Marantz AV 20 Home Theater Preamp/processor with 13.4-Channel Processing, Dolby Atmos, Apple AirPlay 2, Bluetooth, and HEOS Built-in Kicker KB6 Indoor Outdoor Patio Speakers Bundle Black (4 Speaker Bundle) closed-back design has been tuned

closed-back design has been tuned to provide excellent passive isolation and elimination of unwanted resonant frequencies

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Marantz AV 20 Home Theater Preamp/processor with 13.4-Channel Processing, Dolby Atmos, Apple AirPlay 2, Bluetooth, and HEOS Built-in Kicker KB6 Indoor Outdoor Patio Speakers Bundle Black (4 Speaker Bundle) closed-back design has been tunedMarantz AV 20 Home Theater Preamp Processor with 13. 4 Channel Processing, Dolby Atmos, Apple AirPlay 2, Bluetooth, and HEOS Built in AV 20 represents the highest measure of performance and capability for reference level home theater systems. This reference 13. 4 Channel Balanced AV Preamplifier features Marantz HDAM discrete circuitry, and boasts seven HDMI inputs, each of which is 8K UHD compatible. Product Highlights: Home theater preamp processor