Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more. Koss Headphones Reviews Koss Fitbuds BT190i Review Score Good gym earphones, but there are better wireless options Review Price: £44.99 Koss Andrew Williams Koss SP540 Review Score As portable as over-ear headphones get Review Price: £129.99 Koss Edward Chester Koss KEB79 Noise Isolating Earphones Review Score Koss releases its most expensive earphones to date, but how do they compare to the competition? Review Price: £49.99 Koss Edward Chester Page 1 of 1