As a former Maggie owner, a couple of comments:
1) Dipole speakers interact differently with rooms than box speakers. Positioning is critical and, sadly, some rooms are just not a good fit for Maggies. That's why I sold mine -- I moved and the room in the new house just didn't work for them.
2) The position of the volume knob on the amp tells you almost nothing about the amount of power being used. That is dependent on the voltage output of the source and the input sensitivity of the amp. My volume knob is generally at 2 or 3 o'clock for a listening volume of around 85 dB. That's my "loud" while others prefer to list at 95 dB or even over 100. With a different source/pre/amp I might being hitting the same actual volume with a much different setting on the volume knob.
3) Maggies are a low-impedance load at 4 ohms. A typical solid state amp puts out the same voltage at 4 ohms or 8, but the amperage (current) doubles at 4 ohms. The simplest test to see if an amp is good with Maggies is to check to see if the amp's wattage rating doubles when going from 8 ohms to 4. Many amps don't do this. You didn't say which make/model of new amp you bought. You also didn't give any indication of your preferred listening volume. As noted above, one person's "loud" is another's "moderate."
