Speaker height...should known better

When I bother to talk about this, yes, below the tweeter is often a better location to hear music than on tweeter axis.  Same for no toe in vs. direct. 

I often feel for instance that B&W speakers are designed to be heard on mid-woofer axis instead of tweeter. 

Even as a speaker designer, we sometimes try to make a speaker crossover optimized for on-tweeter listening but find that below is better when built.  This has happened to me and the famous Troels Gravesen as well.  You should always listen for yourself to find the right listening height / speaker tilt. 

I appreciate all the responses. I am going to try an elevate the speakers a few inches higher by probably getting newer stands since changing chair height is irrelevant right now.

@bimmerlover I think these have a good vertical dispersion to a point they are sensitive to slight height difference. The problem I notice as I mention earlier is that high frequency drivers were below my ear level but visual perceptionfrom the listening position was not like that.

@erik_squires I feel I have that perception with my speakers. 

Remeber that you can just tilt them.  I've had good luck using relatively inexpensive wooden stands from Butcher Block acoustics with adjustable feet. 

Interesting how different standmounts can be designed for different heights. I have Marten Parker Duos and their stands are 30" from the floor to the base of the speaker. My ears are level with the lower part of the bottom speaker, not the tweeter, and it sounds awesome, with a very tall, deep soundstage. I've tried sitting on padding to bring my ears up to tweeter level and that did not sound right at all.... I realize this is very unusual design, but it works! Their other standmounts, the Oscar Duos are more traditional ear/tweeter setup. 

I know this isn't possible for some speakers, but I found that laying mine horizontally instead of vertically resolved that issue for me. That way all drivers are on the same plane, and with the tweeters on the outside, the soundstage widens considerably. I tried many combinations of height, toe in, and spacing with a vertical orientation but found horizontal at about 38 inches above the floor is best in my room.