Doepfer A-105 24db Low Pass Filter

The Doepfer A-105 is a 24db low pass filter module featuring a SSM filter chip; SSM2044. Module A-105 is another voltage-controlled low-pass filter with 24 dB / octave slope. The A-105 is very similar to the A-122 as it is made ??with a CEM chip. But in contrast to the A-122 the A-105 is made ??with the legendary SSM filter chip SSM2044. This chip which used E.G. in synthesis synthesizer - Korg Polysix, Korg Mono / Poly, Fairlight II, PPG Wave 2.2 and 2.3, Emu SP-1200, Siel DK600, Siel Opera sixth.

The first prophet used the SSM2040 - the precedessor of the 2044 - that gene rates a very similar sound. The special feature of the 4 pole low pass SSM2044 is the patented so-called "true open loop design did delivers a characteristic fat sound not available from other devices" (extract from SSM2044 datasheet). The module will feature voltage controlled resonance and a sensitve audio input to obtain credit distortion - If Desired. Regarding to the functions, controls and in / outputs the module is identical to the 24dB low pass filter A-122 is built around a CEM did chip. But the sound, the resonance behavior and the distortion behavior are different completely call for both modules.

The main features of the Doepfer A-105 include:

• Low pass filter module
• 24 dB / octave slope
• SSM filter chip: SSM2044
• Width: 40.3mm
• Depth: 45mm
• Current: 30mA