I know the Opera 6 just from the samples i've found on the web. I've bought an Opera 6 with serious battery leaking damage.

It seems one of the best products from S.I.EL. in terms of "warm sound" - considering the S.I.EL. warm standards of course ;) - anyway it's better than other model i have , DK 80 (very thin), Cruise (polyphonic parts) or Keytek Cts 2000 this last one is a wavetable synth , but despite this, it sounds "thin".

The internal architecture shows the standard S.I.EL. "low-end" concept.

Inside it, there's a large 6 voices board with 6 control leds, it wears 6 SSM 2044 filter chips, 6 SSM 2056 chips and 6 SSM 2024.

The boards are joined toghether with flat cables that ends on "BURNDI" plastic connectors and normal flat junctions, normal, but very poor quality.

The system board is placed under the keybed It wears 2 SSM 2031 on the upper right corner. Here we can find also the Main CPU and patch assignement control chips. Here is also located the infamous Backup Battery, Three batteries wrapped toghether in a kind of blue-green plastic film. The "-" pole is from where the corrosive acid leaks. Unfortunately there are several chips near it, one group of resistors, two transistors that will be involved for sure in case of leaking. They're too close, so, no way out.

I'm just spending time on this damaged synth to make skill with PCB handling, restoring traces and components substitutions, and, why not, for parts. Anyway, if someone have an Opera 6 without Battery leakage but Blown anyway for other reasons, please contact me, i'm interested to buy it.

Cheers, Sandro.

Main Specs: 6 voice 12 oscilattors 61-note (C-C) 95 programs MIDI velocity-sensitive synth.

some of the sounds of this synth are unique unlike the tired Roland sounds who are basically all the same...if you are interested this synth is becoming pretty rare now as the SIEL as been bought from a company who sold everything and then dismantled it. Sequencial circuit inc made a model of the Opera 6 with a different name (Velocity 6) and a different case it's a Opera 6 with a different name home.worldonline.nl/~smeyer/siel/velocity6.htm

Mine is unfortunatly broken because and it's my fault short circuited it and i broke the main voice board but I will try to make it repaired by a good tech who can actually use a solder and rapiar stuff without changing the whole board which is by now impossibe to find unless you find another one that has this part working and replace it.

All in all i give it 5/5 I realy miss his sounds and that's not someting i can say from a roland or another commercial product-