I got these in blue when on offer at £23.99 a few weeks back, now the red are available at an even better price. Build quality is good, certainly on par with other similar AKG products. Bear in mind that they are on the smallish and more compact side and are close fitting, so if you want a headphone that stays firmly clamped to your head, these are definitely worth considering, but don't expect to be able to bend the spring much to make them looser as the headband will most likely crack (and this maybe why some people report poor build quality). Typically on Amazon at £40-£50, around £70 when got direct from AKG, and was around £100 when first released. If red is not your colour, they're also available in blue, black, pink, orange and green, but the other colours are all are currently pricier than the red.
When I listed this deal they were £22.58, now dropped to £22.25
Details from Amazon website:
The premium addition to the AKG DJ range, these K619 headphones are a professional-grade headset without rival. When it comes to sound quality, design innovation, portability and a long-lasting, comfortable fit, this DJ-style headset delivers. An in-line microphone and volume control are built right in, so you won't miss a call. The closed-back ear-cup design keeps outside noise out, and the 3D-Axis folding mechanism makes the K619s easy to transport and store. If you're serious about audio, experience this signature AKG product from the brand that has been the leader in studio-quality headphones for over 60 years. The premium addition to the AKG DJ range, the K619 headphones are a professional-grade headset without rival in sound quality, design innovation and long-lasting, comfortable fit. Their high SPL capability generates powerful sound and impressive performance. Their closed-back ear-cup design keeps outside noise out and prevents your audio from leaking out. Their single-sided cable eliminates cable tangling between ear-cups, and an included 1/4-inch (6.3-millimeter) jack adapter increases your connectivity options. As for portability, the K619s' 3D-Axis folding mechanism makes them easy to transport and store. And an in-line microphone and volume control are built right in, so you don't have to take the headphones off to answer a call.
1 set of AKG K619 DJ headphones
1 1/8"" to 1/4"" (3.5 mm to 6.3 mm) jack adapter
1 3' 11"" (1.2 m) cable plus 1 3' 3"" (1 m) extension cable
1 carrying bag