Planar Ribbon Loudspeakers

LaFolia Loudspeaker Project

Planar Foil Loudspeakers. Last changes Nov. 8, 2013 - © 1996-2013. All rights reserved on text, photos, diagrammes, etc, unless otherwise stated.

Index | Adhesive glue | Aluminium conductor foil | Aluminium L-profiles | Construction materials | Crossover | Magnets | MDF Plate or the Frame | Ribbon (Foil) Membrane | Membrane design | Foil Membrane tips | Membrane material | My experience | My building recipe | Original recipe | Perforated Iron plate | Practical Audio tips | Planar Ribbon Tweeters | FAQ's | Useful sites

Welcome to my LaFolia Magnetostatic Planar Loudspeakers site, I include material on how to build a pair of loudspeakers developed in Denmark by Ole Thofte (he has written a few mails to me in the past, all positive, luckily). It truly is a great project. But be warned you might just get the bug too and have at least 100 hours of your time sucked into developing your own planar ribbon loudspeaker model, if you do get the La Folia sickness, don't tell me I didn't warn you! :-)

What are these things?

Many will be asking, "What the hell are Magnetostatic Planar Loudspeakers?" Take a look at the photo and you'll get a minimal idea of what I am talking about, check out the rest of the site and you'll know what I am talking about.

I can, first of all, immediately tell you that it's the real down to earth short cut to Hi-Fi Heaven. What makes this project so attractive is it's low cost, extremely high end quality sound, a quality of sound that would normally require at least 10 times more investment, plus with the warm feeling that home-made dream speakers bring to your ears, though as with all things in life you'll have to live with the loudspeaker's low sensitivity and high power requirements.

Secondly, on a more earthly level, I can tell you it involves the same principles of normal run-of-the-mill loudspeakers, only that instead of using a cone shaped diaphragm, you use a flat stretched out membrane on a MDF fibreboard frame; instead of having a copper coil it uses a long flat thin aluminium foil cut out in a specific design, all within a homogenous magnetic field generated by normal flat magnets, these magnets are upon a perforated iron plate.

Thirdly, anybody can build these planar loudspeakers, with no special skills other than patience, a few tools and aprox. 500 US$, hard work and some common sense.

Fourthly, it's a proved principle, used by many different High End Loudspeakers, including the famous brands like Apogee, Magnepan, DALI, Carver, among others.

Can I build Magnetostatic Loudspeakers?

This is more than a mere experiment, it's a proven DIY project with a great amount of knowledge behind it, I personally learnt about this loudspeaker project in Denmark, where this originated. I will quote many articles from Danish magazines, where the planar loudspeakers were dubbed "La Folia". I can in no way claim authorship of this project, I was just the first person to put this online, it will hopefully help propagate this community project around the world, and give us a bigger wealth of experience to build upon.

I include detailed information on the building of my own La Folia Planar Loudspeaker model, which I enjoyed everyday when I lived in Chile. I added quite a innovations, which I feel are to a certain extent original and different to the Danish projects that I include. I have been out of Denmark since 1990, so I have not had access to Danish innovations, I expect some danes will contact me with more info.

One model of Planar Magnetostatic Loudspeakers
My ribbon speakers
 

Contact: Magnetostatic Loudspeakers