Metal cabinet speakers

Magicos are the most lifeless sounding expensive speakers I've ever heard. The idea of making a ringing speaker is hideously dim. The idea of paying writers to tout them obviously not so dim.

@shadorne stated Genelec does make many different models out of aluminum. I own a pair of Genelec 8350A's that I adore. The use of metal also allows for speaker designers to work with a material of great rigidity. The cooling effect is also a plus. On the con side, cost and weight.

Karl Shuemann who used to frequently offer valuable posts here on Audiogon before opening his AudioMachina line, has made some very interesting speakers, some of which use metal cabinets.

Add Piega and Burmester to the list.

Mike Lenehan of Lenehan Audio in Australia, uses differential bracing including 6mm and 4mm sprung steel plates inside his ultra high end loudspeakers. Connected electrically to the ground terminal, as a ground plane. (I suspect also acts much like a Faraday Cage as well.)
He also uses depending on the outright high end models, cast iron rod as well as silicone filled rigid copper tube bracing (due to it's high Young's modulus). Which is why he uses very pure copper screws to secure the drivers in his all of his two way speakers. To help alleviated ringing of the spiders on the drivers against the baffle.

I have even heard a pair of his standmount speakers with an external crossover, and the cabinets were lined with 4mm solid copper plate.

Curious recording studios in LA and NYC learning of his achievements have enquired and purchased his nearfield monitors to satisfy their curiosity after being informed; immediately ordering a second pair for another studio room after verifying the reviews.

In a sea of well advertised audio equipment, his speakers are a well hid pot of audiophile gold. I worked for Mike and still own two pairs of his speakers, after giving my brother an older model, and selling my first pair to help pay for them.

I have built them myself, and I would welcome anyone who may be interested why they out perform speakers costing more than 10 times their cost. Real science, why it's superior and not salesman hyperbpole.

The benefits of metals in an enclosure are real, so long as you can also account for the limitations. Even metals have a resonant frequency, attenuating the ringing of metal is also why it benefits being laminated to another material.