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The E440 is based on the 5U MOTM-440 filter with additional features such as separate outputs for each filter slope and an input Drive control.You have probably heard of the SSM2040 filter chip, used in the Prophet-5 Rev 2, Voyetra 8, and others. Although short-lived, the SSM2040 filter had a unique sound different from a Moog, ARP, or other 4-pole lowpass filters. Why? The design used a clever discrete OTA gain cell that responds beautifully as additional gain is added to the input signal.The E440 provides three simultaneous filter slopes: 2 Pole (12dB), 3 Pole (18dB), and 4 Pole (24dB) for selective timbral shaping. Voltage control of filter resonance (rarely found on other filters) is also available.SPECSHeight 3U (128.5mm)Width 14hp (70.8mm)Depth 32mmPower 14-pin Eurorack (23mA from +12V, 12mA from -12V)CV input range 10Vpp (-5V to +5V), DC to 10KHz(Res CV range is 0V-5V)Audio Input 50K nominal input impedance, 100mv to 14VppAudio Output 14Vpp (-7V to +7V), 20Hz to 18KHz frequency rangeJumper Options JP1: Bass boost enhancement (OFF/ON)PANEL CONTROLSResonance Sets the initial filter resonanceFrequency Sets the initial filter frequencyFM 1 / FM 2 Attenuator for the FM CV inputsDrive Increases the gain of the input signalINPUTS AND OUTPUTS1V/Oct 1 volt per octave control for the initial filter frequencyFM 1 / FM 2 Filter frequency modulation inputsRes CV Resonance modulation inputAudio In Signal input for the filter2/3/4 Pole Out Audio outputs for various filter slopes (12dB/18dB/24dB)
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Synthesis Technology E440 Discrete OTA Eurorack VCF Module
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