Koss The Plug

The Koss The Plug scores 14.7 out of 100 for music, landing at the 28th percentile for sound. The memory foam tips are comfortable at the 71st percentile, but that's the only real win. Calls are a disaster at 6.7 out of 100, and the mic is at the 11th percentile.

The sound is the headline, and not in a good way. A 28th percentile sound score puts this below most in-ears we've tested. The 16 ohm impedance means it's easy to drive from a phone or laptop, and the 112dB sensitivity means it gets loud without much power. But loud isn't the same as good. The memory foam tips do help with bass and isolation, and the 10Hz low end extension is technically there. In practice, the bass is present but muddy, and the highs don't do much to rescue the overall picture. Comfort is the one bright spot at the 71st percentile, which makes sense given the foam tips mold to your ear. Build quality is mediocre at the 34th percentile, and the 38g weight is on the heavier side for a wired in-ear.

Stacked against the competition, the Koss The Plug gets left in the dust. The Technics EAH-AZ100 and Sony WF-1000XM6 are wireless flagships with active noise cancelling and sound scores that embarrass this thing. The Bose QuietComfort Ultra is another ANC heavyweight that costs way more but delivers way more. Even the JLab JBuds, a budget wireless option, likely beats the Koss on sound and connectivity. The JBL Live Beam 3 also offers wireless convenience and better overall performance. The Koss is wired only, which is fine if you want simplicity, but the 12th percentile connectivity score reflects how limited it is compared to modern options.

There's no price listed in our data, which makes value hard to pin down. The budget score of 30.1 out of 100 sits right at the 52nd percentile, so it's not a standout deal even among cheap in-ears. One JPY listing shows 9,694 yen, but without more pricing context we can't call it a bargain. The memory foam tips are the main thing you're paying for here, and they do deliver on comfort. But comfort alone doesn't justify a purchase when the sound is this far behind.

The Koss The Plug is a budget in-ear that leans hard on its memory foam ear tips for isolation and fit. The numbers tell a rough story: a 14.7 music score and a 30.1 budget score out of 100. That budget score is middle of the pack at the 52nd percentile, but the music score lands in the bottom third at the 28th percentile. You're getting a 16 ohm dynamic driver with a 10Hz to 20kHz response and 112dB sensitivity, which sounds fine on paper until you hear it next to almost anything else in our database.

Skip this if you care about sound quality at all. The 28th percentile sound score and 14.7 music rating put it below most in-ears we've tested. Skip it if you need to make calls, since the 6.7 calls score and 11th percentile mic are dealbreakers. Skip it if you want wireless, because the 12th percentile connectivity score reflects a wired-only design with no modern features. Honestly, skip it unless you specifically want memory foam tips and nothing else matters.

The Koss The Plug is a hard pass for most people. The memory foam tips are genuinely comfortable, and the 71st percentile comfort score is the one thing this product does well. But a 14.7 music score and a 28th percentile sound ranking mean you're sacrificing the entire point of headphones. If you need something cheap and wired for a specific use case like monitoring or a backup pair, it might squeak by. For everyone else, there are better options at similar prices.