STAGE
ONE UPGRADES / MODIFICATIONS FOR THE ARP 2600
These
upgrades are internal audio improvements to the circuitry
of
the 2600.
Listed in order of popularity:
POWER SUPPLY REBUILD - (ALL MODELS) - 169.00
The power supply in your 2600 is about 30 to 40 years old. Certain components in the ARP 2600 power supply have a shelf life / working life of 20 years maximum. If your power supply has not been serviced in the last 20 years, chances are your power supply is not up to spec. This can result in excessive noise, ripple, and instability. Your power supply is removed. All critical components are professionally replaced. Stability and load are tested using factory specs. Rebuilt ARP power supplies are available from CMS but we require the old power supply in exchange.
AUDIO
PATH UPGRADE PACKAGE - (ALL MODELS) - 379.00
This
mod replaces all gain stages in the 2600 console with audiophile
grade components for crystal-clear highs and a deep low
end,
while still maintaining the distinctive character of the 2600.
Upgraded sections include: lag processor, voltage processors,
reverb stages, preamp, VCF mixer, output mixer, output
buffers,
etc. We also fix the annoying VCA thump. Noise in the reverb
section is reduced by 35%. Filter headroom is increased
by a factor of 2! Stability and sound improvement guaranteed.
Later model 2600s (almost all wood / tolex 2600s) use inferior
sounding gain stages that severely impede the true sound
of
your 2600. Earlier 2600's (Blue Marvins and Gray Meanies) use "high
slew rate" chips
that sound much clearer. Restore
your 2600 back to the specs that the original ARP engineers
intended! Don't
be fooled by imitations from "noob techs" or DIY attempts.
If the Audio Path Upgrade is not performed correctly, it can
become
unstable
and lead to high frequency self oscillation of all the amplifier
sections!
17 INCH REVERB TANK - (ALL MODELS) - 89.00
Ever wonder why later model 2600s have such a lame reverb? Later model 2600s use smaller reverb tanks with a shorter delay time than earlier 2600s made by ARP. The only reason I can find for this change is economic. Our brand new reverb tanks use 3 springs, counter wound and placed in parallel for a rich, full sound. This mod restores your reverb sound back to the original "Blue Marvin / Gray Meanie" configuration.
MOOG
STYLE FILTER MODULE - 4012cx - (ALL MODELS) - 329.00
The
4012 filter was used from 1971 (blue Marvin) to the middle of
1976. If your 2600 is a gray face, It probably utilizes the
4012 module. The 4012 is a ladder type filter using discrete
transistors. The original 4012 made by ARP is prone to instability.
The 4012 replacement filter by CMS is guaranteed stable yet
uses the exact circuit that ARP used. Better quality components
and personal attention to craftsmanship yield a filter of superior
sonic characteristics! See the Sub-module
section for more info.
FILTER MODULE UPGRADE - (4072) - (LATER MODELS) - 79.00
All later ARP filters (after 1975) have a cutoff frequency limit of 11 kHz. This mod upgrades the cutoff frequency range from 11 kHz to 28 kHz. We also upgrade the filter output amp and control summing amp. This is a necessity for all un-encapsulated filters. A cost effective alternative to a 4012 module.
VCA MODULE UPGRADE - (4019) - (LATER MODELS) - 89.00
If your VCA module is un-encapsulated, we can give it crystal clear highs and a deep low end. Also provides lower distortion and a faster slew-rate. If you have an encapsulated ARP VCA, this upgrade is not available, but improved un-encapsulated replacement modules are available, see sub-modules page, model 4019cx.
