Wella Professionals Velvet Amplifier Wet Style Primer. With Velvet Amplifier, Wella have created a high-performance style primer (their first ever) that evens and smooths the surface of the hair to prepare it for styling. Just a single pump is needed to improve manageability and amplify control. In tests in 2010, 7 out of 10 hairdressers agreed that Velvet Amplifier gave an instantly noticeable WOW reaction and enhanced their creativity. Wella call is their must-have product because of the difference it makes to the way hair reacts to being styled.