We took in a pair of STL4's part exchange against some active Meridians. They had 2x 8" Dalesford drivers in a transmission line, a single 8" Daleshord as a midrange and the obligatory Audax soft dome tweeter. They sounded amazing with a thunderous bass and a midrange to die for. They were imposing speakers which demanded a large room. They had a very low WAF even at that time which from memory was around 80/81. Very few were made and I feel somewhat honoured to have seen and heard a pair.