To S. Andrea Sundaram,

Thank you for your highly informative and professional review of the PSB M4U 2 headphones.

I am strongly interested in a quality pair of headphones and enjoy the professional reviews in my research of comparing various products. Given the range and expense of over-the-ear headphones, it is vital to be as thoroughly informed as possible before deciding on a particular headphone.

Have you reviewed the AKG K 702 Headphones? I am strongly interested in a comparison of these headphones to the PSB M4U 2. I acknowledge that the PSB M4U 2s are active noise-canceling headphones.

If you are able to, please assist me; I would be deeply grateful.

Regards,
Anthony

I have not reviewed the AKG K 702 headphones, but I am familiar with the sound of the K 701s, which are essentially identical. The active noise cancellation is not the only thing that makes the PSBs different from the AKGs. The K 701 and K 702 are open-back designs. That means that they block no ambient noise and leak significant sound into the environment. For those reasons, they're really most appropriate for listening alone in a quiet room. They also require a high-quality headphone output or a dedicated headphone amplifier to perform at their best. If that fits with the way you are planning to use them, the K 702s are more detailed than the M4U 2s, as well as more transparent and with better high-frequency extension. The M4U 2s have deeper, fuller, punchier bass, especially in Active Mode, and are more forgiving of poor recordings. I hope that helps. . . . S. Andrea Sundaram