Good luck hearing anything in the neighbourhood of 40 KHz. It wont happen. Depending on age, you are lucky to hear anything above 12 KHz. A lot of audiophiles are in denial over this. I don't think they ever went to an audiologist for a test. One suggestion: try to learn about audio starting with the basic (aka "scientific")stuff. Once you achieve a measure of this, you can go into the audio deconstructionist philosophy adopted by almost all "subjective" audiophiles in TAS, etc and on sites such this one. Good luck.
