Metasonix RK4 Filter / VCO

€428.00 *
Net price: €359.66

Prices incl. VAT plus shipping costs

Pre-order - Delivery date t.b.d.

  • 170017
  • 40
While being used as an oscillator, the RK4 is controlled via its pitch CV input (Hz / v). For... more
Product information "Metasonix RK4 Filter / VCO"

The RK4 is a compact version of the unfortunately no longer available R-54 Supermodule. Like the older brother, it can be used as an oscillator and bandpass filter. During VCO operation, the RK4 emits an exceptionally clean sine wave, thanks its triode-pentode which was placed in a Wien-bridge circuit. By turning a potentiometer, the sine can be morphed into a square wave. The frequency response ranges, in both VCO and VCF operation, from 20 Hz to 2 kHz. Pitch respectively cutoff can be controlled via a knob and a Hz / v connector. An audio input plus level potentiometers complete the module.

In use, the RK4 shines with beefy, warm tube sound. Frequency modulations lead to fierce, yet charming results. Utilized as a filter, the circuit is a dream as well. The bandpass is wide and cuts off frequencies very smoothly. Hi resonance values produce shrill screams. – A truly unique module with tons of character!

While being used as an oscillator, the RK4 is controlled via its pitch CV input (Hz / v). For tuning adjustments, there is a potentiometer. The resonance knob can be employed to morph the waveform from sine to square. Another potentiometer edits the output volume.

For utilizing the RK4 as a bandpass filter, an audio input with level control was implemented in the module. Its tuning potentiometer sets the cutoff frequency, the pitch CV input can be used for modulations.

External videos:

HE: 3
TE: 8
Depth: 40
Power consumption +12V: 400
Power consumption -12V: 10
Related links to "Metasonix RK4 Filter / VCO"
"Metasonix RK4 Filter / VCO"
RK4 Filter/VCO @Metasonix
Here is the information available on the brand...... more
Metasonix

As Eric Barbour lost his day-job by the late 1990s, he decided to apply his vast knowledge and expertise in vacuum tubes to make noise making instruments. By now he has earned a reputation of creating some of the most nasty sounding instruments. Not for the faint of heart.

180340_1 Metasonix RK6 Resonant Lowpass Filter
€478.00 *
Net price: €401.68
170016_1 Metasonix RK3 Ringer / Shaper
€428.00 *
Net price: €359.66
160110_1 Metasonix RK2 XS-VCA
€428.00 *
Net price: €359.66
200085_1 Befaco - Percall
€248.00 *
Net price: €208.40
200053_1 Metasonix RK7 VCO
€658.00 *
Net price: €552.94
130389_1 Verbos Electronics - Harmonic Oscillator
€699.00 *
Net price: €587.39
190280_1 Flame C-3 MkII Knob Recorder
€169.00 *
Net price: €142.02
160267_1 Metasonix RKP
€409.00 *
Net price: €343.70
130502_1 100x nylon washers 3.2mm
€3.00 *
Net price: €2.52
120078_1 Doepfer A-106-5 12dB Filter (SEM)
From €80.00 *
Net price: €67.23
170365_1 WMD - Soft Start
€35.00 *
Net price: €29.41
180093_1 Worng Electronics - LRMSMSLR
€118.00 *
Net price: €99.16
180222_1 Befaco - Burst
€185.00 *
Net price: €155.46
200053_1 Metasonix RK7 VCO
€658.00 *
Net price: €552.94
170016_1 Metasonix RK3 Ringer / Shaper
€428.00 *
Net price: €359.66
NEW STUFF
210553_1 Befaco - Noise Plethora
€350.00 *
Net price: €294.12
120869_1 Make Noise - Maths 2
€318.00 *
Net price: €267.23
160110_1 Metasonix RK2 XS-VCA
€428.00 *
Net price: €359.66
170314_1 Befaco - Hexmix
€475.00 *
Net price: €399.16
170298_1 Noise Engineering - Manis Iteritas
€389.00 *
Net price: €326.89
HOT SHIT
NEW STUFF
210547_1 Joranalogue - Orbit 3
€249.00 *
Net price: €209.24
190680_1 Verbos Electronics - Foundation Oscillator
€468.00 *
Net price: €393.28
150259_1 Noise Engineering - Loquelic Iteritas
€379.00 *
Net price: €318.49
130288_1 Frequency Central - XVCO 2
€198.00 *
Net price: €166.39
160259_1 Malekko - Varigate 8+
€548.00 *
Net price: €460.50
NEW STUFF
210571_1 Instruo - Neóni
€448.00 *
Net price: €376.47
210173_1 British Noise Electronics - Grit
€320.00 *
Net price: €268.91
200122_1 Frap Tools - Brenso
€639.00 *
Net price: €536.97
170070_1 Noise Engineering - Cursus Iteritas
€368.00 *
Net price: €309.24
190683_1 Verbos Electronics - Amp + Tone
€339.00 *
Net price: €284.87
170176_1 Livestock Electronics - Bang
€248.00 *
Net price: €208.40
120193_1 ALM Busy Circuits - Pamela's New Workout
€288.00 *
Net price: €242.02
210424_1 WMD - Kraken
€288.00 *
Net price: €242.02
210064_1 Jomox - ModBase 09 MKII Eurorack
€369.00 *
Net price: €310.08
200179_1 Intellijel Designs - Bifold
€235.00 *
Net price: €197.48
170234_1 Eowave - Titan discrete oscillator
€119.00 *
Net price: €100.00
150214_1 Mannequins - Mangrove
€328.00 *
Net price: €275.63
160289_1 Malekko - Voltage Block
€349.00 *
Net price: €293.28
190053_1 Ritual Electronics - Altar
€260.00 *
Net price: €218.49
170315_1 Befaco - Hexpander
€355.00 *
Net price: €298.32
210780_1 Erica Synths - Black Filter BUNDLE
€388.00 * €455.00 *
Net price: €326.05
120822_1 Malekko - Richter Oscillator 2
€279.00 *
Net price: €234.45
210160_1 Noise Engineering - Ruina Versio
€345.00 *
Net price: €289.92
160100_1 TouellSkouarn - Skorn da Bask (Model of 2017)
€365.00 *
Net price: €306.72
200027_1 Bubblesound - VCO b
€224.00 *
Net price: €188.24
190640_1 Joranalogue - Generate 3
€349.00 *
Net price: €293.28
150079_1 Befaco - Even VCO
€229.00 *
Net price: €192.44
190429_1 Electrosmith - 3340 VCO
€158.00 *
Net price: €132.77
190388_1 System 80 - 820
€239.00 *
Net price: €200.84
130295_1 Make Noise STO
€219.00 *
Net price: €184.03
130286_1 Frequency Central - System X Envelope Black
€128.00 *
Net price: €107.56
190022_1 Frap Tools - Falistri
€399.00 *
Net price: €335.29
Viewed