Hippocrates and Galen advanced the concept of humorism, a theory which held that we get sick from imbalances of the four basic substances within the human body, which they identified as blood, phlegm, black bile and yellow bile.
If I bought a pair of $190,000 Focal Grande Utopia EM and found out the beryllium isn't any more pure than a pair of $2700 speakers, I'd be very upset. I would also be upset if the beryllium tweeters in my $190K speakers cost less than diamond tweeters in a pair of $5K speakers.
Guaranteed systems are made from 3/4-inch high-density particleboard with durable melamine coating in seven colors and seven hardware finishes. Upgrades and accessories are optional. An 8-foot reach-in closet costs $400-$2,000; typical walk-in closet costs $800-$3,000 (priced by design).