1. Copying from one analog medium to another reduces the quality no matter the quality of your equiptment 2. All analog media decays either by time (the physical medium decays) or by playback (physical contact with head wears it down) That means that no matter what eventually your original recording will be destroyed. However, you can take a WAV file and copy it digitally 1:1 many times. This includes backups and moving to different storage media.