How long should speaker cables be?


My cables are 12 feet long but with my current setup 6 feet would be more than enough. I recall reading somewhere that connectors should be short and speaker cables should be long. Does anyone have an opinion on this?

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With solid state amps (negative output impedance) the less R between the amp and the speaker, the better real world damping factor you will have.  

Naim recommends 3.5 meters minimum for proper inductance and capacitance.