Accutronics 4AB3C1B Reverb Tank New Production Accutronics 4AB3C1B Spring Reverb Tank Long (16 3/4") 2 Spring Unit, Long Decay Input Impedance 8 Ohms, Output Impedance 2250 Ohms Mounting: Horizontal Open Side Down. Connectors: Input Insulated/Output Grounded Made In South Korea