Koss Stereophones

PRO4AA

PRO4AA - Main image
$83.94 $114.99 In stock

Category: Over Ear Headphones

Koss Pro4AA headphones set the standard for full size professional headphones. They were introduced in 1970 as the first dynamic headphones to deliver true full frequency and high fidelity performance with impressive noise isolating capabilities.

Learn More about on placing International Orders from Koss.com 

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.4 / 5 · 5 reviews)

Henry ★★★★★

Pulled them out of the box and immediately noticed how solidly they're built, with that full-size over-ear design that actually seals out the room noise. The sound quality on the low end is surprisingly clear for a model from 1970, and they handle my studio monitors without any distortion at normal

Emily F. ★★★★★

After decades of use with these, the full-frequency response still holds up perfectly for my studio sessions, and they've survived countless drops without a single failure. The clamping force takes a week to break in, but once it does, the isolation is fantastic and they sound as clear as anything I

Lily ★★★★★

These cans have been my daily drivers for weeks and they still sound as clean and balanced as day one, which is exactly what I needed from a pro monitor. For something built in 1970, the full-frequency response is remarkably honest with no hyped bass or harsh treble. Solid, heavy, and built like a t