Estec Megafour – 4 channel filter & gate unit

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ESTEC Megafour – 4 channel filtering / gate unit

4 channels of:
  • tunable analogue high pass & low pass filters
  • gate with "soft" circuit, hold function & sidechain insert
The MEGAFOUR is a 4 channel gate + the LP/HP filter set (the latter circuit is taken from Estec's TwinEQ). The filters can be used in the audio path or in the gate sidechain, to finetune the gate's behavior. This filter design was initially developed for Michael Cretu's (Enigma) custom console. Cretu wanted a variation of the Harrison 32c console filter, and this is a tweak on that circuit design: The filter's curves are beautifully tuned, with a little resonant bump around the cut off frequency to give them a more solid "grip".

Filter application examples:
  • mixer channel inserts: 4 tunable LP + HP filter sets to augment fixed console filters (think of Harrison's 832c filter box – free gates on top)
  • "spectral panning" – cut a little high end on the right channel to align a signal to the left with very little energy shift
  • use the highcut's resonant bump to retain clarity & definition while removing excessive high frequency content
  • tune the gates for exact envelope triggering  

Gate features
  • Estec offers the most extreme time constants in the industry – attack and hold settings: 0.01 (!) to 500 ms – release up to 10 sec (!)
  • "soft" circuit smoothes the envelope, i.e. it can be tuned to anything from lasersharp cut off to the most musical fades
  • sidechain inserts! trigger the gate circuits with anything
  • filters can be switched into the sidechain – finetune what the gate reacts to
  • trigger outputs available as a sub25 output – use the detection circuit to trigger CV equipment (modular synthesizer integration!)
  • gate + filter can be switched on or of separately
Consider that Harrison's 832c eight channel filter box comes at $2400, i.e. $300 per channel. The Megafour is a great alternative filter box to add to your console – with fantastic gates on top. If you have a desk with a fixed 50, 60 or 80 Hz Lowcut, this will change your life.  

Technically fully functional. Cosmetic condition: faceplate, controls connector panel are excellent, top and bottom have scratches from rack mounting. All inputs / outputs / inserts: jack.   

Note: As far as I know this unit is NOT switchable to 110V!


About ESTEC:
ESTEC is a German boutique manufacturer based in Munich, comparable to ADT & Zaehl in that it started building custom mixing consoles and subsequently moved into offering small series of outboard versions of its desk circuits. The brainchild of Peter Schneid, ESTEC built custom consoles and circuits for the likes of Michael Cretu (Enigma) and Frank Farian (Boney M). Today they mostly build specialized broadcasting equipment.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.

Product Specs

Excellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.learn more
Brand Estec
Model Megafour
Categories Equalizers
Made In Germany

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This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.
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Berlin, Germany
Joined: Apr 2016

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