You don't need an external active crossover to bi-amp. Merely using separate amps to each binding post does not require an external active crossover, BUT there's much less to gain if you don't go active. This means separating the bandwidths *before* amplification AND bypassing the passive XO in the speaker between woofer and midrange.
There are a few off the shelf electronic crossovers and others that are can be custom ordered. You will need to know crossover frequency and slope for the VS4jr in order to do this.
Highly recommend that you fully investigate what you are getting into before tackling this.
There are a few off the shelf electronic crossovers and others that are can be custom ordered. You will need to know crossover frequency and slope for the VS4jr in order to do this.
Highly recommend that you fully investigate what you are getting into before tackling this.