4-Spring Reverb Tank, High Impedance Input, Balanced Output, Horizontal Mounting

The Accutronics 4BB2A1B is a model of a spring reverb unit commonly used in guitar amplifiers and other audio equipment. It’s part of Accutronics' line of reverb tanks, which are known for their distinctive, warm, and natural reverb sound. The "4BB2A1B" part number typically breaks down as follows:

• 4: Indicates the size of the tank (4-spring).
• B: Refers to the tank’s input impedance (high impedance).
• B: Designates the type of output (balanced).
• 2: The number of spring units in the tank (this typically affects the reverb effect's intensity and decay).
• A: The type of mounting (horizontal mounting).
• 1B: Denotes the general design specifications, which can impact the overall tone and feedback characteristics.