Speaker Tilt Back benefits?

Tilting up or down, toeing in or out, moving closer or further apart, back or forth, etc., will affect tonal balance - and equipment and room acoustics will have a big effect. Whether there's a benefit depends on your preference. Whoever recommended tilting back probably noticed a positive effect; you may or may not. Another way to look at it is: if Audio Physic thought it would be a benefit, they would have incorporated it.

As far as titling back the speaker to "align" the drivers in order to increase the distance of the tweeter to that of the lower driver in an effort to get the sound waves to the ear at the same time is probably not going to be of any significance for the Virgo. The drivers are so close together that it may be a futile exercise - moving your head up or down a half inch will have practically the same effect.

Nothing wrong in experimenting, though.

Thanks, y'all!
I'm buying new spikes because the old set was lost in a move, and I was using inferior and cheap spikes - had one of those "aha" moments the other day and realized new spikes would probably improve the sound quite a bit. I've just tried just tilting them back a little using some mouse pads under the front outriggers, and I liked the sound; seemed to be a little more airy high end and better rhythm to the music. Could be some of that time align theory at work, or just a better balance for my room as GS5556 suggests. I'll try it with the spikes when they arrive and report back!
jSlaw

The Mapleshade speaker stands utilize a tilt, and the stands are really a misnomer as they are a few inches off the floor. When used with the Reference 3A de Capo i's this improved the bass response and soundstage and the sound just got better from these speakers. L'wood

Some speakers have tweeters below the woofer, and some (MTM) have the tweeter in between two woofers.

Tilting speakers back reduces the LF bounce off the floor. It also discourages people from setting drink glasses down on the top.

What sounds better will largely depend on your room acoustics, listening position and the vertical dispersion pattern of the speaker. There is no "rule of thumb" for this....just experiment. If a slight tilt makes a significant difference then this would indicate a problem somewhere....either room acoustics or the speaker. In this case, you may want to try to fix the root cause....