You probably know that very long microphone cables are common at performance venues.@bommerbillone The reason this works for microphones and not cartridges is pretty important! Microphones are typically driving an input transformer which is properly loaded on its secondary- eliminating any issues with electrical resonance. Microphones also have considerably more output. You might want to take a look at this article, which shows what the engineering issue is with electrical resonance:
http://www.hagtech.com/loading.html