Koss PRO4AAAT review

Despite passable looks, these headphones from Koss are heavy, cumbersome and with a poor, ill-defined sound that's best avoided Tested at £155.00

What Hi-Fi? Verdict

Despite impressive looks, these Koss's are poor performers


  • +

    Generous bass


  • -

    Hard, thin sound

  • -

    uncomfortable to wear

  • -


Why you can trust What Hi-Fi? Our expert team reviews products in dedicated test rooms, to help you make the best choice for your budget. Find out more about how we test.

Compared to close rivals, these cans from Koss feel heavy and cumbersome.

The rubber ear pads aren't very comfortable: ironic, because these headphones are comfortably the poorest performers we've seen for a while.

Listen to Eminem's Same Song and Dance and it sounds like it was recorded from the confines of a size five shoebox: there's a hard edge that renders long-term listening impossible.

The only saving grace is that bass is generous, but still, they're way behind their rivals

See all our headphone Best Buys

Follow whathifi.com on Twitter

What Hi-Fi?

What Hi-Fi?, founded in 1976, is the world's leading independent guide to buying and owning hi-fi and home entertainment products. Our comprehensive tests help you buy the very best for your money, with our advice sections giving you step-by-step information on how to get even more from your music and movies. Everything is tested by our dedicated team of in-house reviewers in our custom-built test rooms in London, Reading and Bath. Our coveted five-star rating and Awards are recognised all over the world as the ultimate seal of approval, so you can buy with absolute confidence.

Read more about how we test