CMS 4012CX
A voltage-controlled filter module for modular synthesizers. It has two operating modes and is built with discrete transistors.
Overview
The CMS 4012CX is a voltage-controlled filter (VCF) module made by CMS (Discrete Synthesizers). It is a standard component in the CMS 2607 synthesizer. It belongs to the 4000 series sub-module design, which keeps it compatible with the original ARP 2600. The filter is described as "famous." It is noted for improved sound while staying faithful to the early ARP 2600 filter design.
Design
The 4012CX has two operating modes, CMS and ARP. In ARP mode it keeps the original factory 4012 circuit. CMS mode uses the CMS 9004 dual-mode filter. A High Pass / Pseudo-notch output changes with the mode switch setting. All audio processing runs through discrete, hand-selected, low-noise, matched transistors. The module uses reliable thru-hole construction and follows the 4000 series sub-module standard, so it is interchangeable with the original ARP 2600.
Specifications
| Product Type | Filter (specifically, a voltage-controlled filter module) |
| Manufacturer | CMS (Discrete Synthesizers) |
| Product Name | CMS 4012 CX filter |
| Module Series | 4000 series sub-module design |
| Compatibility | Interchangeable with the original ARP 2600 |
| Filter Modes | CMS mode (uses CMS 9004 dual mode filter), ARP mode (original 4012 circuit) |
| Outputs | High Pass / Pseudo-notch output depending on mode |
| Construction | Thru-hole |
| Audio Processing | Discrete, hand selected, low noise, matched transistors |
Context
The CMS 4012CX is a core component of the CMS 2607 synthesizer. It is part of a modular system that stays compatible with the ARP 2600 through the shared 4000 series sub-module architecture.
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