Bass Amplifiers Recalled by Fender Musical Instruments Due to Fire Hazard. The recall involves the SWR Natural Blonde 120V acoustic bass amplifier, model 44-60600-000. The amplifier measures about 26 inches x 16 inches x15 inches, and has a blonde-textured vinyl covering with a black control plate and black stamped steel vibration-free grill. The model number is located on the top rear panel of the amplifier. SWR and Natural Blonde are printed on the front of the amplifier.