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Siel Kiwi

Analog polysynth (1983)

Siel kiwi

"Italian Analog polysynth based on DCO with resonant filters and patch memory. The Kiwi replaced previous simlar model Dk-600  and it seems it had a major distribution in Germany rather than in Italy " 

 Main Data 

Siel kiwi germany

Company: Siel
Model: kiwi
Class: synthesizer
Keyboard: 61 keys with velocity
Dates: 1983
Country: italy
Weight: 15 Kg
Dimensions: 90 mm x 39 mm x 18 cm
Price: 400€

Display: none
Technology: analog
Polyphony: 6 voices
Multitimbric: 1 part
Oscillator: 2 DCO saw + pulse
Filter: 1 VCF LP 24dB/oct
Envelope: 1 EGS ADSR type
Effect: none
MODULATION: 3 LFOs
Memory: 95 slots
Midi: in  / out  
PSU: internal
IC: 6X SSM2024 VCA (Quad Current Controlled Amplifier)
     6X SSM2056 EG (Voltage Controlled Transient Generator)
     6X SSM 2044 VCF   (4-Pole Voltage Controlled Filter)
     2X SSM2031 (High Frequency Oscillator) + TMS3631AN
         

61 keys keyboard with 2 wheels:
- pitch (to DCO1 and or DCO2)
- modulation  (depth to LFO1 and or LFO2/3)

Rear panel connectors:
-Midi IN / OUT / THRU
- mono output
- I/O for tape (with switch tab mode)
- 5 din connector for VCA CV control
 -5 din connector for VCF CV control




none yet

- No official VST plugin


- No user manual yet

- No service manual yet

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 Kiwi In details 

internal CPU

VOICE  main system CPU is based around  Texas Instruments TMS7000. Custom IC TMS3631AN generates 6 voices polyphony with 2 detunable oscillators DCO1 / DCO2 with 3 footages at 4' 8' 16'. 
Each oscillator features 2 mixables (only 50% volume) shapes and a noise generator with no control (but volume) can be mixed to DCO.    

Oscillator

-2 oscillator per voice at 4' 8' 16' 
- sawtooth  / pulse shape
- DCO2 detune coarse+ fine

Polyphony

up to 6 voices, no split, no stack

Noise

Pink noise generator with volume control

Dynamic response

4 different keyboard curves sensivity: high/medium1/medium2/low 

Siel kiwi computer

LFO / EG / FILTER

Filter

FILTER 

 the  VCF is a low pass type  24dB/oct resonant 
- keytracking mode 

LFo

LFO

- 2 separate modulators for DCO pitch
- extra dedicated LFO for pulse width and filter cutoff

Envelope

Envelope

 -1 EG generator assignable to:
VCA / VCF
The dynamics destination (velocity) can be assigned to either ADSR level or Attack time.

Siel kiwi

Siel Kiwi memory and editor

Editor

The Kiwi is sysex compatible, some old editors maybe for commodore64. No info about this for now.

Memory

The kiwi holds up to 95 patches. Memory system works with a battery with frequent leakage issues.

Our Verdict 

"Fun little polysynth with limited structure, still a good piece of hardware if in good shape. Not so common." 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- unreliable
- 1 EG
- very basic

PROS

-vintage
- lot of good IC
- sounds nice

Are you a KIWI user? do you like it? You do not agree with our review?  Let us know in the comment field just below 

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Audio demo and video 

SIEL KIWI SIEL KIWI
70 out of 100 based on 1 user ratings
300 to 500 from 1 sellers Sellers: