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I am looking for the A upgrade for my Denon AVR-3808, AVR-4308, AVP-A1HD or AVC-A1HD. Where can I find it?

Please note that we discontinued the A upgrade service for the following Denon products in December 2015 after 7 years.

AVR-3808       Upgrade to add Audyssey Dynamic EQ, Dynamic Volume and CEC
AVR-4308       Upgrade to add Audyssey Dynamic EQ, Dynamic Volume and CEC
AVC-A1HD    Upgrade to add Dynamic Volume and Denon Link 4th
AVP-A1HD     Upgrade to add Dynamic Volume and Denon Link 4th

Therefore, these units cannot be upgraded any longer to the respective A versions.