ARP-2600 / Page 2 Inside the Arp 2600

Page 1 Front Panel and Layout

The ARP 2600 was designed by Alan R. Pearlman and was produced from 1971 - 1981.

These pictures were taken in April 2021 of an Arp 2600 with these serial numbers;

Main Synth Arp Model 2601 (S/N 2601- 0064),

and matching 3620 keyboard (S/N 3620 -0064)


Above The Arp 2600

Below the cabinet opened up to reveal a very clean synthesizer

Below is the Arp 2600 opened up to reveal its guts

----------------Reverb Tank Below -------------------------------------------------------------------Power Supply Here

- RingMod --- OSC 1 ------ OSC 2 ------- Osc3 --------- Filter -------------VCA------------Output


Below is a close up view of the 4014 ring modulator module and the first Oscillator (OSC1)

Below is a close up view of OSC 2 and OSC3 (4027 modules on left)

Wave shaper board under OSC2 to make sine and triangle

Below is a close up view of the 4012 (Moog style) Low Pass filter module encased in brass shielding

Below is a close up view of the output section

Below is a close up view of the lower circuit board

Below is a close up view of the rebuilt power supply

Rebuilt in 2021 with new Big Blue Caps (Glued and strapped down)

and newer small caps


Below showing the difference between a module not encased (un encapsulated) ,

Left side small square boards not encased,

and at bottom an encased (encapsulated) 4012 module, here with brass shielding added


Silicon Breakdown has been a source of Music as well as free information and pictures of analog synthesizers since 1999

The Music side of this site contains the sounds of Silicon Breakdown MUSIC HERE About Silicon Breakdown

The Synth side showcases beautiful instruments from the past. ANALOG SYNTHESIZER INFO HERE

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