Outlaw RR2150, a stereo receiver has bass management features.
Also pre-outs. Too bad it is only about 700$.
Emotiva, of quality unknown, makes a fairly inexpensive preamp which also has bass management built in.
I don't know if either are 'stereo' output...
don't forget that bass below 80hz is summed/mono, anyway.
I use the preouts on my PSAudio GCC250 (integrated) to drive a sub and use its crossover while running the mains full range.
Also pre-outs. Too bad it is only about 700$.
Emotiva, of quality unknown, makes a fairly inexpensive preamp which also has bass management built in.
I don't know if either are 'stereo' output...
don't forget that bass below 80hz is summed/mono, anyway.
I use the preouts on my PSAudio GCC250 (integrated) to drive a sub and use its crossover while running the mains full range.