You do not need the same amp for top and bottom, you can have SS for the woofer and tube for the top or 2 ss amps that dont match, as long as atleast one has gain control that will allow you to match output to your taste, I am Bi-Amping my VMPS (wich is designed to be Bi-Amped, I also Bi-Amped my Innersound Eros (both use an outboard cross-over.
Although there is alot to be said about keeping it simple Bi-Amping allows you to get the sound you want in the Mid and treble regions that one amp may not provide, ofcourse one great killer amp will provide great results.
I use a high power Carver for the woofer and an Aragon for the mids and tweeters. I also like the gain on the bass amp because it gives you some bass adjustment for various recordings and moods.
Although there is alot to be said about keeping it simple Bi-Amping allows you to get the sound you want in the Mid and treble regions that one amp may not provide, ofcourse one great killer amp will provide great results.
I use a high power Carver for the woofer and an Aragon for the mids and tweeters. I also like the gain on the bass amp because it gives you some bass adjustment for various recordings and moods.