Does anyone know where I can find a Test CD Track that is recorded at 0dB at 50Hz (for measuring a subwoofer amplifier,) and another track that is recorded at 0dB at 1kHz for measuring a midrange/tweeter amplifier. I will be measuring output voltage with a volt meter, then calculating amplifier power in watts with the Voltage x Voltage Divided by resistance formula. Thanks in advance to anyone that knows how to create these tracks, or where to find them.