A bit of an update on progress with the Air project. This is 3d printed scale model of the design I am working on. The details are not final yet, such as driver position on the baffle etc, but we have used the model to discuss some of the finer detail with the various suppliers that will be working on different parts of the unit. It will have a composite structure carcass, an exterior trim layer that will form constraint layer structure made out of wood (bend MDF or maybe plywood) and the drivers will be mounted on an aluminum. The top models will be 3-way designs, one with a single bass driver and the other model with 2 bass drivers. Stand mounted versions will follow, one with a 18cm and one with a 20cm midbass driver. Tweeters will vary in the range depending on the design but will be from the Scanspeak and Morel range. I am now waiting for 1st prototype of the final structure so that I can start the final leg of the design process, but I have measured and developed crossovers based on 3d printed prototype baffles of the final design. The basic stats are roughly as follows for the 3 way systems:
- +/- 91/89 db's at a nominal impedance of 6 ohms, and minimums of 4 and 5.5 ohms respectively for the twin and single bass systems.
- mid 30hz bass extension and maybe just under 30hz in a room.
- Both 3 ways systems will be a gentle load for any amp and the single bass unit will be optimised for medium powered valve amps even though it will be less efficient.
There is lots of detail that we are working on, such as waveguides for the tweeters, port design and maybe, ways to tailor bass to own room. We have gone to great lengths with small details such as making sure that no nut or bolt will be visible, that internal cabling will go through conduits and the midrange unit back waves will be managed by a tapered and folded horn inside the cabinet.
If all goes well, I Hope to have at least the 1st production models by end of May.
and once happy with it, we will also finalise a design of a statement 2 way which we have already tested with international partners and although the verdict was that it will be a love or hate take on the design we were encouraged to push ahead with it. Someone said in a response to one of my postings that the project seems ambitious, and I would agree, although I am not sure if it was meant in a positive and encouraging way or as a sceptical comment. Finally, I can't promise a cheap product, but I am trying to do something worthwhile. If all the plans come together prices will start at around R30K and stretch to about R150K and for the local buyer, there will be solid discounts in line with those that the customers who have bought stuff from me over the years would have experienced.