I went with the Dayton Audio DSP-408, 4 RCA inputs, 8 outputs. Extreme flexibility in adjustments; x over, mixer, delay, and eq. I opted for the Bluetooth dongle, which allows adjustment at my listening position via an app. Or adjustment via laptop and USB. The x over has adjustment for high pass and low pass points, slopes up to 24db, polarity, and more. Eventually, I substituted the wall wart for a LPS with substantial improvement.
Electronic cross-over on pre-amp out, to split signal to subwoofer and bookshelf speakers
I have a 50 W amp for 86 dB bookshelf speakers.
I really want to keep both amp and speakers.
My idea is to have an electronic crossover on preamp out, split the signal say at 80 Hz - Send the lower electronic cross over out to a subwoofer. Send the high crossover out to my existing 50 W power amps.
This would extend speaker frequency range to subwoofer capability - say 25 Hz, reduce the power amp load and allow to play the bookshelf speakers a bit louder,/ have more headroom.
I am sure others have already done. What cross over did you use? Was it successful?