RESEARCH
What products perform similar tasks?
Roland AF-70 Anti-Feedback DI
Peavey Mentor Feedback Eliminator
Sabine FBX Feedback Exterminators
The U.S. Patent Database
5245665 : Method and apparatus for adaptive audio resonant frequency filtering; Sabine Musical Manufacturing Company, Inc. 5533120 : Acoustic feedback cancellation for equalized amplifying systems; Tandy Corporation
Other resources
Institute for Signal and Information Processing (ISIP) The Institute of Electrical and Electronics Engineers (IEEE) Audio Engineering Society (AES) The Acoustical Society of America (ASA) Review of Peavey Milestone Bass Guitar