a solution to listening to music, lectures, and movies while travelling, and I travel a lot. I have a set of Panosonic noise-cancelling headphones which were good (about five times more expensive than these earbuds) though bulky, but the plastic broke so they won't stay on my head now.
These earbuds are an excellent alternative to noise-cancelling headphones for the frequent traveller. I find them more comfortable for extended listening than most conventional headphones. The ability to seal out noise from the external environment is very good, and makes it possible to understand what actors are saying when watching a movie on an airplane.
The overall performance - sound quality and noise blocking - is not as good as the Bose noise cancelling headphones, but the Bose are 20 times as expensive, much less convenient to carry, and subject to damage from the rough world of the road warrior. If The Plug had an optional noise-cancelling unit (say, combined with the eq), it would be a killer combination - are you listening, Koss?).
The sound is good. Bass-heavy, to be sure; I would like them better if they had a flatter response, but the product is marketed at the portable music crowd, and many of them are looking for dramatic bass rather than golden-ears sound.
Besides, mobile sound is always a compromise, it's just a question of whether the compromise they chose works for you.
Here are some problems I've heard and the solutions:
Read more ›
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105 of 110 people found the following review helpful By Birdman on November 17, 2014
Verified Purchase
For the price, it's hard to beat. I bought the exact same headset a few months ago and paid around $35 for it. I just got two of these and it was still cheaper. The headset is great for people like me that can't wear the standard Apple headsets 'cause they fall out. I can only wear in-ear headsets and this one works great. It's also very comfortable and easy forget you're wearing it. There's a LOT of volume available on these; in fact, in a quiet room I have to put them on the lowest volume. Between the in-ear buds and the volume, I have listened to music while driving my lawn mower and still not had to go to full volume. Pairs easily with my iPad, Mac and iPhone. The on-board Next & Prev song buttons aren't ideally located but once you get used to them you can find them fairly easily. As on every other headset I've seen, the Next & Prev song switches double as volume controls (press once to go to Next or Prev song, press & hold to lower or increase volume) . Note that the buttons do control my iPhone and iPad remotely but, for whatever reason, not my Mac Mini. It's not a big deal - just use the Mac volume control and it works fine. One big nuisance, and the reason for not giving it 5 stars, is that the headset speaks the words "Connected", "Pairing", "Power Off", etc., but it speaks at FULL VOLUME. If you have the ear pieces in, it's at best jarring and at worst, it hurts your ears. When a product does something this stupid it always makes me wonder if anyone at the company ever uses the product 'cause it is a very obvious nuisance and shouldn't have gotten out the door like this. However, with all the benefits; easy pairing, great volume, great battery life and comfortable fit, it's something you can learn to live with.Read more ›
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291 of 315 people found the following review helpful By Andrew Arnold on March 4, 2014
Size: Old Bluetooth 3.0Color: Red S9 Verified Purchase
This is the first Bluetooth headset I've owned. It's a no name brand from China so I didn't expect much. The instructions included are fairly useless, but I really had no trouble with the set up. I'm no audiophile so I can't speak to the quality of the sound because I use it when I'm walking for audiobooks, plus I've got a little bit of a tin ear. But it sounds clean and clear to me- no interference at all. When I got it, I was on my way for a walk, so I figured I'd try it out right away- no charging first. It lasted through the whole half hour walk. When I got home I charged it, and within a half hour it completed the charge. (I don't know how long the charge will last, if need be I'll update the review). As the title suggests, it's a great value- you'll pay this much for a regular set of wired headphones (Which I hate like Wile E. Coyote hates the Road Runner). So I'm very happy with the purchase.

BATTERY CHARGE UPDATE- I use these headphones for about 30 minutes every day and the charge lasted about 2 weeks before it needed a recharge. When the battery is low, you'll begin hearing 4 quick beeps every 15 seconds and then after a few minutes, it will shut off. Also, I forgot to mention that I'm a 'big and tall' guy so the back of my neck looks like a package of hot dogs, and I would describe the fit of the headset as snug. It's not too tight but almost, so if you're not a Heavy Chevy like me, they will probably fit perfectly comfortably.
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302 of 328 people found the following review helpful By S on March 25, 2014
Size: Old Bluetooth 3.0Color: Red S9 Verified Purchase
Received the headset and was eager to try it out. Looks sharp with the red and black styling. First fit was good for my small neck and ear buds sat comfortably in my ear. The red plastic covering the back of the neck was loose on one side. Tried to push it back but it did not stay. It wasn't a snap joi nt but it needed to be glued in place. No big deal. Will do that if I decide to keep it.

Unfortunately I will have to wait for some instructions before I can review the sound quality and pairing capabilities. I could not truth this unit on. There is one pin hole marked with on/off below it. Tried the usual paper clip method but can't feel any clicks and given the fragility of the product, I dare not pushed too hard. Waiting for others to comment on how to turn this unit on and off. If unable to do that, it is going back.

Vendor replied with options to return or replace it but I got it figured out and now testing the unit before final decision.

Do not stick anything into the pin hole. It is not a switch but the LED. What's mark as on/off is really the status led.

The instruction in the back of the packaging refers to a Bluetooth key, that's the play button or the center button. Hold that for about 5s to turn it on. This is also the talk and hang up button.

To pair, press the play button and hold it until it alternates between blue and red for paring, this can only be done from the off state.

To turn it off, Press the play button until you see it flash red. Let go of the play button.

To turn it on, press he play button until you see a blue light, let go of the button.

To answer or hang up, press the play button.
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Koss 'The Plug' In-Ear Headphones (Black)
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Price: $9.99
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