Made to resonate steel stringed instruments, Ferrous’ spinning disc contains six strong earth magnets. Adjusting the rotational speed of the disc will change which strings are most affected and their harmonic content. If the disc is spinning slowly lower strings resonate; if the disc is spinning quickly higher strings will resonate louder. The results can sound like an unknown instrument in a reverberated physical space, floating sine wave tones, or feedback. Fluctuation of rotation speed by using the thumbwheel, rev button, touch-plate or control voltage input can create a soft strumming effect across multiple strings or shifts in harmonic content. New harmonics and overtones can emerge from both lower and higher strings as the disc spins faster. The distance at which Ferrous is held from strings affects how strongly they will resonate and their harmonics. If Ferrous is placed near guitar pickups you will hear the heavy sounds of the magnets and the motor with the resulting pitch based upon the disc’s RPM. Note: Ferrous ships without a 9v battery, we strongly recommend purchasing EBL USB Rechargeable 9V Li-ion 5400mWh Battery. Be weary of other 9v Rechargeable batteries (and particularly those that are less than 2000mWh) as some may not be able to provide enough power to properly power the brushless motor. Also note that 9v Carbon Zinc batteries do not supply enough power! Size: 5.25” x 2.5” x 1” / 13.33cm x 6.35cm x 2.54cm Weight: 0.4 lbs / 0.15 kg Power: 9v Battery
