STAGE
ONE UPGRADES / MODIFICATIONS FOR THE ARP 2600
These
upgrades are internal audio improvements to the circuitry
of
the 2600
AUDIO
PATH UPGRADE PACKAGE - (ALL MODELS) - 349.00
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!
FILTER
MODULE UPGRADE - (4072) - (LATER MODELS) - 75.00
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.
MOOG
STYLE FILTER MODULE - 4012cx - (ALL MODELS) - 279.00
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.
VCA
MODULE UPGRADE - (4019) - (LATER MODELS) - 59.00
If your VCA module is unencapsulated, 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 unencapsulated
replacement modules are available, see submodules page,
model 4019cx.
POWER
SUPPLY UPGRADE - (ALL MODELS) - 250.00
The
power supply in your 2600 is about 20 to 30 years old. Chances
are that your power supply is not up to spec. This can result
in excessive noise, ripple, and instability. This mod replaces
your unit with a high power, highly stable, military spec power
unit with remote sense regulation. The overall sound quality
and oscillator purity are noticeably improved. Rebuilt ARP units
are available for 125.00 (50.00 core charge).
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 6 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.
