MDF today is just timber dust that is glued together.The glue is very expensive so in the manufacturing process they put in just enough glue to stabilise the outside faces of the board. In the centre where there is very little glue there is no structural strength at all.
The Victor plinths appear to be more like the chipboard used in speakers in the 70's.This is quite different to modern MDF. From what I can see on the net the CLP2D Victor plinth appears to use layers of chipboard, and from the dark lines I can see, it would appear that they may have used layers of chipboard with each layer being veneered on both sides. The QLA7 appears to be a simplified and lighter version.
Fast foward to todays speakers - Dynaudio put forward that they can get a cleaner midrange out of MDF than plywood, but they veneer both sides of the MDF with hardwood veneer to strengthen the board.
An interesting material for plinths is Engineered Quatrz stone used in kitchen bench tops. Corian is basically a polycarbonate compound ( includes aluminium nitrate ( salt ) that is a fire retardant ). Engineered stone by comparison is around 93% Quartz stone and 7% Epoxy. It does need special blades for cutting but is much easier and less expensive than slate. Most decent bench top manufacturers use big router beds and if you draw up what you want including holes for TT, tonearm, screws etc they can cut everything for you very accurately.
The Victor plinths appear to be more like the chipboard used in speakers in the 70's.This is quite different to modern MDF. From what I can see on the net the CLP2D Victor plinth appears to use layers of chipboard, and from the dark lines I can see, it would appear that they may have used layers of chipboard with each layer being veneered on both sides. The QLA7 appears to be a simplified and lighter version.
Fast foward to todays speakers - Dynaudio put forward that they can get a cleaner midrange out of MDF than plywood, but they veneer both sides of the MDF with hardwood veneer to strengthen the board.
An interesting material for plinths is Engineered Quatrz stone used in kitchen bench tops. Corian is basically a polycarbonate compound ( includes aluminium nitrate ( salt ) that is a fire retardant ). Engineered stone by comparison is around 93% Quartz stone and 7% Epoxy. It does need special blades for cutting but is much easier and less expensive than slate. Most decent bench top manufacturers use big router beds and if you draw up what you want including holes for TT, tonearm, screws etc they can cut everything for you very accurately.