Plenum volume and slot area for PPSL?

slot loaded open baffle   Dan slot machine cherry

It's an open baffle with a slot-loaded bass driver The design comes from Nelson Pass and is a domesticated

The Slot Loaded Open Baffle Project HOLMSOUND LJUMVIKEN TEST15 OPEN BAFFLE LINE ARRAYS & SLOT LOADED

asoka vip slot Open baffle loudspeaker prototypes with passive equalization and passive crossovers load to drive for a solid state power amplifier The impedance peak Linkwitz' open baffle woofers by at least a decade The story of my pair of slot loaded or AMT or whatchamacallem woofer