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Electro Harmonix Mini-synthesizer

 

 

 

 

Electro harmonix Mini-synthesizer

infoCountry: USA
Weight: n/a
Dimensions: n/a
audio demotrend price : 400€
manual manual video comments

Electro harmonix Mini-Synthesizer (1980)
Model EH 0400

 

Basic monophonic synthesizer with a superb compact design and a membrane keyboard, similar concept found on EDP Wasp.

logo
tech

info KEYBOARD portable 25 membrane keys with no velocity but the IMPACT SENSOR circuit which opens filter to major pressure.
Synth bottom is made out of cheap cardboard which is a total shame.
The EHX synth features 7 sliders potentiometers, 6 two-ways switches and a built-in audio speaker.

Back panel
terminal connectors:
- audio signal output
- master tuning.

ac Power supply is a 9V external PSU or 2 x 9V batteries.





edit VOICE monophonic single analog oscillator structure.
A voice is composed by a 1 VCO pulse + 1 suboscillator (1 octave lower) which is obtained from divider structure, while octave function switches the VCO to 2 octaves below.




tech

minisynthesizer



edit
FILTER the VCF is resonant (Q switch) and the 2x switch steps the filters 1 octave up.


VCF





edit EFFECT
VCF phase function activates a phase shifting on the sound.


VCF

 


edit
ENVELOPE a single EG control on the cutoff filter: the START and STOP sliders set the lower and higher frequencies range at key down and up.

 



edit
LFO a very basic modulation on the VCO pulse rectangular width (PWM).


width




edit MAINTENANCE
after some pressures (and some years) the keyboard usually has some issues: it is necessary to refurbish the contacts using some homemade tricks or directly redisigning a new cardboard.

ehx minisynthesizer repair



 

edit RELATED FAMILY:

minisynthesizer 2

Mini-synthesizer Mk2 - with red script : adds an analog delay feature and an external filtering on the VCF, but it is the same machine.

Mini synthesizer APP Mini synthesizer APP (ios / android) - 2016. Virtual version with some new features VIDEO




demo AUDIO DEMO

demo filter test1
demo filter mode2
demo delay xperiment
demo phasing on attack
demo phasing on delay
demo want to share some EHX minisynthesizer sounds? UPLOAD

 



videoVIDEO CLIP SELECTION

Electro-Harmonix Mini-Synthesizer Model 0410 with Echo Electro-Harmonix Mini-Synthesizer Analog Synth The wall overdub
Model 0410 with Echo Analog Synth The wall overdub

 

 

electro harmonix micro synthesizer




manual
MINISYNTHESIZER MANUAL

 

 

 




manual
APPROXIMATIVE SCHEMATICS

 

 

 




manual
PATCH SHEET PRESETS

 

 

 

audio demo
demo original brochure

 

 

mike matthews
demodemoM.Matthews

 

 

Electro Harmonix Mini-synthesizer FOR SALE

Electro Harmonix Mini-synthesizer EH0400 for sale
CHECK OUT EBAY OFFERS


 

 

motherboard logo circuit eh0400


manual

-analog
-design

manual

- reliability
-limited sound
-vintage expensive

comment
nice, but...


REVIEW " love the design, nice vintage object! bad news: sound is not so compelling, unplayable keyboard and membranes maintenance are major drawbacks."

 
Electro harmonix Mini-synthesizer


COMMENTS

 

 

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Electro harmonix Mini-synthesizer 2 out of 5 based on 11 ratings. price €300