Hello, I'm building a class D amplifier for my school project and I need a lot of help because I'm so lost. The amp uses 12Vdc as its input, the frequency range I'm trying to get is 20Hz to 20kHz, the speaker is 4 ohms, and I'm trying to get as much power possible without the use of a DC-to-DC converter. I've been using CircuitMaker2000 to simulate my circuit. Please tell me what I'm doing wrong, since my H bridge does not work at all. Thanks.