Name: Gerrard Street  Plus: Modular headphones, easy to repair and pay per use from The Netherlands Field: Product as a service Features: High range headphones, delivered in the mailbox as a kit, easy to repair, update and disassemble, available by paying a monthly fee. The potential market for this service is that of customers who usually buy low-cost headphones and earphones.      The Dutch start-up Gerrard Street rents design and high quality headphones (with a market value of around €250) for €7.50 a month. The idea of product as a service enters the world of headphones, through its totally modular models of headphones that can be delivered in the mailbox as a kit.  The headphones are designed to be assembled and disassembled: If any part breaks, the cu...