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.

128x128chungjh

I’ve had Planar speakers since the early eighties and still have a pair of Acoustat Model X’s. The midrange and the High-end are fabulous! The low-end, while accurate, has no push to it.  If I play the beginning of DSOTM loud, the heart beat goes rattle rattle, rattle rattle, because it can’t produce the umph of a traditional speaker. I’ve made a bunch of subwoofers over the years and have an old Audio Research EC-2 crossover, but have never got it quite right. The ripple of the Mylar is so much faster than a moving cone!

All the best!

JD

If by “clarity” you mean an absence of resonance that makes for a murky or muddled sound, panels and compression midrange drivers can be very good.  The very best compression drivers, such as those made by Western Electric, International Projector Company, YL, G.I.P., Goto, manage to substantially avoid nasal resonance that color some compression drivers and deliver clear, detailed and well textured sound with a sense of ease.  These drivers must be matched to very nimble and clear sounding woofers.  The woofers that seem to work best have light cones, and pleated paper surrounds.  The downside to such woofers is a limited excursion that mean they don’t deliver extremely deep bass.  This kind of bass is similar to that of large panel speakers which also don’t go extremely deep.   

Larger speakers play louder, but the Magnepan LRS is really a remarkable speaker and its accuracy is quite high, in my opinion. I am a musician (guitar, mandolin, uke) and regularly play five time per month with a group. My experience is with 3 models of Maggies, and a friend has some Martin Logans. I have built may and use open baffle speakers in my big system. Large doesn't necessarily mean more accurate.

I do not know if they do or not, but I really like my Maggies MGIIIa.  I enjoy the sound much more than box speakers.  I really do not care about deep strong bass; the Maggies produce nice clean bass and enough for me.