Magnepan MG 20.1 - Manual (Page 8)

With the crossover points set as listed above, the power requirements for
the bass and mid/treble amps are nearly the same. Therefore, use amplifiers of
similar power rating. It is suggested to use amplifiers rated at 100 watts RMS or
greater, into 8 ohms.
Some amplifiers invert is phased correctly between phase and this test
serves to double-check the entire system the bass and midrange.
12. SPEAKER PLACEMENT
Proper speaker placement and room acoustics can have more effect on a
music system than upgrading one of the components in the system.
Unfortunately, there is no definitive guideline which will cover all possible
listening rooms. Some experimentation is required for locating the optimum
position. The following are a few general guidelines:
TWEETER PLACEMENT
Room acoustics and your own personal tastes will determine whether to
position the panels with the tweeters on the inside or outside edge. In most
rooms placing them on the outside will give good dimensionality. Placing them
on the inside will, in most cases, increase the central focus and improve imaging.
For proper phasing between midrange and tweeter, the speakers should be toed
in slightly. Align the foot below the tweeter with the listening position as shown in
Figure 3.