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PhaseTech® products come with a limited ten (10) year warranty on all speakers and a limited three (3) year warranty on all electronics. Should your Phase Technology product require service, please call the MSE Audio customer service department for a return authorization. All merchandise returned to PhaseTech without prior authorization will be refused. For your return authorization number, please call 855.663.5600 or email returns@mseaudio.com. Purchase orders may be sent to sales@mseaudio.com. Please remember to specify color. Remittance: 13720 W 109th St, Lenexa, KS 66215, USA.