Amp sub crossover and a sub crossover


My McIntosh preamp has a switch for the sub to cross at 80 hz---and my Velodyne has a variable crossover. So if I want to cross at 80hz. Should they both be a 80hz???Where should the Velodyne be set??
vernneal
Set the Velodyne crossover to its highest frequency setting, letting the preamp take care of the crossover duties.
I agree with Altbrewer,

By trying to use two electronic crossovers at the same time you only risk having more phase issues and lesser quality sound.
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