Sequential Pro 3

Very big problems with the actual OS, crackles, pops and clicks from the effects section, no midi transport with Local Control OFF in Ableton, sequencer. Completely unusable in Ableton Live 10. When I switch a preset with a Program Change command from a DAW the Pro 3 goes nuts. The sequencer in Pro 3 starts blinking like a christmas tree on crack and some crazy noises comes from the instrument. Sometimes it just freezes up completely. This happens every time when a preset have the Pro 3 sequencer running notes or automation automatically. A lot of firmware issues also some people experienced hardware issues with the cutoff knob and pitch wheel, check the forum.sequential.com if you want more info.
Sorry but I don't recommend it, I'm returning mine this is my first and last Sequential.
Bad experience!

I was torn between either getting a Moog Sub37 or PRO3, but at the end of the day PRO3 now sits in the studio as one of the main synths.

The main thing i love about PRO3 is the tuned feedback module! Absolutely stunning and gnarly. And you can route external audio to it as well. So for weird and heavy bass sounds or even leads, it's perfect!
And for warm analog sounding stuff it pulls it off extremely well, for simple warm synth bass you can just have 1 saw osc , record some audio in the project while jamming with the filter cutoff (amazing filters btw) and then i use Fairfield Circuitry's Shallow water on top of it. You instantly get something warm and soulful.

Easy to use, not too much menu diving needed, can do simple stuff really well and you can go pretty crazy with the sound design stuff as well.

My only 2 cons are

1) I don't really find myself using the sequencer a lot (compared to Arturia minifreak's sequencer, which is hella fun)
2) The built in effects(reverb, delay etc) don't really impress me much. Compared to Novation Summit or even the Arturia Minifreak, which have amazing sounding fx, the PRO3 usually gets sampled to audio in dry, and the fx come from either DAW or pedal's afterwards.

But all in all, an amazing piece of gear to have in your everyday arsenal.

I rarely leave negative reviews, but my experience with this unit has been very disappointing so far.

I purchased a brand-new Sequential Pro 3. Within a short time, the device began producing very loud white noise (30db) whenever it was powered via the supplied power brick. The noise goes directly into my audio interface and makes the synthesizer unusable in a studio environment.

I returned the unit for repair through Thomann. The repair report stated:
“Temporary short circuit on motherboard fixed, test run passed.”

However, approximately one week after receiving the instrument back, the exact same issue returned. I am now sending the unit in for repair for the second time.

To rule out external causes, I tested:

- multiple cables,
- an isolated power source,
- and different audio inputs.

None of my other synthesizers (around ten units in the same studio setup) show any grounding or noise issues, which strongly suggests the problem is internal to this specific device.

At this price point (around €2,000), I expected long-term reliability. Instead, I have spent more time arranging repairs than actually using the instrument. I hope this second repair resolves the issue permanently, but the recurrence after the first repair is concerning.

My intention with this review is not primarily to criticize Thomann’s support - the staff have generally been helpful. However, the process has been slow, and communication has been difficult, as I often had to restart my explanation with different representatives and without a clear case history. My goal is simply to highlight a serious reliability issue with this particular unit so that a durable solution can hopefully be reached.

At this stage, Thomann has declined to exchange the unit, which would have provided significant reassurance. As a result, I am left with uncertainty, and the repair process will likely take another month to six weeks. This effectively means being unable to use the product for nearly six months since purchase, which is critical for me.

I will of course update or revise this review if a permanent and satisfactory solution is reached.

I spent the first hour just dialing through presets and found so much variety, far more than I had initially expected.

When I came to create my first patch I had something exciting and inspiring within minutes and then lost another hour to playing and tweaking.

Having watched reviews and tutorials, I had a fair idea what to expect but honestly, this thing is so much better than that. If you get a chance to try it, do so but beware, your wallet might end up somewhat lighter!

Awesome job by the team at Sequential, I'm pretty sure this is set to become a modern classic.