Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

I do like some open baffle speakers, but, I would think that if it were so easy to make a "much better version of the Cube speaker" by making a very easy to build and cheap open baffle version, Cube or someone else would have done so already.  There are probably good reasons why went with what appears to be a version of the Voigt pipe form of loading.  

Still, it would be great to have a thread with DIYers showing off their designs.  I've heard some really interesting OB speakers, including some monster, cost is no object designs using twin 18" fieldcoil woofers in a baffle more than 4.5 feet wide.  

Nelson uses Cube f8 in OB

https://www.stereophile.com/content/gramophone-dreams-26-nelson-pass-harmonic-distortion-page-2

The reason Cube (and most companies) do not make open baffle speakers is that it is not an easy sell. The baffle needs to be large, you need space behind the speaker or you do what Nelson does and add woofer below. They are selling a look....a lifestyle......slickness....they are not selling super hot rods.

Look at the crappy wire and banana plug Nelson is using....he is not a tweak, for sure......no Ground Enhancer, No Bybee, no wiring directly to the voice coil wire.....and not good wire......probably has the same banana things on the amp end of the speaker wire.....you know...so he change change wires or amps real fast.....Hot rodding is so easy.....and takes so little time....and the sonic rewards are amazing..........but, he just has no interest in it. He even told me so.

It is not just the large front baffle and space requirement that works against OB, they do not go as deep bass-wise because of the lack of reinforcement and because of out of phase cancellation.  I personally don't give ultra deep bass a high priority, so OB speakers are attractive, but, the market seems to really put such a premium on ultra deep bass--hence the use of subwoofers, popularity of high wattage solid state amps that can deliver bass punch, etc.  

A lot of the modern speakers with their very narrow front profiles sound the way they look, to me--thin and lacking is weight.  I do wonder if not enough concern is given to baffle-step and diffraction issues with some of these thin baffle designs.

The Nenuphar might have slightly deeper bass than putting the driver on an open baffle. My friends 10 inch lii driver on the open baffle I described is flat in large livingroom to 40hz and 5 db down at 30. The Nenuphar cannot move that much air at lower frequencies and that is why there is the Basis.....the Basis adds low bass and punch and the smaller ported cabinet for the full range makes it roll off the lower bass on the full range driver.....so it will play louder without overload. You could do the same with an open baffle version of a Cube.....you add woofs underneath and you change the coupling cap in your tube amp or whatever that creates a 6db per octave rolloff on the main driver areound 60-100hz without adding any crossover parts. If you use a better quality cap in the amp....then you have another boost in sound. Lots of ways up the mountain. Creativity and an open mind are king.