I disagree with some comments that full range ribbon planars need volume to shine. This is a matter of the amp providing ample current. I have the Apogee Duetta II Signatures (about to be completely updated by Music Technology). They sound excellent at very low volumes as well. The whole frequency range is full and very engaging just as it is at louder volumes. I’m using a beast BAT VK-600 solid state amp with bat pack for extra joules of energy when needed (coupled with a BAT VK-5i tube preamp). Don’t get me wrong the large panels such as the Full Range and Diva are also very special speakers, but they have added challenges where they tend to have a dark sound to them if not optimally matched with the proper amplification and cabling. Also, they are more sensitive to the listening space and require a large room to truly shine. While the Duetta Signatures go down to around 28 Hz (stock) the FR and The Diva go to the lower 20s. These large panels also need multiple amps and with that comes the added expense and additional layer of complexity trying to get amp synergy. I like the flexibility and relatively forgiving nature of the Duetta Sigs. One thing I will say is like all Apogees they are very sensitive when it comes to speaker cables. I’ve always used the Symos Jason Bloom recommended and have been extremely happy with them since ‘88.
Do larger planar speakers produce more accurate sound?
Planar speakers generate sound pressure via vibrating membrane panels. The excursion of the membrane x radiating area= sound pressure. This would mean that for a given sound level, membranes have smaller excursion in larger planar speakers than in smaller ones. Does this mean that larger speakers will produce more accurate sound?
I am not talking about the obvious benefits of the larger speakers in terms of low frequency production, so let's not get into that.