Am I wasting money on the theory of Bi-amping?

Never heard of horizontal and vertical bi-amping. 

My assumption for passive bi amping with speakers built for it always was that by removing the 'bridge', I get a low pass for the woofer and a seperate high pass for the mid/high. The use 2 amps to feed those. 

I now assume that horizontal/vertical deals with the option of using 2 stereo amp for the 2x2 'feeds'. Either one stereo amp for each SPEAKER or one stereo amp for the woofers and one stereo amp for the mid/high. If that is the case, what is considered 'vertical'?

I read a few posts claiming BENEFITS of passive crossovers (vs active), but none mentions issues like phase shift from those passive components. 

And can't those mentioned 'beneftis' of passive crossovers not 'simulated' or realized in active crossovers as well? 

@kraftwerkturbo wrote:

I now assume that horizontal/vertical deals with the option of using 2 stereo amp for the 2x2 'feeds'. Either one stereo amp for each SPEAKER or one stereo amp for the woofers and one stereo amp for the mid/high. If that is the case, what is considered 'vertical'?

'Vertical' bi-amping is one stereo amp driving one speaker, its two channels divided over the two pairs of terminals on that speaker. 

I read a few posts claiming BENEFITS of passive crossovers (vs active), but none mentions issues like phase shift from those passive components. 

And can't those mentioned 'beneftis' of passive crossovers not 'simulated' or realized in active crossovers as well? 

Active can do what passive does, and more - while not least getting out of the way between the amp and speakers. 

I knew 2-3 people would show up here to drop their snark-bombs on the topic of biamping, and I wasn’t disappointed.

It has been many years since I biamped, but when I did, it was a noteworthy success. It probably would have sounded even better if I’d had access to one of the excellent, transparent external crossovers that are currently available, but were not back then.

Obviously biamping isn’t possible or recommended for certain setups; but in the right setup, and with the right amps, it can take the sound way higher...

Benefits of Active Bi-Amping (Not Quite Magic, But Close) - Part 1

Phase Response. See article below:

Mike

https://sound-au.com/bi-amp.htm#phase_resp