cheap or expensive cables could be compromised by where they run. ie: how close your cables run to household electrical wires and HVAC equipment., what else is sharing that circuit. Audio Research had an interesting study done decades ago about the necessity of running a dedicated circuit to your equipment from the breaker box. 60 cycle interference, motor starting loads called LRA (locked rotor amps) , backfeed from other household appliances, etc. distorted performance.
Running your cheap or expensive cables too close to high voltage wires is discouraged by higher end cable manufacturers.