Amazon.com: Official Audyssey Replacement Microphone for calibrating Denon, Marantz, Onkyo, Integra, Teac, Tascam AVRs : Musical Instruments
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Customer Reviews: Denon AVR-X4700H 9.2-channel home theater receiver with Wi-Fi®, Bluetooth®, Apple AirPlay® 2, and Amazon Alexa compatibility at Crutchfield