I like that these phones come with a 3-meter straight cable hard wired to the phones plus a convertible plug that changes instantly from either a 1/4-inch or mini plug. They are ready to go at any time from listening at home, to the studio, and then straight for use with your portable music player/iPhone. In the recording studio, I prefer straight cables on headphones--they usually never catch on edges, lie flat on the floor, and seem to last a lot longer and don't knot up like curly-cords.

The circumaural, semi-closed design of the K44 Perception phones have a solid low frequency response and are fine for music enthusiasts on a budget. Next are the stylish K77 Perception headphones; they are a different look for semi-closed headphone and have good bass and sound.

I received a set of the K99s for evaluation and they are a semi-open design with large, 40-mm drivers. These drivers produce good bass for musicians and singers who want to feel their music while recording or just grooving. The K99 Perceptions are very lightweight and a pleasant fit on my head for long sessions. They sounded great connected to my Aphex Systems Model 454 HeadPod headphone amp.