Eminent Technology
Exotic-looking planar speakers, analog gear, accessories. Useful test tones on the web site.
http://www.eminent-tech.com/

Guru AV Design
Manufactures the compression and planar drivers.
http://www.guruavdesign.com/

Analysis Audio
Manufacturer of planar and ribbon pannels. USA.
http://www.analysisaudiousa.com/

Poly-Planar
Poly-Planar - Waterproof Marine Audio Systems
http://polyplanar.nl

Infraplanar
Makes large planar bass isodynamic loudspeaker. France.
http://infraplanar.free.fr

Poly-planar
Makes and design waterproof marine audio systems. USA.
http://www.polyplanar.com/

Tri-Planar
Manufacturer of tonearms and accessories such as counterweights and extra base for height adjustment. USA.
http://www.triplanar.com/

Magnepan
Manufacturer of stereo and home theater ribbon and planar-magnetic loudspeakers.
http://www.magnepan.com

Audio X Stream
Manufacturer of planar magnetic driver and ribbon loudspeaker. Provides FAQ and information.
http://www.audioxstream.com/

Ceratec
Ceratec setzt auf hochwertige Materialien. Echtes Aluminium, echten Chrom und echtes Mineralglas. Damit erreichen wir eine Qualitätsanmutung, die sich an den edelsten Industrieprodukten orientiert.
http://www.ceratechifi.com/