Horizontal bi-amping for 3a Signatures


I have a pair of PS Audio HCA-2 amps that I am currently using in horizontal bi-amping for my current speakers resulting in an improved sound. I also have a pair of Vandy 2wqs. I have almost certainly decided to purchase a pair of Vandersteen 3a Signatures. I am almost certain I read in one of the Audio Perfectionist Journals by Richard Hardesty (which I dont have access to the copy that made the reference to which I will refer)that audio nirvan is attained by employing horizonatal bi-amping for the 3a Sigs.

I just read the 3a Signature manual and it recommends Horizontal bi-amping. As i read further in the manual, even though it doesnt say not to do horizontal bi-amping specifically, it only gives wiring diagrams for bi wiring and vertical bi-amping. Vandersteen goes further to say, the improvement for bi amping is minimal and suggest the "BEST" thing to do would be to buy the best single amp your budget can afford and bi-wire.

My problem is that PS audio does not recommend to use the HCA 2 in the mono block configuration.

Can anyone clear this up please?
Signed confused owner of apair of HCA-2s.
kyneo
Vertical bi-amping works just fine and there are some considerations that make it appropriate. For example, If you already have one good amp and can get a match at a good price.
I used a pair of Counterpoint SA-220s to vertically bi-amp my 3A signatures for years. It sounded amazing.
I noticed Swampwalker and Nickword posts refer to "vertical biamping" For clarification, I assume that you are using a mono block for each channel right?
Vertical biamping in my case meant one stereo amp per speaker with one channel driving the high end and one channel driving the low end.
I'm currently running a pair of McCormack DNA-1 DLX Rev A's vertically driving my Vandersteen 3A Sig and they sound incredible. I use a McCormack TLC-1 DLX with the passive output driving the high/mid section and the buffered output driving the low section. With this set up I get the best of both world passive and active. At one point I was driving these with a pair of DNA-1 monoblocks but I found I get better resolution and detail with the vertical biamp and the passive preamp. I'm willing to bet if you experiment a little you will find the vertical biamping will work better overall.