phase-it.com
References of the speaker polarity tester - Phase-it® - by Gato Audio
http://www.phase-it.com/ref.html
Here are a few organizations / persons who currently uses Phase-it. In their speaker production:. Milad Kahfizadeh, Tymphany corp. - www.tymphany.com. Ulrik Schmidt, Danesian. - www.danesian.dk. Duelund Coherent Audio - www.duelundaudio.com. Neeper Acoustics - www.neeper-acoustics.com. SUMOH - www.sumoh.com. Tistrup møbelsnedkeri - www.tm-tistrup.dk. Henrik Høegh - www.speakerbuilder.dk. Conpro ApS - www.conpro.dk. November 2010, Magazine audio. High quality audio equipment.