Personally my recommendation to everyone on WBF is to save yourselves $740K and spend the remaining $10K on a Quad 2812x
As Peter Walker famously said 40 odd years ago, designing a loudspeaker is a problem in physics. At the end of the day, you input a voltage and the speaker puts out a sound pressure wave that your brain interprets as music or speech. Now what is absolutely critical here is that the distortion be as low as possible. Fundamental physics dictates that the drive equation for a constant charge electrostatic loudspeaker is linear. In plain English, it means that if you double your input voltage, the speaker puts out twice the pressure. If you halve the input voltage you get half the pressure. Anything else is distortion. The Quad 2812 (and its ancestors leading back 43 years ago to the Quad 63) are so linear that the famous microphone company Bruel and Kjaer use them to calibrate their microphones. These Quads are phase linear as well.
I don’t want to sound cruel here to what is obviously a labor of love and passion, and these Italian made speakers do look pretty (the earlier versions look nicer to my eyes). But as they say often in Washington DC, you can put lipstick on a pig, but at the end of the day, it’s still a pig. You can put as much gloss on the design of a moving coil dynamic loudspeaker as you want, but there’s no getting away from the fact that the drive equation is horribly nonlinear. It’s not phase true. Feed it a square wave and you get hash as output. The Quad 63 was so linear that to test each sample at the factory they just fed it a square wave out of phase with a carefully tested reference test model. If you put a microphone in the middle and the square waves cancel, you pass the sample. Don’t try that with this monster!
Here’s my advice to each and every member of WBF. Get a pair of Quads if only to remind yourself what a low distortion linear loudspeaker should sound like. It’s like keeping a calibrated monitor at home to remind yourself what true color reproduction should look like. I have three pairs of Quads that I would not sell even if you paid me 10x their list price. Sure, I listen to dynamic speakers (I have several at home) and a pair of Klipsch La Scalas. These go much louder than my Quads but you lose much of the coherence and the phase linearity.
You can spend millions on loudspeakers or amplifiers or servers or even cables. But at the end of the day there’s no getting around basic physics. Peter Walker once said he didn’t know how to design a better loudspeaker, by which he meant one that outperforms the Quad 63 in terms of its primary virtues: phase linearity, low distortion, flat frequency response, low energy storage and controlled directivity through an ingenious delay line system to approximate a point source.
The hifi world is still waiting for a breakthrough in loudspeaker technology, one that will be as linear as even basic 16-bit digital recordings. Moving coil dynamic speakers are not the solution, IMHO, no matter how many billions of dollars you throw at them. The physics doesn’t work.