I made a pair of Voigt pipes and

I was using them with a pair of Fostex Sigma 208s. The sound was fast, but a tad lean. I later found out that the Voigt cabinets themselves, because of their narrow fronts, tend to eliminate some lower frequency extension of any fullrange driver used. This was something I found out while writing back and forth with TWL, another member who has a Voigt pipe with Lowther EX-3 or 4 drivers. He found a way of remediating this.

Before you go to his thread, I think I understand why the speaker and its narrow front baffle eliminated some lower frequency. If you think of the fullrange driver as the beginning of a ripple, in order for it to expand exponentially, you will need a large area. Think the image of a pond. Nevertheless, because the Voigt pipes are narrow, as the sound waves propagate, their ripples tend to become cut off, expecially towards the sides of the cabinet, I think this is what causes the loss of lower frequencies.

Tom Lyons, AKA:TWL, came out with an ingenious solution. He added "wings" to the sides of his cabinets, if the front was 12", he added 12" wings to each side, that are hinged with some piano hinges. They can be in a plane with the front baffle or angled backwards, depending of the effect that was needed. For what it seems to be, his system must sound glorious.

I myself, cannibalized the Voigt pipes and have placed the Fostex in a folded horn cabinet, a Zhorn that Tom Zuworsky made for me...because I wanted some lows. On top of that, I added a powered subwoofer for even a more pronounced lower end.

I am happy with the sound I get now.

The Voigt pipes, with the winged mods should not be hard to make. It took me about a day to get the pieces cut. You need some room to manouver the sides and the front...if you have the space and one helper, I think you can make them for about $450, with ply and drivers included. They do sound dynamic, better than a 3.5 K commercial pair of speakers that I still have around.

PS: With the winged mods, I am sure that the Voigts will sound explosive by themselves.