ARP 2600 :
The ARP 2600 was produced in early 1971 and is known as the “Blue Marvin”.The ARP 2600 is a semi-modular analog subtractive audio synthesizer, designed by Alan R. Pearlman with Dennis Colin, and manufactured by his company, ARP Instruments, Inc. as the follow-on version of the ARP 2500. The ARP 2600 was semi-modular with a fixed selection of basic synthesizer components internally pre-wired. The ARP 2600 was thus ideal for musicians new to synthesis, due to its ability to be operated either with or without patch cords.