I've had an interesting few days with the DIY cubes.

Whilst wanting to keep the mass as low as possible, I still had to address cabinet resonances. I ordered and received some perforated steel and some thin plywood to strengthen the bases, as these seemed to be the biggest source of resonance. I chose to strengthen these externally, as I had already put the speakers together.

The original bases really were flimsy. I Fitted the steel and capped it off with the plywood and filled the edges. Better, but still too much resonance from the cabinets and also a loss of bass. I hadn't expected that one.

I had to go further, so I cut some more of the perforated steel and fitted it to the cabinet side walls. I also damped the edges of the cabinets with some flexible adhesive strip.

In all applications of the steel, I used flexible polymer adhesive.. The polymer adhesive actually pushes through the perforations in the steel, hopefully acting as a damper. For neatness, I also glued some 1mm foam (akin to mouse mat but thinner) onto the steel plates.

Surely these steps would make things better? Actually no: Not to my ears anyway. The cabinet was now behaving itself, but the driver was now a bit fierce and still lacking in weight. Oval just not enjoyable. I really wanted to try undoped first and then proceed as minimally as I could. It just wasn't right undoped though and I'd expected that to be the case.

I started with a ring of Bison Kit around the dust cap. Definitely an immediate improvement. A 2nd and a third application have been added and the speakers are now miles better balanced. They als do far more convincing bass lines. Do I go further and add plastidip doping? I'm going to let them run in a bit and familiarise myself with them, but I reckon I will. I'm sure my ears will tell me when I'm there.

I'll post some pics below. I've got my Cubettes on as I'm relaxing and they are sounding mighty with some dance music.

This was never about the end results. It was all about the journey and the learning experience. I've had so much fun doing these, I've surprised myself
. If I end up with something decent musically, it's a bonus.

Sometimes eliminating resonances can end up with a result that sounds flat and less exciting. Do you think that's what happened, before you applied the doping?

Hello Andrew,

Rather than lead the other thread off topic I thought I would comment here if you don't mind 


Those wooden boxes really are lovely, just a pity there aren't any bigger ones. Did you change anything else after the last post on this thread ?


I have built a pair of rough prototypes with a large 90L bass cube for forward firing 12" doped Kevlar woofers These now run with another doped 12" behind the first in true isobaric fashion....wow. For the up firing mid and front firing tweeter I made a small cuboid as I wanted to compare front firing with upfiring mid and just blocked which ever cut out was not being used. I tried up firing (semi Omni) and loved it so much from the off that I never tried the mid front firing  . The small cuboid sits on top of the big bass cube with a blob of blue tack in each corner.


My drivers are all from RD, I did not do any doping on them but I have done some doping with another pair of doc mod speakers which have not been finished since I started playing with these big 3 ways. Bison kit really is the most headache inducing glue I have ever come across. 


Mine are still to finish as they sound amazing but look like crap. The concept is now proven but I need to make some proper cabs.

Did you ever get any further with the idea of triangular cabs with mid bass on the sloping sides ? An interesting concept.


Stu