From the beginning of sound reinforcement industry to today, two technician’s generations have run a most important number of equipment generations. While products life duration decrease, technologic development is speeding up and technical requests moves fast and radically we work to keep a regular and innovative technologic politics able to fit onto business changes. Sustainability of our choices is a fundamental criterion to secure our owners investments. Nobody can say what the future reserves us but a glance can learn from the past. The 17 years old of PS15 or the multi-purpose Ethersound™ technology born in the beginning of this are the most significant examples of our approach.