Devialet Expert 440 Pro Dual Integrated Digital Amplifier Review

May 6, 2020 § Leave a comment

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“The beating heart of any integrated is its amplification and the Expert Pro is no different. Devialet has been using a steadily software-refined form of what it calls ‘ADH’ amplification, or Analog Digital Hybrid, since the first D-Premier. The principle of ADH is a simple*, yet highly-effective one and offers a unique solution to heat generation and sound quality: an analog (Class-A) amp determines the load’s output voltage while passing off the associated current generation function to a Class-D (digital) switch amp. Having the Class-A ‘master amp’ entrusted with voltage/audio performance and the Class-D ‘slave’ amp with current/power requirements very nicely allows for the superior sonics of Class-A without the extreme heat generation associated with that type of amplification. Class-D runs cool in comparison and is how Devialet can stuff 220 watts into such a small enclosure and still have exquisite sound without burning your fingers off were you to touch the chassis”

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