Green Mountain Audio

The woofer is ScanSpeak 21W/8552 Classic. Tweeter is also Scanspeak  D2010/8513. The midrange is Eton 4-203/25 HEX. The tweeter is still available in a slightly different form. Drivers look high quality. The surrounds were cheap and May attempt this. I have a message into Madisound asking for compatible drop ins. The marble is just ugly for my tastes but the design is very cool and with a proper high end veneer job these could look exceptional. Also will polish the aluminum around speakers to see if I can mirror it. The drivers all have a part number sticker- Kxxxx where the X’s are numbers. Assume these are GMA part numbers. the foam diaphragm covering the tweeters have pinholes- not sure how to deal with that. I only bought these because I know Roy was a gem and didn’t want these to go to the waste bin. 

I'm sure when you get them sorted out you will be quite happy with them.

How much do they weigh?

They are 2 piece and really heavy. I would guess 100 pounds each. 

Contact Scanspeak, give them the model #s and see if they have any or if there’s a very similar or maybe even improved version.  Start by going to the source. 

Speaking as a woodworker, veneering marble isn’t that straightforward. Since you are only doing one side, and since the affects of environment on marble and wood are very different, choose wisely and test. A self-balanced veneer - two sheets stacked in opposite directions - is more stable than a raw veneer. A paper backed veneer is even more stable. Marble is a strange product with adhesives - so contact cement may be out. I use heat lock - but have no idea how it would work with the marble.