The Theta Digital Casablanca is considered one of the finest AV Theater Processors available with a Class A review rating. This version is the Casablanca IV and already has the best and Atmos-compatible DACs installed- (Upgradable to Casablanca IVa/V Atmos anytime from the factory with special Upgrade Pricing included as an option with this purchase) The Worlds most upgradable AV Processor with by far the most impressive track record in AV history -Read the story of Theta and the Casablanca below - You will then know why Theta Reigns all Mighty with the Casablanca and for almost 2 decades and more to come !! https://www.thetadigital.com/casablanca-v/https://www.thetadigital.com/reviews/ Here is your chance to own a Like New Casablanca IV with 2 amazing of the best 6 Channel Xtreme DAC 3s from Theta and 4K HDMI !! I am the original owner. This unit has 12 Channels of sound, DIRAC room correction software and is upgradable to 16 or 18 channels.This machine is a fantastic deal in this upgraded configuration - Casablanca IV Chassis as configured which has a MSRP of $25,000 + shipping from Colorado-Latest 2 Xtreme D3 Dac 6 Channel Balanced MSRP $5000 - 2 included for all channels-Latest 4K 4 Input Atmos-compatible HDMI video Card with 3D and 4K HDR support HDCP 2.2 MSRP $500 - included-12 Channels total Atmos-compatible setup currently for 7.1.4 sound Optional upgrades:Option 1 16 channels - Premium Dac 4 Channel Balanced MSRP $1875 - Special Price $450 for non-Atmos channels only e.g., SubwoofersOption 2 18 channels - Premium DAC 6 Channel Balanced MSRP $2995 - Special Price $2246 for either Atmos and non-Atmos channels Note that older D1, D2 Xtreme or P1, P2 Premium or Superior DACs are not Atmos-compatible. Atmos Upgrade from Casablanca IV to V MSRP $4995 - Special Price $3746 Keep in mind the DACs can be labelled and set to any channel on any card. Unlike any other processor you can have 7.1 or 5.3 or whatever you like, and you can change it yourself anytime. Includes Casablanca Processor, remote, manual, DIRAC license, calibrated microphone kit, and upgraded factory shipping box. Please contact with any questions.