ETI International 4600

images via this auction. via Adam

There are some fantastic shots of the inside and outside in this set so be sure to check them out. Click on the All Sizes link on the top of each image for the full detail.


"This is a very rare ETI 4600 synthesizer and would suit a synth enthusiast or collector.
All knobs/switches present and faceplate mint!!
Powerful Analog machine 4 vcos (and the 4th has two outputs) !!! A matrix patch bay allows for incredible routing options, I’ve used this along side an ems synthi and it gives it a good run for its money. This thing is ultra fat and makes the craziest sound effects, mega sci-fi sounds with its inbuilt spring reverb. Absolutely unreal for sound effects!!

Electronically it has been professionally put together, I am told by the previous owner that the guys from fairlight built it from kit form. The cabinet isn’t the best and needs a tidy up or even nicer would be to rebuild it with an attractive timber. It comes with cabinet construction diagrams in the manual. The keyboard is missing some keys, but you can use generic organ keyboards with this machine (or what I was going to do is get rid of the keyboard and make a new cabinet as an expander module without keys).

These don’t show up often at all. Parts are still available and the manual shows in great detail how to build it, Do some research on this synth and you will find there is a lot you can do with it. Mod it or expand it etc. link

I recently did a full test on the synth with the following results:
Oscillator 1 - All Range settings, Tune, Free run, Shape and All waveforms tested and working.
Oscillator 2 - All Range settings, Tune, Free run, Shape and All waveforms tested and working.
Oscillator 3 - Intermittent, was working and now isn’t.
Oscillator 4 - All Range settings, Tune, Free run, Shape and All waveforms tested and working.
Oscillator 4, Second output - All waveforms, including noise selection and Controller tested and working.
Noise generator - Pink and white tested and working.
Mixer 1 - Tested and working.
Mixer 2 - Tested and working.
Mixer 3 - Tested and working.
Mixer 4 - Tested and working.
Mixer 5 - Tested and working.
Filter 1 - Tested and working.
Filter 2 - Tested and working.
Joystick - Tested and working in both planes, range pot also working.
Keyboard Control – Sweep, Glide, Transient, Modulation and Tune tested and working.
Keyboard – Tested but not tracking 100% (needs calibrating)
Equalizer – All five bands tested and working.
Reverb - Tested and working.
Main Output - Tested and working, no crackle upon turning volume pot.
Headphone Output – Works, but is very crackly upon turning volume pot.
External Inputs 1 and 2 - Tested and working.
Amplifiers 1 and 2 - Tested and working.
Controller – Level is working but I’m not able to get any change with modulation.
Envelope control - Tested and working.
Transient 1 - Tested and working.
Transient 2 - Tested and working.

Its heavy !! weighs 20kg unpacked. Allow 4kg for packing (I will pack it very well)
The synth could be sent without keyboard and cabinet to reduce weight if seller prefers
Approximate Size (packed) 105x45x50cm"