I'm not being rude, but people are asking sensible questions that are designed to produce useful answers from somebody a little green. You don;t seem to be putting any effort in to understand what you have, how it works and the science. The local music shop might be able to tell you what is wrong because they can substitute alternative parts. Cables - they either work or are faulty. Reviews on cables usually make no sense at all. The only things different between cables are really basic things. What happens if you run a heavy flightcase over it? Do the connectors latch properly, and not bend when you stand on them - but most importantly, condenser mics squirt 48V down two of the conductors AND the screen. So any one that is disconnected or high resistance can cause grief - either no signal, or a reduced one, or even cause weird noises! A good review means absolutely nothing. They still fail! Mics can develop faults. So can your preamp.
We have asked for an example of the 'weak' sound - we have no idea what this sounds