Speakers for a large vaulted room?


I have a listening room that is new to me. I have had trouble with my gear in this room and I want to see if anyone thinks the speakers will make a difference.

First, the room is rectangular with a brick fireplace flue that goes floor to ceiling pretty much dead center of the room. from front wall(speaker side) to back wall; a distance of 23'. I sit with my back to the 2 1/2' fireplace with all the empty space on either side of me. The walls on either side of me are 16' apart and only 4 1/2' tall then the ceiling take over and goes to a 12 or 13' peak.

Second, I am using an SP-6 preamp, V70 power amp from audio research and Magnapan IIIa's. I realize that the Magnepans need more power so I wanted to go with PSB Synchrony one's.
sonorous1
It will make them sound louder... not necessarily better.

Come to think of it, they may not even sound louder because volume level drops off quicker with increasing distance from the speaker when comparing a planar line source to a standard cone speaker system.
Volume is what I wanted to solve first, power is an issue for me I only get 70 watts a side, I don't listen loud, which is ideal, but some classical music or albums with a large dynamic range will clip. So the room size and the speakers I thought were my first concern. As I said, I'll change anything besides the amp and preamp.

So, even a more efficient speaker in terms of power needed wouldn't help me? What can I do?
The PSBs are going to be totally different than the Magnepans. I would say a bigger amp or bigger Maggies. Not sure if the bigger ones are more efficient. Other choices would be Soundlab Dynastat 88db or Emminent Technology LFT8 still 83db though. Should have more bottom end being a hybrid design. Very directional, so seating position small for the best sound. There are a number of choices from Martin Logan now too. Depends on budget.
"So, even a more efficient speaker in terms of power needed wouldn't help me? What can I do?"

A more efficient speaker will indeed help you; the PSB Synchrony One is not a more efficienct speaker, or at least not significantly so. The Synchrony One is a 4 ohm speaker with a 2.83 volt sensitivity of 88 dB @ 1 meter. Converting to watts, that's an efficiency of 85 dB/1 watt/1 meter... certainly not "high efficiency".

Big room... unrestrained dynamics... 70 watts... 92 dB speakers will get you there... imo, ime, ymmv, etc.

Duke
dealer/manufacturer
Another room that screams for horns another owner who will just place another inefficient dynamic design and wonder why it does not sound so great.