Is bi amping worth it ?

• @hardhattg @russbutton 
• I mistakenly described my set up as vertical bi-amp. I was wrong, and am using horizontal bi-amping. We were having discussions about the various methods of wiring speakers and it got me to thinking that I might not know what I was talking about. First time for everything I guess. :) I now have to wonder if doing the vertical set up would help in some way. Worth a try. All I know for sure is that doubling up the power to my old speakers made a world of difference. It may not in a lot of newer speakers or with newer amps. This seems to be how Paul McGowan feels about it anyway. 
• Note to OP, I also checked my AR9 owners manual and it does address this, offering both methods of bi-amping AR9's. It goes on to say that the AR9 was built such that the woofers and the mid/treble section have equal power requirements and it is critical to use two equal stereo amps or 4 equal mono amps. It also says to never attempt to disable the crossover or ever use an external one. 
• I also read the specs and while the range is given as 18hz to 30khz, it does say that they are off by -3db at 28hz. Just how these measurements were made, I have no idea. All I can say is that the bass literally became twice as good by adding a second equal amp.
• BTW, site is really dragging again today. 

I have used a McIntosh MC206 6 channel to biamp AK6 Khorns and a center Heresey.   I'm very happy with the bass and overall sound.

Nope. Next question.

As I posted above - mutli-channel amping makes a huge difference in the sound.  You only have to listen to the Linkwitz or Legacy Audio speakers on Youtube to confirm this - nothing quite matches them.

But - few people have the engineering knowledge and skills as Linkwitz and Duddleston (Legacy) - it is a frustrating experience for those who do not have their knowledge and skills to even come close to achieving such improvements in their sound.  

Don't do it - just buy one of their systems and be happy that you did!

Update :

after asking this forum about bi amping to pull a little more bass out of my speakers.  I became quite intimidated and also it seemed clear I would need to add another two channels of amplifiers to bi amp correctly . I decided to purchase a stereo pair of subwoofers.   Specifically REL 212 .  Beautifully crafted subwoofers.  I was a little worried with the (4) twelve inch speakers in each sub that they would be overpowering ( two drivers and two passive ) but with the high level connection , one to each mono block . These subs fit in perfectly and if they weren’t so large and hard to miss I would swear it’s just a bit more bass coming from my khorns but bass you can hear much clearer and feel a lot.  
 

it has been the perfect addition . Just what I was hoping to accomplish.  So I am totally satisfied with the sound of this system as of today.  I fear that satisfaction won’t last forever as it never does.