Formula 55

Catalinbread Formula 55 power requirements

• 9V DC · centre negative · draws 5mA

  the voltage it ships for · also runs on a 9V battery · from the maker

  “You can power your Formula No.55 with a 9v battery or any good quality filtered and regulated 9-18vDC power supply with a center-negative tipped plug designed for use with effects pedals. … 5mA power draw at 9vDC, 10mA power draw at 18vDC” source

  Checked 2026-10-13

• 18V DC · centre negative · draws 10mA

  from the maker

  “regulated 9-18vDC power supply with a center-negative tipped plug designed for use with effects pedals. … 5mA power draw at 9vDC, 10mA power draw at 18vDC” source

  Checked 2026-10-13

Size

59.94 × 109.98 × 49.78 mm (2.36 × 4.33 × 1.96 in)

Width × depth × height, from the enclosure standard.

Power supplies that can run it

Each has an output that can power it, checked against its published figure. Plan the whole board to see what runs everything.

• Walrus Audio Canvas Power 1515 outputs · isolatedSweetwater
• Rockboard ISO Power Block V1615 outputs · isolatedSweetwater
• Fender Engine Room LVL1212 outputs · isolatedSweetwater
• Rockboard ISO Power Block V12 IEC12 outputs · isolatedSweetwater
• Voodoo Lab Pedal Power 3 Plus12 outputs · isolatedSweetwater
• Truetone 1 SPOT Pro CS1111 outputs · isolatedSweetwater