Most expensive

The most expensive that I can think of are the Kharma Grand Enigma. I believe that there is only one pair, and they were installed in an underground room (large domed ceiling) somewhere in Europe. The price was quoted as 1 million dollars. I think you can google a picture.

No such thing - there is always a bigger fool - so today's most expensive speaker on earth will be surpassed.

FWIW - room acoustics quickly become the most limiting factor for sound quality. You can't put lipstick on a pig (the most expensive speaker on earth is never going to make a bad room sound wonderful)

Polk, Finding out which is the most expensive should be a fairly simple task. If you want a challenge, try to discover which offers the most performance.

Polk432,
I can answer your question partially by the link to this thread:

http://www.bornrich.org/entry/top-10-luxury-speakers-everyone-cant-afford/

Take a look @ these speaker system prices. You are sure going to fall off your chair! ;-)

Where can you hear them??
Well you can hear "lower-end" (if such a thing exists as even their lesser priced speaker are obnoxiously high priced!) Kharma at RMAF.
You can also find a Wilson dealer near your area & hear one of their products.
Ditto for Cabasse, Magico & Eggleston.

I have a custom design. I will offer. You sit inside the loudspeakers, this totally removes room problems, designed as a self contained, self powered outbuilding, Features all horn 7.1 system, self powered, off grid. System includes all amplifiers and sources. Sat cable,blue ray, sacd, dvda, LP, cd, hard drives, custom self biasing SET tube power amps for mains. Seating for 6, customized decor, 60in LED Hi Def TV plus 32in LCD TV. Also includes composting toilets, rain harvesting system. Green construction. If site allows design can be upgraded to power owners home. Total $2,000,000 plus tax, license fees any local taxes or permits and optional upgrades. Many options, ea will be unique to owner. Can up size to make a main residence, not a joke Ive worked this all out including costing. Was looking to build for my own use but the cost;) aarrrgghh Email kcsloudspeakers