Roger Schult W2324 phase shifter - Gearslutz @ Musikmesse 2016 - YouTube
Hands-on with the Roger Schult W2324 phase shifter at Musikmesse 2016 - Frankfurt!
Home Recording Studio Build It Like The Pros
(Second Edition) by Rod Gervais . This book teaches you how to do all these things, from building a professional home studio to saving thousands of dollars in the process.