The ARP 2500 is a

monophonic Monaural or monophonic sound reproduction (often shortened to mono) is sound intended to be heard as if it were emanating from one position. This contrasts with stereophonic sound or ''stereo'', which uses two separate audio channels to reproduc ...

analog

modular synthesizer Modular synthesizers are synthesizers composed of separate modules for different functions. The modules can be connected together by the user to create a patch. The outputs from the modules may include audio signals, analog control voltages, o ...

equipped with a set of sliding matrix switches above each module. These are the primary method of interconnecting modules. It is the first product of

ARP Instruments, Inc. ARP Instruments, Inc. was a Lexington, Massachusetts manufacturer of electronic musical instruments, founded by Alan Robert Pearlman in 1969. It created a popular and commercially successful range of synthesizers throughout the 1970s before de ...

, built from 1970 to 1981.

Features

There are rows of 1/8" '' miniphone'' jacks at the end of each row of matrix switches, to interconnect rows of switches. The main 2500 cabinet can hold 15 modules, and optional wing cabinets can each hold 8. The matrix switch interconnection scheme allow any module's output to connect to any other module's input. This is unlike the patch cords of competitive units from Moog and

Buchla Buchla Electronic Musical Instruments (BEMI) was a manufacturer of synthesizers and unique MIDI controllers. The origins of the company could be found in Buchla & Associates, created in 1963 by synthesizer pioneer Don Buchla of Berkeley, Californi ...

which can obscure control knobs and associated markings, but it has the disadvantage of greater cross-talk. Although the 2500 proved to be a reliable and user-friendly machine, it was not commercially successful, selling approximately 100 units. A collection of the 2500's most popular modules was packaged into a single, non-modular unit as the

ARP 2600 The ARP 2600 is a semi-modular analog subtractive audio synthesizer produced by ARP Instruments, Inc. History Developed by a design team headed by ARP namesake Allen R. Pearlman and engineer Dennis Colin, the ARP 2600 was introduced in 1971 a ...

, leaving out the matrix switching and more esoteric functions.

Notable users and appearances

John Kongos John Theodore Kongos (born 6 August 1945) is a South African-born singer and songwriter of Greek ancestry, best known for his 1971 Top 10 hit single "He's Gonna Step on You Again", on which Happy Mondays based their hit "Step On". His other big ...

first used one at Trident Studios in 1971, then in 1973 he acquired his own - it was used extensively at his Tapestry Studio, on his own recordings as well as

Def Leppard Def Leppard are an English rock band formed in 1976 in Sheffield. Since 1992, the band has consisted of Rick Savage (bass, backing vocals), Joe Elliott (lead vocals), Rick Allen (drums, backing vocals), Phil Collen (guitar, backing vocals), a ...

(

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Mutt Lange A mutt is a mongrel (a dog of unknown ancestry). Mutt may also refer to: People * Mutt, a derogatory term for mixed-race people Nickname * Larry Black (sprinter) (1951-2006), American sprinter * Mutt Carey (1886–1948), New Orleans jazz trumpe ...

Alain Chamfort Alain Chamfort (born Alain Joseph Yves Le Govic; 2 March 1949) is a French singer of Breton origin. Life and career Chamfort was a promising pianist in his youth, and the piano became his instrument of choice. His first band The Dreamers h ...

Tony Visconti Anthony Edward Visconti (born April 24, 1944) is an American record producer, musician and singer. Since the late 1960s, he has worked with an array of performers. His first hit single was T. Rex's " Ride a White Swan" in 1970, the first of man ...

, Ryan Ulyate and many others. The ARP 2500 was extensively used by British producer

David Hentschel David Hentschel (born 18 December 1952) is an English recording engineer, film score composer and music producer who engineered on George Harrison's ''All Things Must Pass'' and Elton John's ''Goodbye Yellow Brick Road'', as well as for such a ...

on recordings such as "

Funeral for a Friend Funeral for a Friend are a Welsh post-hardcore band from Bridgend, formed in 2001 and currently consists of Matthew Davies-Kreye (lead vocals), Kris Coombs-Roberts (guitar, backing vocals), Gavin Burrough (guitar, backing vocals), Darran Smith ...

" from

Elton John Sir Elton Hercules John (born Reginald Kenneth Dwight; 25 March 1947) is a British singer, pianist and composer. Commonly nicknamed the "Rocket Man" after his 1972 hit single of the same name, John has led a commercially successful career a ...

's 1973 album ''

Goodbye Yellow Brick Road ''Goodbye Yellow Brick Road'' is the seventh studio album by English singer-songwriter Elton John, first released on 5 October 1973 as a double LP. The album has sold more than 20 million copies worldwide and is widely regarded as John's magnum ...

''. Jeff Wayne's 1978 multi-platinum selling album ''

War Of the Worlds ''The War of the Worlds'' is a science fiction novel by English author H. G. Wells, first serialised in 1897 by ''Pearson's Magazine'' in the UK and by ''Cosmopolitan (magazine), Cosmopolitan'' magazine in the US. The novel's first appear ...

'' features the ARP 2500, including the sound of Martian speech. In the 1977 motion picture ''

Close Encounters of the Third Kind ''Close Encounters of the Third Kind'' is a 1977 American science fiction film written and directed by Steven Spielberg, starring Richard Dreyfuss, Melinda Dillon, Teri Garr, Bob Balaban, Cary Guffey, and François Truffaut. It tells the story ...

'', a 2500 unit is used to communicate with

aliens Alien primarily refers to: * Alien (law), a person in a country who is not a national of that country ** Enemy alien, the above in times of war * Extraterrestrial life, life which does not originate from Earth ** Specifically, intelligent extrate ...

. The ARP technician sent to install the unit,

Phil Dodds Philip Van Horn Weems Dodds (May 17, 1951 – October 6, 2007), credited as Phil Dodds and Philip Dodds, was an audio engineer who appeared in the 1977 motion picture ''Close Encounters of the Third Kind''. As ARP Instruments, Inc.'s Vice Presiden ...

, was cast as the musician. The unit featured in the film consisted of a fully loaded main unit, two fully loaded wing cabinets and dual keyboards in a custom case. It has been used by artists such as

Aphex Twin Richard David James (born 18 August 1971), best known as Aphex Twin, is an Irish-born British musician, composer and DJ. He is known for his idiosyncratic work in electronic music, electronic styles such as techno, ambient music, ambient, and jun ...

David Bowie David Robert Jones (8 January 194710 January 2016), known professionally as David Bowie ( ), was an English singer-songwriter and actor. A leading figure in the music industry, he is regarded as one of the most influential musicians of the ...

Vince Clarke Vincent John Martin (born 3 July 1960), known professionally as Vince Clarke, is an English synth-pop musician and songwriter. Clarke has been the main composer and musician of the band Erasure since its inception in 1985, and was previously ...

Faust Faust is the protagonist of a classic German legend based on the historical Johann Georg Faust ( 1480–1540). The erudite Faust is highly successful yet dissatisfied with his life, which leads him to make a pact with the Devil at a crossroads ...

John Frusciante John Anthony Frusciante (; born March 5, 1970) is an American musician, best known as the guitarist for the Red Hot Chili Peppers across three stints since 1988. He has released 11 solo albums and 7 EPs, ranging in style from acoustic guitar to e ...

Jean Michel Jarre Jean-Michel André Jarre (; born 24 August 1948) is a French composer, performer and record producer. He is a pioneer in the electronic, ambient and new-age genres, and is known for organising outdoor spectacles featuring his music, accompanie ...

Cevin Key Kevin William Crompton (born February 13, 1961), known professionally as cEvin Key, is a Canadian musician, songwriter, producer, and composer. He is best known as a member of the industrial music group Skinny Puppy, which he co-founded in 1982 ...

Kraftwerk Kraftwerk (, "power station") is a German band formed in Düsseldorf in 1970 by Ralf Hütter and Florian Schneider. Widely considered innovators and pioneers of electronic music, Kraftwerk were among the first successful acts to popularize the ...

Jimmy Page James Patrick Page (born 9 January 1944) is an English musician who achieved international success as the guitarist and founder of the rock band Led Zeppelin. Page is prolific in creating guitar riffs. His style involves various alternative ...

Vangelis Evangelos Odysseas Papathanassiou ( el, Ευάγγελος Οδυσσέας Παπαθανασίου ; 29 March 1943 – 17 May 2022), known professionally as Vangelis ( ; el, Βαγγέλης, links=no ), was a Greek composer and arranger of ...

and

The Who The Who are an English rock band formed in London in 1964. Their classic lineup consisted of lead singer Roger Daltrey, guitarist and singer Pete Townshend, bass guitarist and singer John Entwistle, and drummer Keith Moon. They are considered ...

. The composer

Éliane Radigue Éliane Radigue (born January 24, 1932) is a French electronic music composer. She began working in the 1950s and her first compositions were presented in the late 1960s. Until 2000 her work was almost exclusively created with the ARP 2500 modul ...

has worked almost exclusively with the 2500.

References

External links

Vintage Synth Explorer
{{ARP Instruments ARP synthesizers Analog synthesizers Modular synthesizers Monophonic synthesizers