AM8109SE JP-8 FILTERS

AMSynths Offer Details

Created
Modified
Price
$268.01  
Seller
 
Region
EU  

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Description

This module is replication of the Low Pass and High Pass Filters from the legendary Roland Jupiter 8. This is an OTA design that Roland first used in the Jupiter 4 in 1980, and then added Q compensation for the Jupiter 8.This is a warm sounding filter with smooth frequency control and a resonance that gradually increases up to self oscillation - a sound very reminiscent of the early 1980's. The original Jupiter 8 filter did not self oscillate because it could distort, but we have trimmed the filter so it does just go into self oscillation. You may need to back off the level of resonance if you do get some distortion. The difference between 2 and 4-pole modes is subtle, with the 2-pole mode providing a more gradual cutoff slope and silky sound. The high pass filter provides a gradual cutoff of low frequencies. The Q compensation ensures the audio signal is retained as the resonance increases, rather than dipping down. This module uses the AS3109 OTA chip in the low pass filter and the AS662 is the high pass filter and resonance circuit. The original design has been updated to use modern components with high quality capacitors in the signal path and filter core. There are front panel sliders for adjusting the Cutoff Frequency and Resonance of the low pass filter, and level control of 3x control voltages (MOD, ENV and KYBD) and 2x audio signal inputs. The high pass cutoff frequency is adjusted using a rotary potentiometer with a Roland 100M control knob.This listing is only for the Amsynths filter as pictured and described. It was bought first hand from Amsynths (UK). It’s excellent but already have too many.Mint condition (like new). Will be packed safely together with ribbon cable and screws.

AMSynths AM8109SE JP-8 filter

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