Members of the San Diego Music and Audio Guild visit a fellow member in Encinitas for music and scotch. The Marten Coltrane Supreme 2 speakers from Sweden stand almost 6 feet high. They use first-order crossovers, weigh 500 lbs. and cost as many thousand dollars. There are six 11-inch passive drivers on the rear. You might say these speakers have gravitas, especially with the EMM Labs MTRX 1500-watt amplifiers.