1st crazy hoot of 2012, a pair of AKG K601 headphone. From the picture, you identify this is definitely a studio headphones, only be used indoors due to it's open-back design (you can see the pores on the sides of the headphones). This was AKG's flagship model in the early 2000s, I got his off someone for SGD200.00. Retailing for SGD399.00. AKG K601 Flagship model Open-back-phones technically provide more sound-stage (often refers to the 3D-sound replicated in a theatre or concert hall), favored by the audiophiles for its clarity, transparency and smooth audio-bliss coming from the can. That said, the bass "punch" would be vastly neglected. Sound are made from mini vibrations, bass are rated at the lower end of 50-70hz, low but punchy, hence without the isolation, the punch will be lost due to the open cans design (No bouncing off "walls" of cans). My preference of audio is quite focus, give me a bass monster or an elegant audiophile sexperience...