The DD+ / DQ+ models are based on Class D output circuit controlled by KIND modulator. The great advantages of this technology are: low heat dissipation, compact size, and KIND sonic integrity. Reactive “back EMF” from the speaker is recycled to the power supply, and an efficiency higher than 85% keeps AC power needs to a minimum, while delivering more energy to the speaker. Thanks to the
high efficiency the DD+ / DQ+ series dramatically reduce power distribution demands compared to older high power amplifiers.