Class XD™ Technology

At the core of the 840A’s strength is a patent pending, Class XD (crossover displacement) technology.

This unique design gives pure Class A operation at low levels, moving smoothly into an enhanced version of Class B at higher levels. This system should not be confused with Class AB, which inherently generates greater distortion at high levels than a pure Class B design.

XD technology feeds a controlled current into the output stage in a new way so that the usual Class B crossover point no longer occurs at zero volume - the worst possible position in terms of distortion – but at a significant output level.

The result is a smooth and linear transition between the two modes of operation, which differs significantly from the abrupt, distorted gain transition of a Class AB amplifier.

Choose another product: One integrated CD player & DAB/FM 2.1 receiver system, Azur 540D, Azur 540V, Azur 640C, Azur 640H hard disk music server, DAB300 tuner , DAB300 tuner , DAB500 tuner, DVD53, DVD55, DVD55RWi, DVD57, DVD57RWi DVD Recorder, DVD85, TT50 turntable, Azur 640C (version 2) , Azur 640T, DVD79, DVD89 HDMI DVD Player, Azur 540R, Azur 640R 7.1 HDMI AV Receiver, DVD77, DVD77, DVD86 HDMI DVD Player, M1+ Learning Remote, Azur 340T tuner, Azur 540C (Version 2) CD player, Azur 540D (Version 2) HDMI DVD player, Azur 540R (Version 3) 6.1 HDMI AV Receiver, D100, Azur 540C, Azur 540R (Version 2) 6.1 AV Receiver, Azur 640A, Azur 640A (Version 2) amplifier, Azur 340R 5.1 HDMI AV Receiver, Azur 540A (Version 2) amplifier, Azur 540A, A1 amplifier.