Burmester C500

The forthcoming C500 looks very interesting...
Treble & mid drivers are fixed to a front aluminium panel which slides into 2 positions & the subs mounted on the side can rotate.
They weigh 500kg (hence C500).

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I have a Burmeister in my car.  The speakers themselves are much like the Heil drivers of long ago....flat, pleated surface - very, very shallow in depth.