With an active electronic crossover you can use ANY crossover point because the signal is divided. If you just add a sub, you will have overlap which may be perfectly OK, but in some instances will cause problems integrating.
In general, with good speakers, you should dial in the subs around 40, maybe 50 Hz if you like extra punch.
If your speakers have a woofer to midrange crossover at 100-200 Hz, you would hardly be using your mains woofers at all if you crossed your sub in at 80-90 Hz.
Last edited by GaryProtein; 04-04-2018 at 01:25 PM.
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