Harman Kardon CITATION 21 Stereo Pre-Amp Controller Tested Working Preamplifier has been fully tested and is in working order. Distributes clean audio. lights and all buttons work. Only issue is when you press the phase correct button it makes a pop, just the half a second when you press the button in. Cosmetically in very good condition. Model#: Citation 21Serial#: S101-04711 ELECTRONICS DISCLAIMER: Due to the nature of electronics, Serial numbers have been photographed and recorded, and tamper proof labels are used to prevent tampering. We strive to take excellent pictures and describe items as thoroughly and accurately as possible, but please dont hesitate to ask any questions that you may have. Thanks for looking! EB-12703

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