I love all sorts of filters. These are the ones I have collected over the years. I'm currently in the process of selling most of them.
Jomox M-Resonator
Weird and wonderfull
Jomox T-Resonator
Amzing effects!
Schipmann Ebbe und Flut
The King
Frostwave Resonator
Nice MS20 Filter
Frostwave Funk-a-Duck
Funk in a box
Frostwave Sonic Alienator
A digital decimator and a filter in one box
Akai MFC42
Nice and cheap (sold)
Electrix Filterfactory
Good filter
Mutron III
Old envelope filter
MFB Filterbox
Tempo based filter (for sale)
EMMA DiscomBOBulator
The best auto-wah (for sale)
Ibanez AF201
Almost the best auto-wah
Maxon AF9
Same as the Ibanez AF9, also almost the best auto-wah
Electro-Harmonix Q-Tron+
Nice and new
Mutron Wah
Great on Rhodes
Snarling Dogs Whine-O
Great on Clavinet
Modtone Funk Filter Enveloper
Cool autowah
Filltree
DIY and dirty
Boss FT-2
Good small box
MAM Warp 9
A German one (sold)
MXR M-188 Bass Auto Q
Phatt! (for sale)
Peavey Spectrum Filter
Hard to find (sold)
Chunk Systems Agent 00Funk
Funky!
Mutronics Mutator
Expensive
Moog MF-101
The classic
Korg Monotron
Cheap monosynth with MS20 filter and audio input!
Sherman Filterbank 2
Everyone has one
Rodec Sherman Restyler
Nice for DJ filtering
Waldorf 4-pole
Quality from Waldorf
Vermona Action Filter II Plus
Nice looking (for sale)
Electro Harmonix Bi-Filter
Out of production (for sale)
Analogue Systems FB3
Parallel filters (for sale)
Electrix Filterqueen
Small brother of the other Electrix
Waldorf X-Pole
Analog Waldorf goodness! (sold)
Studio Electronics Modmax Filter
Phatt (for sale)
Vermona Dual Analog Filter (DAF-1)
With LFO and enveloppe follower (for sale)
Vermona Filter Lancet
Just introduced (for sale)
Wasp Drive
Nice small filter (for sale)
M-Z3R0 - K-Filter
Cool filter
Eowave Sci-fibug
A french filter
Allen & Heath Xone VF1
With tubes! (sold)
KOMA FT201
New kid on the block
Anyware Megapole lite
Hard to find (for sale)
Tidal Quad
Only 12 or so where made, and I have one! (sold)
SubDecay Prometheus DLX
Nice stompbox
Vermona Cross Filter
Big brother of the Action Filter (sold)
Eowave Filterbug
Another french filter
Eowave Filterbug
Early mono version
Omnitronic DMF2
Cheap filter
Jomox Moonwind
New (for sale)
Anyware Megapole
Hard to find (sold)
Maestro Filter Sample/Hold FSH-1 Clone
Made for me by Jimmy Behan
Analogue Solutions Phobos Filtered Coffee
Another MS20 Clone
AnalogLab XPass Filter
Hard to find (for sale)
Oakley Filtrex II
DIY Filter
Mode Machines F-106
Juno clone
SMS Analogue Modular Synthesizer Dual VCF
Part of a modular synth (for sale)
Iron Ether Xerograph Deluxe
A boutique effect
Behringer FM600
Cheap and digital
Z.Cat Step Filter
Relatively cheap
Mode Machines MW-01 Wasp Filter
New edition
Kenny's Death
Cool fuzz filter
Do The Weasel Stomp!
Systech Harmonic Energizer Clone
J Evermand LoFi Filter
LoFi goodness
Hilltree MS20 Clone Filter
A weird MS20 clone
Snazzy FX Tracer City
Hard to find (for sale)
Robot Factory PhoTron Filter
The ultimate MS20 Clone (for sale)
Robot Factory Hydra III
Only one was made, and it's mine! (for sale)
Moog Minifooger Drive
New Moog filter
Vestax DWG-X1
Small exotic filter
Strat-1 OTA Filter
From Romania
Strat-1 Wasp Filter
From Romania
FrankenMusic Wasp Filter
Another Wasp clone
Waldorf 2-pole Analog Filer
The newest from Waldorf
Erica Synth Acidbox
Polivoks Clone (for sale)
Blue Lantern Modules Polivoks Filter
Anther polivoks Clone (for sale)
Blue Lantern Modules SSM2164 Mankato Filter
Anther cool filter (for sale)
Tailor Made Super Tone Control
Made for me by Marcel!
Tailor Made Moog Filter clone
Also made by Marcel!
X1L3 Chimeara
Filter, delay, distortion. Phat!
Recovery Effects Dead Session
Double filter
Retro Mechanical Labs - Jekyll & Hide
New retro design
Sonuus Wahoo
Super Wah/filter
Dreadbox Epsilon
Great mix between distortion and filter
Polivoks Filter Clone
Made in Russia
Erica Synt Acidbox II
More Polivoks goodness (for sale)
MacBeth Moroco
Yes! (sold)
Below are the filters I'm still looking for.
Euterpe Synthesizers Laboratories Vertice
Expensive...
Van Daal Electronics Wobble Filter
MS-20 variation...
Metasonix TM-6
Discontinued
Nio Analog Iotine Core
Expensive...
Reliquary Dual Analogue Filter
Iron Ether Xerograph
Dreadbox Lamda
Sebatron Copernicus
Ekdahl Moisturizer
AVP Synth PolyRhythm
Mode Machines OMF-1
Korg KF-1
Dwarfcraft Hapiness
Dwarfcraft Arf
Warm Star Shape Shifter Mountain