Speaker Tilt Back benefits?

>The tweeter cone has much less mass than the other drivers, so they propogate sound faster than mid-range or woofer drivers.

While driver mass effects efficiency (that whole force = mass * acceleration thing), it has nothing to do with how soon the sound waves from a driver will reach you.

The other drivers are deeper than a tweeter so their acoustic centers are logically farther back.

Angling the speaker puts you closer to on-axis which will increase tweeter output at high frequencies. It will put you closer to the zero delay plane where output will be maximal for a speaker with Linkwitz Riley even order cross-overs or where odd-order cross-overs sum flat (you get a 3dB peak off-axis).

Slaw3.I have a pair of NHT3.3 speakers which I have had for eight years.My biggest complaint regarding these was I always felt the soundstage to be to low in height .A year ago I put long screws thru my front supports into my spikes. Then I experimented tilting the speakers back. The screws I used were 5 inches long and after about two weeks of trial I found at 1.33 inches in lift I got the soundstage to lift in height about 18 inches any higher and I lost depth to the sound stage. After I was happy with the height I took a inch and a half dowel cut it to length drilled a hole thru the length painted them black cut the screws to the correct length. They look like they came this way.My outriggers or bars as you call them are threaded so for less than a dollar you can experement for yourself. Sorry I waited so long before I tryed this.

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