These are my 20mm thick angola black granite speakers with volt woofers and scanspeak woofers.
They are ported on the bottom.
They took me about a month to build. Cost me about £1000 in materials and components.
They were designed by a friend in the know.
They weigh about 50kg for each speaker and 50kg for each stand. They stand just over 1m tall.
Thanks for looking
Adrian