A prototype by Arius Blaze - the Feedback Hall is a sound art object. It's simply a large dual spring reverb (almost 4 feet tall), designed to not just process musical sound but to act as an atmosphere generator - a standalone art work in a home. The Feedback Hall picks up sound in the room, sends it into a preamp, into an amp, through the springs, into the pickup, into an amplifier and out of the speaker box.
It simply takes the sound and vibration in the room and turns it into an ambient field. The sound is sweet and soothing. Additionally, it can be used to process external instruments and sound.
The photos are not very good, but there will be more in the future - along with sounds and hopefully video.