accutronics® Products and Specifications TYPE 4   The industry standard for years, the Type 4 is still manufactured today using Hammond’s original design. Four counter wound and coupled springs deliver superior mechanical performance and the classic sound that helped make the Fender Twin Reverb Amps famous. Outer channel dimensions are 16.75” Length x 4.375” Width x 1.313” Height. TYPE 8   Designed for applications in which the overall sound quality is important and a compact package is required. Small in size, this three spring reverb approaches the rich textural quality of our larger reverb units. Outer channel dimensions are 9.25” Length x 3.375” Width x 1.313” Height. TYPE 9   Six springs, counter wound, coupled and placed in parallel, combine to create Sound Enhancements’ fullest, richest reverb effect throughout the full range of musical sound. Ideally suited for keyboard, sound reinforcement and pedal steel applications. Outer channel dimensions are 16.75” Length x 4.375” Width x 1.313” Height.   PART NUMBERING SPECIFICATIONS FOR TYPE 4 EXAMPLE: 4EB3C1B DIGIT #1 - REVERB TYPE 1 for Type 1 or 4 for Type 4 DIGIT #2 - INPUT IMPEDANCE A = 8 Ohm B = 150 Ohm C = 200 Ohm D = 250 Ohm E = 600 Ohm F = 1475 Ohm DIGIT #3 - OUTPUT IMPEDANCE A = 500 Ohm B = 2250 Ohm C = 10000 Ohm DIGIT #4 - DECAY TIME 1 = Short (1.2 to 2.0 sec) 2 = Medium (1.75 to 3.0 sec) 3 = Long (2.75 to 4.0 sec) DIGIT #5 - CONNECTORS A = Input Grounded / Output Grounded B = Input Grounded / Output Insulated C = Input Insulated / Output Grounded D = Input Insulated / Output Insulated E = No Outer Channel DIGIT #6 - LOCKING DEVICES 1 = No Lock DIGIT #7 - MOUNTING PLANE A = Horizontal Open Side Up B = Horizontal Open Side Down C = Vertical Connectors Up D = Vertical Connectors Down E = On End Input Up F = On End Output Up PART NUMBERING SPECIFICATIONS FOR TYPE 8 & TYPE 9 EXAMPLE: 8EB2C1B DIGIT #1 - REVERB TYPE 8 for Type 8 or 9 for Type 9 DIGIT #2 - INPUT IMPEDANCE A = 10 Ohm B = 190 Ohm C = 240 Ohm D = 310 Ohm E = 800 Ohm F = 1925 Ohm DIGIT #3 - OUTPUT IMPEDANCE A = 600 Ohm B = 2575 Ohm C = 12000 Ohm DIGIT #4 - DECAY TIME 1 = Short (1.2 to 2.0 sec) 2 = Medium (1.75 to 3.0 sec) 3 = Long (2.75 to 4.0 sec) DIGIT #5 - CONNECTORS A = Input Grounded / Output Grounded B = Input Grounded / Output Insulated C = Input Insulated / Output Grounded D = Input Insulated / Output Insulated E = No Outer Channel DIGIT #6 - LOCKING DEVICES 1 = No Lock DIGIT #7 - MOUNTING PLANE A = Horizontal Open Side Up B = Horizontal Open Side Down C = Vertical Connectors Up D = Vertical Connectors Down E = On End Input Up F = On End Output Up