Koss SB40 184755

The Koss SB40 is a budget wired gaming and communication headset with a decent noise-cancelling mic. Sound is average and comfort is among the worst we've seen. It's only worth considering if you need a cheap wired option for calls and don't mind the heavy, uncomfortable build.

Let's talk specs. The SB40 uses a dynamic driver with a 20Hz to 20kHz frequency response, 120 ohms of impedance, and 96dB sensitivity. That impedance is on the higher side for a budget headset, which means you'll want a decent amp or at least a powered USB sound card to get real volume out of it. Plug it straight into a phone or a weak laptop jack and it'll sound quiet and thin. The mic is the headline feature here, and it lands at the 64th percentile in our database. That's solid, middle of the pack territory. The noise-cancelling mic does a decent job cutting background chatter, which is genuinely useful for voice calls and speech recognition software. Sound quality overall sits at the 40th percentile. You get a balanced-ish profile, but nothing that'll make music or explosions feel exciting. The closed ear cups do help with isolation, though the ANC score is weak because this is passive isolation only, no active noise cancelling.

Stacked against the competition, the SB40 struggles. The TOZO HT3 and Soundcore Life Q20 are both wireless with active noise cancelling and much better comfort scores. The JBL Tune 670NC also brings ANC and a more modern feature set. Even the QCY H3 PRO and Sennheiser ACCENTUM Plus, while pricier, are in a completely different league for sound and build. The SB40's one advantage is its wired reliability and the noise-cancelling boom mic, which none of those wireless options match in raw mic clarity for calls. But that's a narrow win. For gaming, the SB40's sound is just average, and the heavy build means it gets uncomfortable fast. If you're comparing the Koss SB40 to a modern wireless headset, the Koss feels like a relic from 2010.

At USD 45 to USD 51 in the US, the SB40 is cheap, but cheap doesn't always mean good value. The price spread across vendors is small, just USD 6, so you're not saving much by shopping around. The best US deal in our data comes in at USD 45. For that money you get a functional headset with a usable mic, which is fine if your only goal is voice chat. But the comfort score is a real problem. It ranks at the 6th percentile, which means almost every other headset we've tested feels better to wear. If you're planning to use this for hours at a time, that's a dealbreaker. The Soundcore Life Q20 and TOZO HT3 both cost more but add wireless, ANC, and far better comfort. The SB40 only makes sense if you absolutely need a wired headset and your budget is rock bottom.

The Koss SB40 is a wired, over-ear communication headset aimed at gamers and anyone who spends hours on calls. It sits in the budget bracket, with US listings running between USD 45 and USD 51 depending on the vendor. That's cheap for a headset with a noise-cancelling boom mic, but the SB40 makes some serious trade-offs to hit that price. It's a closed-back design with leatherette ear cups, a 3.5mm wired connection, and a chunky 522g build. If you're searching for a simple plug-and-play headset for Discord or Zoom, this one technically fits the bill. But our database shows it's not exactly a standout in any category that matters for daily use.

Skip the SB40 if you want wireless, active noise cancelling, or all-day comfort. Commuters should look elsewhere, the commute score is the weakest area at 16.1 out of 100. If you listen to music more than you talk on calls, the sound quality won't impress you. And if you have a sensitive head or wear glasses, the tight leatherette ear cups and heavy frame will likely become painful. For a bit more money, the TOZO HT3 or Soundcore Life Q20 offer a much better overall experience. The SB40 is really only for budget buyers who need a wired mic-first headset and don't care about comfort.

Should you buy the Koss SB40? Only if you need a cheap wired headset for voice calls and nothing else. The mic is fine, the sound is passable, and the price is low. But the comfort is genuinely bad, the build feels flimsy, and the high impedance means you might need extra hardware to get decent volume. For gaming, it's underwhelming. For music, it's forgettable. For long work calls, it'll hurt your head. There are better budget options out there, even if they cost a bit more. The SB40 is a niche product for a very specific buyer, and that buyer probably already knows they want a wired Koss headset.