DIY IPL Acoustics Transmission Line S4tl Speaker Kit Build

[davidsrsb]

The knuckle test make me think I would like to have tried extra panels on the other 3 sides - however that may have tipped the Mrs over the edge!

Odd, TL side panels are usually very well braced by the internal labyrinth

 

[underzone]

Odd, TL side panels are usually very well braced by the internal labyrinth

True, but the rigidity/knuckle test difference between single and dual layer 18mm MDF is quite staggering! Plus, MDF is cheap!