Originally Posted by grigorianvlad
Another question. When would you place tweeters on outer side, as opposed to inner? I suppose outer makes more sense if they are close to each other
Here are some other considerations on tweets in or out with Maggies.
1) there is the issue of side wall reinforcement. In a relatively narrow room, the side walls can reinforce the bass and reflect the highs. Thus woofers out can lead to substantially more upper or mid bass. Tweets out can run into imaging problems if too close, especially with minimal toe in. Thus, tweets in or out can lead to substantially different sounds in a narrower room.
2). Tweets out obviously stretches the imaging. In a narrow arrangement this is probably very desirable or even necessary. However, once the speakers are fairly widely separated it seems to also stretch the images of individual instruments and singers, all else equal. In other words, it can fatten the individual images. This may be desirable or not. In general, again all else equal, tweets in tends to lead to more pinpoint imaging and tweets out to larger images. Some suggest tweets out also stretches the listening seat sweet spot, which may be a consideration in HT.
3). Tweets in vs out is also related to toe in. The degree of toe in influences frequency response, timing between highs and lows, and as above wall reflections (lots of toe in reduces side wall bounce of high frequency.) It also changes the balance between direct sound and the reflected sound off the front wall. Finally, toe in can influence bass, as lots of toe in excites side to side bass waves, while little toe in excites primarily just the front to back.
Toe in relates to tweets in or out in that optimal toe in for your room and tastes is going to differ, potentially dramatically whether you go in or out. Tweets in usually or at least conventionally* calls for substantially more toe in.
IMO, there are benefits in getting proper time alignment between bass, mids and highs (with the recommendation usually being to put the bass closest to the listener and the tweets furthest) In my room this means I need about a 45 degree toe in for tweets in, but very little toe in for tweets out. Again though there are lots of tradeoffs.
There are also interesting tradeoffs with the balance between direct and front wall bounce. With no toe in, in my room I reduce the direct upper midrange, and simultaneously increase the midrange energy bouncing off the front wall. This pulls the image toward the front wall and away from the speaker and leads to an extremely pleasant holographic imaging and depth. But at the cost of changes (positive or negative) of midrange balance.
Tweets in or out is extremely complex and both room and preference dependent. I have gone both ways, but when adjusting it changes all kinds of parameters.
Hope this helps.
* consider googling "Limage" or "Roose" for some of the many non conventional Maggie set ups or toe in recommendations.