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Analog Synthesis has made a massive come back, as I am sure you have noticed.The market is awash with really great models being made by hundreds of manufacturers ranging from old industry giants to Mad-Scientist types peddling both classic and envelope-pushing new ideas in modular form. But, nearly everything is monophonic and after a while, I was just obsessed with the idea of playing big lush chords without sampling a mono patch and making a fake polysynth with a sampler. Vintage polyphonic synths are too expensive and need constant attention to be useful. This Mopho X4 gave me the power to have genuine polyphony and the rich authenticity of each not triggering its own envelopes rather than pitching the envelope's reaction like a sampled sound will do.Dave Smith has been at it for a long time. He knows how to put together a powerful machine. I had the yellow Mopho desktop module for a while but since I already have a couple mono-synths, I just wanted more out of it.This Keyboard has really easy control (not quite knob per function, but knob-per-most-functions, and very little annoying menu-navigation) of all parameters, Stereo outs (with control over stereo field via LFO, Envelope, or other Mod source), as well as just sounding great. The Mopho X4 is about the most value for an analog polysynth as far as I can tell.If you are looking for polyphonic powerful subtractive synthesis, this unit deserves a serious consideration. The filter is nice, although it's only a Low-pass (Sorry. No multi-Mode), although it does allow you to switch between mega resonant 4-pole, and capable thin-resonant 2-pole..It would have been nice to have more modes...If you work the filter though, you can get it to do tricks you typically wouldn't expect from a lone Low-pass filter.Modulation options are fairly diverse, fun, and easy to route. All in all, this thing is a beast. Four note polyphony, TWO rather big sounding sub oscillators, and stacked unison detune mono trigger mode for bass patches that undulate and make your head swim.The sequencer is great too.You can't lose.You should probably buy one.

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The Mopho x4 is an excellent four-voice DCO synth. The architecture is versatile with lots of modulation options. You can make any sound you want on it. The interface does take a bit of getting used to as many functions are one layer deep.The sound has a bit of an edge that I find satisfying. Even on smooth pads it still has a slightly gritty texture (not silky smooth like a Roland). The oscillators are thick and the sub oscillators provide all the heft you could want.The build quality is excellent. It has one of the best synth action key beds I've used (the main reason I got it actually). It has a small foot print for a 44 key synth. It works perfectly as a MIDI controller as well.I can easily recommend this synth to anyone looking for a unique analog polyphonic at a reasonable price.

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I've owned the Mopho desktop synth the little yellow one but sold it I've should of kept it.But i was wanting a good sounding synth with some crazy sounds in it i thought about the DS mohpo even i knew the desktop was no longer being sold i saw the mohpo x4 was with keys and saw with a bigger price tag but because i like DS synths i jumped on it i know it's been out for awhile so i said i better get it before they quit selling it so i did I've been using it in just about everything i do even some nice synthwave bass sounds and crazy analog sounds good job DS this probably be my last one

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The sound is great. I have a MoPho, so four voices is awesome. But, the OS will not update. It only updates via MIDI, or USB>MIDI (not straight USB). And, OS updates keep yielding "Sysex Errors." I work in I.T., so I know the routine—I tried a different computer, drivers, ports—even running with a MIDI thru intermediate device. After much correspondence, the only solution DSI provided was, "Buy another USB>MIDI interface." Frankly, I don't think that's very good customer service—especially after purchasing a $999 synth.

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This is a great synth analog sounds are good takes me back to the 80's lol retro sounds awesome I will be using this board for a very long time cool sci-fi sounds to

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