Still wrapping my head around this awesome piece of gear! True, other synths offer more, but I find that having some limitations breeds creativity. And the B-1 does way more than it should for the price! Great purchase!

When I first saw this on YouTube, it was being billed as a "TB-303 clone" of sorts. But the truth is, this goes further than Roland's little silver box (or their three or four "we're not going to reissue it" versions). For one thing, this has something that makes sense as a user interface. The keyboard pads actually do double-duty by being visual feedback for various types of poking around with sequencing, the knob layout is very clean and direct, and the overall design is just a lot more user-friendly than the OG. For instance, you have a number of easily-accessible buttons that replace the unintuitive 303's function buttons...and the B1 actually adds a few tricks to the 303 sound. Ratcheting? Yes, please! But the SOUND...is it what we all expect? Well, yes...in more ways than one. For example, the original 303 didn't have the most linear "glide" behavior...and amazingly, Donner's replicated even that and some other Roland "mistakes" that actually play a part in the classic acid sound. Now THAT is detail...and it's a detail that a lot of the 303 clone companies miss to varying extents. The fact is that if you want that sound, you also want Roland's "mistakes" which help that sound...and it's all here. But when you kick this thing on and put it through its paces...oh, myyyyy...it's 1987 and time for "Washing Machine" all over again! Oh, yeah...MIDI...I almost forgot that since I'm not used to thinking about MIDI when it comes to the TB-303. But the B1 goes WAY past the original by having MIDI out AND in. You could clock the B1 with your DAW (it likes a number of different sync signals) and then have the B1's sequencer feed a VSTi in the DAW. But why would you do that? If this were Yet Another 303 Knockoff, I'd say, sure...sequencer's right, sound's wrong, or vice-versa. But the B1 has THE SOUND...all of the nasty growl (especially when you jack up the distortion!), squeal and howl, and so forth, just as you'd expect. That distortion circuit was, I think, a good choice...it meshes with that near-industrial acid sound and pushes it one step further into the acid lead that you'd expect...only you DON'T have to pay $3,000+ to get it now! Oh, and it's got a delay. Acid lines sound great with that effect, and Donner seems to have thought ahead there. Sound-wise, the delay isn't as aggressive as you might think, but if you're out doing a DAWless gig, it's excellent to have that right there and ready to go. Again, Donner seems to have done their homework on what the TB-303 needed to have. But the B1's not quite perfect. There's two things I'd like to see in a firmware revision, one of which a Donner rep said on (I think?) Gearspace will probably be in the next update: randomization. This is actually far more important with a TB-303 clone than one might think. Some of the most amazing tracks from the heyday of the acid house scene were written by taking the 303's batteries out, then putting them back in. This would scramble the sequencer...but in ways that could be prodded into more solid lines, or in a few cases, nothing further was needed. So being able to "take the batteries out" on the B1 is, I think, a must for any proper TB-303 redux. The other thing I'd love to see, which wasn't an acid thing but which loads of other synthesists would go bonkers over, would be a way to kill the VCO's output. Since the B1 has an "audio in", switching the VCO off would let you use the instrument as a sequenced filter. Like I note, this wasn't exactly part of the original Roland 303, but it was a mod that some users could do, along with some other trickery with the "voice" such as FM, VCO doubling, and the like (think "Devilfish mod" here). Although, given the sound that you get from the B1, I think it shows its heritage just fine without extensive mods to the audio path beyond that one "VCO off" trick. So it holds up against its progeny just fine...but against the other 303 clones? Well, as I mentioned, pretty much all of the clones miss a detail or two that winds up altering the sound. And some of that, I'm sure, is due to companies copying the circuitry itself and then calibrating things to sound "good". But the TB-303 DOESN'T "sound good" when up against a "real synth"...and Donner nailed that nasty, skittery, squealy, snarly distorted sound...which is a really big feat, in my opinion. Add to that the ease of programming the sequencer, and you're in a little better territory than the other clones that tried and didn't quite hit that early 1980s mark. Oh, yeah...one other point: the software. Software? For a 303? Yep, software...and it fixes the worst part of the original: dealing with that damnable, obtuse TB-303 sequencer to write and play patterns. With the B1's simple software, you can write sequences, transfer them via USB (yeah, it's got USB!) to the box, and there you are! Didn't like the ninth note in that line? OK, just go back and move it via MIDI...no gnashing of teeth due to having to re-enter things again. And that's another point about the sequencer here...if you ARE forced by circumstances to alter specific notes in some way, it's NOT a total gig-killing disaster. Need glide on the fourth note? Well...just add it right then and there. Put in a new sequence? Yeah...it'll take a few minutes of button-poking, but you're never in a situation where you're utterly, totally stuck. So...for those who want a TL;DR on this, I've got to say that the B1 is the thing you or I or ANYONE who wants to get that awesome acid sound have been waiting for. Took 40 years...but the Acid Box is back! And, to be honest, it's BETTER! No need to scrape up...hmmm, lemme look at Reverb...ok, about $4,000 for the little plastic original. Just hand Donner what's in your change jar and wait for delivery. And THAT is the best part of all!

Amazing!

BASS! Great sound and the distortion and delay take it over the top. Sync in? Yeah. Full MIDI specs, yep! I’m betting an analogue drum machine is next. Take my money, Donner!

This is a fun little synth. It doesn’t try to be a direct TB-303 clone, but it’s sonically much closer to a TB-303 than some of the more expensive clones. The Arp and Ratchet functions are handy and the delay and overdrive are usable.

It is easier to figure out than some other 303 clones (not that any of them are very challenging). It has some features that are unique so it's worth getting one even if you have other brands.

This is quite a handy piece of equipment for not a lot of money - build quality and sound quality is very good - nothing in the price range is better and that includes the Behringer equivalent.

Great first crack at a synth, I hope they stay at it. I'd love to see support for modding for USB power!

A very good product. Fast delivery, well packaged！

Deserve a try.

best analogsynth in it's price range