The ImPasse Preamp Apr 28, 2009 | ImPasse, Preamps This project was published in AudioXpress in February 2009. They have been kind enough to allow me to put it up here. Jack Walton has done some lovely PCB designs- they can be found at his site, www.tech-diy.com. Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.