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FILTER 8 

MULTIMODE FILTER/8-PHASE OSCILLATOR 

 

 

 

SPECIFICATIONS 

MODULE FORMAT 

Doepfer A-100 ‘Eurorack’ compatible module 
3 U, 12 HP, 30 mm deep (inc. power cable) 
Milled 2 mm aluminium front panel with non-
erasable graphics 

MAXIMUM CURRENT DRAW 

+12 V: 75 mA 
−12 V: 75 mA 

POWER PROTECTION 

Reverse polarity (MOSFET) 

I/O IMPEDANCE 

All inputs: 100 k

 

All outputs: 0 

 (compensated) 

OUTER DIMENSIONS (H X W X D) 

128.5 x 60.6 x 43 mm 

MASS 

Module: 175 g 
Including packaging and accessories: 250 g 

SUPPORT 

As  all Joranalogue  Audio Design products, 
Filter 8  is designed, manufactured and tested 
with the highest standards, to provide the 
performance and reliability music professionals 
expect. 

In case your module isn’t functioning as it should, 
make sure to check your Eurorack power supply 
and all connections first. 

If the problem persists, contact your dealer or 
send an email to support@joranalogue.com. 
Please mention your serial number, which can be 
found on the product card or on the module’s 
rear side. 

REVISION  HISTORY 

Revision D: resolved linear FM ‘freeze’ issue which 
occurred when voltages of  10 V were 
applied to the LFM CV. 

Revision C: initial release. 

 

Summary of Contents for FILTER 8

Page 1: ...urate frequency tracking over at least 5 octaves At sub audio frequencies Filter 8 can function as an 8 output voltage controlled slew modifier or 8 phase low frequency oscillator LFO Simultaneous exp...

Page 2: ...filter frequency to be emphasised Filter 8 s design includes an innovative resonance circuit by increasing this parameter all outputs will start to resonate at the filter frequency without any low fr...

Page 3: ...ault each output is at unity gain with respect to the signal inputs This is very useful when processing audio or CV However when Filter 8 is used in oscillator mode all outputs resonate at different a...

Page 4: ...Note that DC offset voltages may be visible at the outputs especially at extremely low frequencies This is a result of the circuit topology and is considered normal behaviour The image below illustrat...

Page 5: ...ables the input Filter 8 s hold input is uniquely designed to be driven reliably even from weak slow bipolar signals It features Schmitt action with a 2 V low and 3 V high logic threshold 13 PING INPU...

Page 6: ...signal should switch between 0 V and a precision 3 V source toggled automatically or by hand Using a dedicated trimming tool or standard 2 5 mm flat screwdriver adjust the trimmer until the interval b...

Page 7: ...SPONSE BLENDING Filter 8 s multimode outputs are created using pole mixing combining the input and lowpass outputs signals in precise ratios and polarities This technique can be recreated externally u...

Page 8: ...SUPPORT As all Joranalogue Audio Design products Filter 8 is designed manufactured and tested with the highest standards to provide the performance and reliability music professionals expect In case...

Page 9: ...ivKid Wilson Bj rn Jauss Boris Uytterhaegen Gregory Delabelle Jan D Hooghe Jens Van Daele Lieven Stockx Sebastiaan Tulkens Everyone at Wired Electronics Filter 8 User Manual version 2018 10 30 21st Ce...

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