Roland JX-305 GrooveSynth

Roland JX-305 Image

The JX-305 is an awesome synth for electronic & techno musicians! It's like an MC-505 groovebox in a keyboard. All of the MC-505's excellent dance-oriented sounds are included, as well as 4MB more! Combining keyboard style patch synthesis & performance with Groove Approved dance patterns, sequences and phrases the JX-305 is a real dance production studio with 768 dance patterns, 256 User, 640 patches and 28 drum kits.

Perfect for live use with its massive 64 voices of polyphony, you can jam along with it while it's instantly playing a great techno/dance groove! Then grab anyone of the 9 real-time control knobs to start tweaking the filter, envelope, tempo, arpeggiator or LFO. All real-time edits, pattern changes, tweaks and keyboard playing can be recorded into its 8-track sequencer - a robust sequencer with quantizing and edit capabilities! If your bag is dance, trance and rave then this Groovesynth may be all you need! It has been used by Astral.

Lookup Roland JX-305 GrooveSynth Prices

The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

Related forum topics


Are you looking to buy or sell a Roland JX-305 GrooveSynth? 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.

45 Visitor comments
August 6, 2010 @ 11:46 pm
I just got one of these. Best things ever, a bit hard to use, but is easy once you get used to it. Extremely versatile, with countless options and realtime controls for patches. The factory patches are crap, but when you learn how to make your own, you will get the bread and butter you need out of this synth. I personally love it, the Jupiter 6 and 8 waveforms sound pretty authentic. The sequencers and arps are awesome. The only things I wish this had were Juno 106, 60 and 6 waveforms. Still, overall a great, versatile synth.
R.W. Smith
August 1, 2010 @ 10:22 am
If you used an MC505 in the past, you know this machine. Haters who post have not tried to get into it. Why waste your breath on this little beast? They want ready presets. This machine has great possibility just look at youtube. The filters are great. I had the 505 first, but wanted a JX305 for the extra sounds and keyboard. Now I have an MC909 and the JX305. This is one of the most versatile machines Roland ever made. The sounds are classic and its great as a controller. If you can't make music on this, you are the problem not the machine.
July 14, 2010 @ 2:05 pm
ello Ash, still remember when you and si each got one of these, always thought the sounds weren't great to start with although some of the drums were alright - I had the MC-303 around the same time and always thought the JX sounded better even though the sounds on both machines were a bit weak. The fact that you've discovered it's a much better synth by actually getting inside it and using it's undeniable power to make pads and big sounds is a much better use for it - bet it sounds amazing once fully tweaked. Will have to have a go at this round Si's next time I'm over
April 23, 2010 @ 10:33 am
Wonderful machine! I use it mostly to build melodies and beats for trance and dance. As an all in one keyboard, synth, rythmn machine and sequencer I don't have to go much beyond it to get my ideas down. The presets [beep] s??? Well, a synthesizer is only as good as its programmer makes it. For the price, nothing in this world can beat it.
It has been used by Control Machete & Efecto Tralali
April 8, 2010 @ 10:34 pm
This was the first synth I ever bought (back in 1999) and i still use it in every track I make. That said it took me years of fiddling with it to discover its strengths. I initially bought it as a starting block as it had an onboard sequencer and was 8 part multitimbral so I could make beats right off the bat. However, I was underwhelmed with the sound as its very weak; I was really into acid and techno but the jx just cant recreate those sounds. That said, I have now discovered that 64 voices, 4 tone generators and independent LFOs and Envelopes for each tone equals the most complex, evolving pads and atmospheres a synth can make with 1 part! Not even my access virus can keep up making the JX my go to synth for big pads and swells
VSE Rating


User Rating

Rated 4.6 (1126 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 - 64 Voices
  • Effects - 24 effects including reverb, delay, chorus, etc...
  • Memory - 640 patches, 28 rhythm kits
  • Patterns - 768 Dance patterns, 256 User
  • Filter - Digital real-time & midi controllable resonant low/band pass filter
  • Arpeg/Seq - 8-Track sequencer, Arpeggiator and real-time Phrase Sequencer
  • Keyboard - 61 notes (w/ velocity)
  • Control - MIDI
  • Date Produced - 1998
  • Resources & Credits
  • Images from Synthesizer Picture Gallery (site gone).

Errors or Corrections? Send them here.