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Siel DK-600

Analog polysynth (1983)

Siel DK600

"Vintage analog polyphonic synthesizer from Italy with 2 DCO programmable oscillators and a low pass filter structure. Also rebadged and Siel Opera 6 and with an hardware upgrade in version Siel Kiwi." 

 Main Data 

Siel Dk600 music

Company: Siel
Model: Dk600
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

- Dk600 service manual schematics

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 Dk-600 In details 

internal CPU

VOICE  main system CPU is based a controller from  Texas Instruments TMS7000. The Siel voice generator is a TMS3631AN with 6 voices polyphony each with 2 detunable oscillators DCO1 +  DCO2
The DCOs can be  mixed only at 50% volume (no sync option).
Also a  pink noise generator with no control but indipendent volume.

Oscillator

-2 oscillator digitally controlled per voice at 4' 8' 16' octaves
- sawtooth  / pulse shape (adjustable width)
- DCO2 has a detune option with coarse and fine

Polyphony

up to 6 voices at the same time, no split, no stack, no unison.
The dedicated module Siel EX-600 doubles the polyphony, it has no control but it can be programmed from Dk600 

Noise

A internal Pink noise generator with volume control

Siel Dk600 EX600

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 DK600 memory and editor

Editor

The Dk600 is sysex compatible, some old editors maybe for Commodore64. 

Memory

95 patches storage.  A lot of issues with leaking NiCad memory battery

Our Verdict 

"A lot of damaged Dk600 for battery leakage! these are getting hard to find! a bit limited structure but warm sound." 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- battery
- 1 nvelope
- basic structure

PROS

-italian vintage
- lot of good IC
- sounds warm

Are you a DK-600 user? do you like it? You do not agree with our review?  Let us know in the comment field just below 

DISQUS COMMENTS WILL BE SHOWN ONLY WHEN YOUR SITE IS ONLINE

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Audio demo and video 

SIEL DK600 SIEL DK600
70 out of 100 based on 1 user ratings
300 to 500 from 1 sellers Sellers: