Question about speaker angle

Magnepan recommends very very little toe-in, extremely dependent on design and room. But best place to start is again, owners manual. You think they write those things for their health?

As others have said, entirely depends on the speaker. But keep in mind in order to get a sound stage, or a wider sound stage… Sometimes you have to reduce the tow in. I had such Cornwallis before I had Harbeths, and the Harbeths are totally different animal. I had them towed in as you described, and I was getting booming bass, and virtually no sound stage. I reread the manual again, and discovered that in fact they are supposed to have very little tow in. And sure enough, in flattening them out , they totally blossomed. Experiment! Your ears will give you the answer.

I start with Harry Pearson's Rule of Thirds when setting up speakers;

Divide room width by 1/3, divide room length by 1/3,

Put speakers where the 1/3 width/length points intersect,

Speakers firing straight ahead.

Works perfectly 9/10 with direct radiators, dipoles, bipoles etc.

Even pesky omnis.

😄

I'm happy to report that my Walsh don't present me with where to aim my toes. *S*

My other speakers?  Tweak as desired, but ones' space will rule the day.  It can make for a musical weekend...although getting up 'n down to dial the degrees of in~out can feel like a marathon of up 'n down physically. ;)

Any and all of the suggested means are appropriate, as the room ultimately rules.

Pick some selections that suggests the 'air' that you're hunting for and have at it.
Mild introduction of ones' fav beverage or inhalation therapy to ward off the physical demands required can be helpful. 

Advising ones' significant other' that these events are about to occur helps.
SO may bail, endure, or seek a seat as desired.
Opting for the first may involve 'expenses' as you may have already experienced. ;)

Have fun, J