Sennheiser have just released the Momentum On-Ear headphones and announced a concierge service for owners of selected premium products.

The headphones boast high end 18-ohm transducers with a frequency range of 16 to 22,000Hz, for extra bass. And they sport a minimalist design in four trendy colors. They're going for $299 at authorized retailers, the Sennheiser Concept Store at Marina Square and the Sennheiser showroom at Alexandra Technopark.

At the same time, Sennheiser unveiled a "concierge" service for owners of selected premium models such as the superior HD 800, HD 700 and IE 800 headphones. They will enjoy a two-way local delivery service, a replacement set loan during the entire duration of service and an annual maintenance service—all for free.