Denon AVR-S660H 5.2-Channel Network A/V Receiver - Manual (Page 192)

“Restorer” cannot be selected.
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Check that an analog signal or PCM signal (Sample Rate = 44.1/48 kHz) is input. For playback of multichannel signals such as Dolby Digital or DTS
surround, “Restorer” cannot be used. ( v p. 127)
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Switch to a sound mode other than “Direct”. ( v p. 99)
Sound mode settings are not available when using Bluetooth headphones. Audio menu settings are also not available.
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This unit cannot change sound mode or audio menu settings for audio output to Bluetooth headphones.
Contents Connections Playback Settings Tips Appendix
192
Front panel Display Rear panel Remote Index