wood enclosure, making it a more portable instrument. V2.0 of the 2600P replaced Teledyne 4011/4017 VCO chips with more reliable 4027 chips by National Semiconductor for a brief run in 1972, before being replaced by 2600P v3.0, which was produced until 1974 and utilized 2037-1 VCO chips and featured a new G-clef ARP logo. In 1974, 2600P v4.0 introduced the new Model 3620 duo-phonic keyboard with LFO. Model 2601 (1975): 2601 v1.0 improved the jacks and slider controls of the previous model, but still included the disputed Model 4012 filter. In 1977, 2601 v2.0 introduced ARP’s new Model 4072 filter, as well as the orange-over-black design theme of ARP’s other synthesizers. One final version of the 2601, v3.0, was produced in ARP’s final days. Impact The first significant user of the 2600 was Edgar Winter, who connected the keyboard controller of the 2600 to the main unit via a long extension cord, allowing him to wear the synth around his neck like a keytar. Stevie Wonder was an early adopter of the 2600 who had the control panel instructions labelled in Braille. Other early notable users included Pete Townshend, Joe Zawinul, and Herbie Hancock. Sound designer Ben Burtt used an ARP 2600, combined with his own voice, to create the voice of R2-D2 in the Star Wars films. Burtt also used the 2600 to create the sound effects of the Ark of the Covenant in Raiders of the Lost Ark. Software emulations Software companies, such as Arturia and Way Out Ware, have released software emulations for use with modern music equipment, such as MIDI devices and computer sequencers: Arturia ARP 2600 V TimewARP 2600 Cherry Audio CA2600 Hardware re-issues and recreations On January 10, 2020, Korg Inc. of Japan reissued the ARP 2600 as the ARP 2600 FS, a faithful reproduction of the original 1972 gray version. The re-issue adds features, including: the ability to select between the 4012 and 4072 filter types found in the 1970s versions, balanced XLR outputs, MIDI, a basic sequencer / arpeggiator, and a flight case for travel. The keyboard included is based on the original 3620 keyboard which now provides aftertouch. In 2022, Korg introduced a smaller version of the 2600 called the 2600M, which was identical to the FS but 40% smaller. Behringer's 2600 In 2020, Behringer released its own updated variant. In contrast to the original ARP or the versions produced by