Grand Karma Enigma $1,000,000.00 USD
Moon Audio Opulence $1,100,000.00 USD
Transmission Audio Ultimate $2,000,000.00 USD
Cessaro Horn Acoustics Omega 1 $1,000,000.00 USD
Kipnis’ Outer Limits Theater $6,000,000.00 USD
Kharma Enigma Veyron 1D $1,500,000.00
...and last but by no means least:
Hart Audio D&W Aural Pleasure +/- $5,000,000.00 USD: features a 10 or 12" coaxial Tannoy driver, an equally obtainable and rather generic, not to mention inexpensive dome supertweeter which brand I do not recall at the moment, in a hand cast 18K gold enclosure. The gold surely has increased in value since the product was produced, but as a speaker system it seems it would be rather average considering the absurd price.