Quasimidi Sirius

Quasimidi Sirius Image

The Sirius is Quasimidi's souped-up keyboard similar to the RaveOLution 309 and aimed directly at the dance market. It's filled with knobs, buttons and cool colors. Designed for total control for live performance or studio work!

Actually most knobs are dedicated to patch editing. It has a welcome new feature, a modern vocoder! There are also 8 control knobs for setting various mixer-type settings (level, pan, fx send). That's right, it has effects on board! It's got a great sound too! Choose from basic categories like 'bass sounds', 'dirty bass', 'pad sounds', 808 & 909 kits and much more! There's plenty of memory (96 user patches) to store your own creations. The filter and envelopes are flexible and sound very good.

Quasimidi Sirius Image

Also taken from the Rave-O-Lution is the incredible pattern-based seven track sequencer with part mutes and tap-tempo! A truly useful dance music production synth capable for demanding studio use and creative live performance control with excellent sounds and a funky new vocoder! An ideal all in-one-synth for any DJ or dance musician! It has been used by KMFDM/MDFMK founder Sascha Konietzko.

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Are you looking to buy or sell a Quasimidi Sirius? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

34 Visitor comments
David J
January 14, 2014 @ 12:38 pm
Regarding power supplies, I bought a Sirius without a PSU in the UK, and I bought a laptop PC power supply which was 10.5volt, 1.5amp for a Compaq laptop. Soldered on the correct DC plug and bingo, a regulated switchmode psu that worked perfectly. I sold it eventually as the touch sensitivity of the Sirius is awful..!
October 22, 2013 @ 4:54 pm
You can use the 10,5V Sirius with a 12 V adapter as well. I own a European one and used 3rd party adapters, too.

I use the Sirius for my trance productions until today and also offer a sound bank for it (google for JayB) - my name was mentioned in one of the comments. I use it mainly for drums, especially hihats, cymbals and percussion. And the Sirius is really great for that. Same for pad sounds and layers for lead synths. However, the filter is a big weakness since the cutoff frequency has an exponential scale what makes plucks sound terrible. Not to mention the ADSR curve itself...
June 17, 2013 @ 10:39 pm
No wonder Quasi went out of business! A European Sirius DOES ask for +10.5VDC input @ 1.5Amps. And yet, the North American Sirius units want to see +12VDC @ 1.8Amps (as does mine). I could find zero sources for 120VAC to +10.5VDC at 1.5Amps adapters.

Have your local tech take a look inside your Sirius. They should be able to figure out if the regulators on the Sirius power supply PCB can handle a +12VDC input (very popular).

Best of luck, and sorry for the confusion.
June 16, 2013 @ 11:45 am
And just a note... that 230v50hz / 10.5v 1.5A adapter looks to be from a European Quasimidi Polymorph. To power a Polymorph in the USA, you'd need an adapter with 120VAC input and 10.5VDC at 1.5amp (1500ma) output. That one might be harder to source because 10.5VDC adapters are nowhere near as common as 12VDC.

Best of luck.
June 15, 2013 @ 9:34 pm
Any 120VAC adapter that outputs 12VDC at 2amps should do the job in the USA. My Sirius requires 12VDC at 1.8 amps (1800ma), with positive on the inside of the barrel, negative on the outside of the barrel plug. Almost all adapters have positive on the inside of the barrel (they will clearly let you know). Your local Value Village will have a good selection of used AC adapters (all for $1.99), keep an eye open for one that outputs 12VDC at 1.8 or 2.0amps. If you need a plug/barrel adapter, they can be had on ebay for about $3.99.

Good luck!!
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Rated 4 (436 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - 28 voices
  • Oscillators - 2 osc: 128 synth waves, 365 drum and percussion samples
  • Filter - 24dB and 12dB slopes, Hi and Low pass filters with resonance and overdrive
  • Effects - FX1: reverbs, stereo delays. FX2: chorus, flanger, delays; vocoder
  • Arpeg/Seq - 16 pattern arpeggiator / 7 track sequencer with tap tempo
  • Keyboard - 49 velocity sensitive keys
  • Memory - 384 patches (288 preset, 96 user), 16 vocoder patches, 20 percussion kits
  • Control - MIDI (7 parts, 3 synth and 4 drums)
  • Date Produced - 1998
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