I do not have two of the same amps, so I have to go the horizontal route.
I have two Krell stereo amps. Dan D'Agostino prefers vertical biamping.
I am using The Krell KBX active crossover with my B&W800's and the improvement over just using one amp is staggering! But, remember, I am actively bi-amping which requires alteration to the speaker (Dan D'Agostino designed the change). This was a very expensive upgrade, but worth every cent!
I would consider improving your speakers BEFORE going to expense of an electronic x-over.
Just my opinion
Richard
I have two Krell stereo amps. Dan D'Agostino prefers vertical biamping.
I am using The Krell KBX active crossover with my B&W800's and the improvement over just using one amp is staggering! But, remember, I am actively bi-amping which requires alteration to the speaker (Dan D'Agostino designed the change). This was a very expensive upgrade, but worth every cent!
I would consider improving your speakers BEFORE going to expense of an electronic x-over.
Just my opinion
Richard