The drivers are large, 50-mm diameter titanium-coated units that use oxygen-free pure copper voice coils making these phones able to produce up to 114 dB SPL/V. They have a rated impedance of 32-ohms. They fold up using a new design with the drivers rotating upwards under the headband using a graduated ratchet mechanism so they stay folded up until unfolded. Love this!

I immediately tried a gunmetal black set sent to me for review using an Aphex Systems Model 454 HeadPod 4-channel headphone amp. With four identical amplifiers and volume controls, I can easily listen to four sets of different phones all running at the same time to compare the same music feed.

I found the K371 to sound better to me than a set of $300 pair of studio headphones--they were clear in the important mid-range frequencies and the deep bass is more solid sounding. I like the way they fit on my head and ears plus they are smaller and lighter weight than most studio headphones. In fact, they have taken the place of my studio phones at the listening position in my studio--I use them as a second check of my mixes and/or while recording in the same room with my monitor speakers muted.

The AKG K371 headphones are comfortable to wear and also come with a carrying pouch and are an excellent value at $149 MSRP.