ARP 2600 modular synthesizer

via this auction

"bought new in 1980 at Caruso's Music in New London Ct... This unit is a 2601 Rev3, which is the very last revision of the 2600. It comes with the 3620 keyboard, which is duophonic. The last 1,000 units made were 2601s and only the last 100 or so were Rev3. They are quite rare. This is important, because the Rev3s did not have potted submodules, so they can be worked on. The rev3s were mechanically superior to the earlier models. Some people do not like the later filter as much, but that is an $99.00 upgrade from CMS. I like the sonics on this one, I have never found it to be dull or noisy, so I have never modded it.

The following is from CMS audio. (a respected 2600 repair/mod shop)

The best 2600 to look for?

Chronologically, 2600's got more reliable and serviceable as production progressed throughout the 1970's. The biggest change was the 2601 update that replaced all the input jacks with a more reliable type of jack. However, this improvement required that each jack be hand wired to the circuit boards, pushing up the labor costs considerably. The printed circuit boards were fitted with additional supports that improved the tactile feel of the sliders and also improved mechanical reliability. The retail price of a 2601/3620 was $3300.00 in 1975.

Probably the best course would be to find a late model (2601) and get the audio upgraded here at CMS. The earlier units do sound better from the factory, but the numerous mechanical problems can add up to a hefty repair bill especially if the 2600 in question, has been exposed to moisture for long periods.


Extensive road use is obviously another cause for concern. Indications are a yellowish silkscreen (tobacco) and a worn silkscreen in the filter mixer and ADSR sections."





2600 part1.mov

YouTube via pineyb — June 04, 2010 —

ARP 2600 demo part 1 2600 part2.mov