Making speakers “disappear”…..

The equilateral triangle should be considered a guide or a starting point. What works for some users in some rooms with some speakers may or may not work for you. The experimental process should be fun and not a chore. When you discover a placement you like, mark it with tape on the floor or document the dimensions and see if you can make any further improvements from small adjustments. If not, go back to your preferred positioning. The stereo image coming from your amp between the speakers is actually what you are striving for. If this bothers you, move the amp as you said or even better listen in the dark.

If possible, some treatment usually helps. At least first reflection areas on sidewalls 

Cheers iseland…..yes, I bought thick curtains for three walls, a pair per side so I can open to various degrees in the event of the curtains deadening the room too much. Still got work to do on room treatment/experimenting.

@thomastrouble 

As @newbee suggested a little bit more distance to listening position might work better. I’ve read (and this works for me) the distance between tweeters is 1 and the distance from tweeters to ear is 1.2. Your room will be a big factor in final placement as noted above. If the amp is distracting you I recommend closing your eyes and dimming the lights when you listen. Then it’s just you and the music. 

As per Jim Smith, try to make the distance from Tweeter to Tweeter somewhere around 80-83% of the distance between each Tweeter and your ears when in your listening spot. Looks like a similar formula right above.