I see CROWN amplifiers fairly in-expensive and the spec sheet does not look that bad. View attachment 29546 So, how do they compare? It doesn’t take a lot to hear the difference between class AB and class D (the two more common amplifier classes available - and the two in question). The AT500 series is 25% cheaper and up to 50% lighter than the AT4000’s. As i have read class D is more efficient so less heat and less bulky. Avoid class D Amplifiers for use with a customary speaker (other than a sub) for genuine melodic tuning in. As for the distortion they produce - it is not exactly clear to me as I have yet to find a single extensive test result of any of the class D amps on the market. Class D Amplifier: A Class D audio amplifier utilises switching technology within the amplifier. Let’s find out. Read: ATI Class AB vs Class D Amplifier Shootout It is more how the design is implemented than the class of Amplifier. Selbst bei einer Ausgangsleistung von mehr als 50 Watt kann man einen Class-D-Verstärker immer noch in Zigarettenschachtelgröße bauen.Das führt dazu, dass wir diese Verstärker heute vor allem in kleinen Geräten finden. Put a good class D and Class AB beside each other with a proper setup and you will not be able to tell the difference. Class-D amplifiers theoretically can reach 100% efficiency, as there is no period during a cycle were the voltage and current waveforms overlap as current is drawn only through the transistor that is on. Hi Guys, Is it true that audiophiles prefer class AB over class D amplifiers ? Class D – der Digitale. "Class D" wastes less power (limiting the need of heat sinks); this allows smaller power supplies. Check the forums and read a few reviews, you'll zone in on a few pieces very quickly. It seems neither the Rotel nor the Quad are class A which makes me wonder why the thread is A vs D rather than AB vs D, AB being a common well established topology whereas A is very low efficiency and a fringe product. He really felt such amps should be left in their class A/B setting. That to really hear the difference a true Class A amp makes, you need an amplifier designed as a Class A amplifier outright, something more like the Pass amplifiers. A short answer would be, don't worry, a good representation of Class A, A/B or D could do a good job in your home theater. Also bei meinem trace Ah-1200 der wohl auch Class D ist, vermisse ich keine Leistung. Ok, hat auch einen fetten Ringkern Trafo und wiegt 25 KG aber kein Vergleich zu meinem ampeg Portaflex 500 (meine erste Class d … I have read alot about the advantages of Class A.amps Though an older amp design, do class A amps necessarily sound better than Class D digital amps like Nu-Force, Bel Canto, and Wyred4Sound? Amplifier Classes D to T. There is a variety of different amplifier classes which tend to be based upon switching techniques rather than using analogue approaches.