A self amplified speaker system designed to be used with a organ.
There are two main types of commercially available tone cabinets used with Hammond organs: HammondToneCabinets and Leslies.
StefanVorkoetter built his own tone cabinets into a wall-to-wall window seat bookcase, as described in his article 
Window Seat Bookcase Tone Cabinets for a Hammond Organ.
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