Sennheiser HD 650 Headband Headphones - Titan NOB Contents: Come with all accessories in retail box. New Opened Box Condition. Description The HD 650 has superbly low harmonic distortion and precision sound reproduction across the entire frequency range. The bass is well ballanced and crisp, with authentic deep bass reproduction. The trble and mid range are well ballanced and ensure superbly realistic voice reproduction. Instrumental music pleasantly natural and yet lower notes clear and vibrant. Features Open, Dynamic, Circumaural Desi