I have reduced the number of the designs on this page to one. The reason is, the Double Horn Design is now a confirmed enclosure. 

Construction; the only problem with the horn design is the WAF. I can never understand this and I think I will not spend a second trying to understand why women are putting the design of their living room in front of music appreciation. With a height of 175 cm the Horn design is keeping all the good elements of enclosure building. The depth is around 55 cm and the width is 25 cm, making it a slim and good looking horn. 

As you can also imagine, the horn design can have a better imaging. The speaker unit is at 85 cm high from floor level making it very suitable for listening position. Also the horn mouths give a D’Apoolito character to the design. This one is also immune to the placement errors. Yet another thing about this enclosure is, the time delay, given by the placement of the speaker unit, enables the sound energy distributed evenly in the listening room.

And here are the drawigns. The ziped file contains two files, one of them is a DWG (2004) format and the other one is DXF (2000/LT) format. There are many free viewvers for these files. For those who do not have access to those software here is the pdf format of the drawings. Many thanks to Marco Bianchi for his kind effort for the excellent pdf convertion.

Courtesy of Tim Bland

Comments from Marco Bianchi

"We have today listened to your speakers, the sound is fantastic. It is surprising how low these horns go down in bass, given their relatively small size. We did not have technical instruments to measure, but we are pretty convinced that the speakers go down to 40hz linear. This is the best horn loudspeaker we have heard so far, without doubt. Once again, we found the bass very clean. I can honestly say that, at least in the room we listened, nobody would opt for adding a subwoofer to these horns. 

We liked the Fostex 207E much more than the 206E in these horns. The 207E have the same beatiful midrange of the 206E, but they do not screem in the highs. This is an excellent result. Also, it seems to us they produce more bass in your cabinets than the 206E? I wonder if the fact that they only go  up to 14kHz makes it so they can focus on the rest of the frequency range better than the 206E do. No doubt, some people will want to add a tweeter to the design, other not, depending on taste, room, etc. The design has a tweeter hole in the cabinet, so no problem adjusting for that. Today, we only heard the speakers with no tweeter connected.

Another driver which sounded very good in your horn was the AER MK-1 (the one I bought in Germany). I think the German company slightly modified the driver to give more bass and is not doubt this configuration has more bass than Fostex 207E. Sometimes, one may feel even too much bass with AER! AER is also more detailed that 207E but we think this driver is better matched with a valve CD player like Docet-Lector 0.5 to add some warmth to the sound (the 207E is already warm enough, also because less detailed)."

And here are the simulation results.